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    23

















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    Kayak
    by Graham93 🇬🇧 ( Vice Admiral)
    📣










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    24 Posts 186 Comments 0 Photos 293 Likes
    Most recent posts shown first   (Show Oldest First) (Print Booklet)
    📝 Taping the joint
    10 days ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 48 Views · 14 Likes · 8 Comments
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    It's been a while since my last post on this blog. The really cold weather in December put me off spending time in the workshop and then Christmas arrived!

    The endoscope I was waiting for arrived before Christmas. Its very small and works well considering the cost of less than £10.

    I found some ribbon in SWMBO's sewing box. The label says "3yds 9d". Based on that, I guess it was bought in Leeds market sometime in the late 1960's by my mother-in-law. She could never have imagined it would get used for a kayak ! , but I'm sure she would be pleased to know it came in useful eventually 😂🤣

    I made some long reach tools to help positioning the ribbon and to apply the epoxy along the inside seam. I found I couldn't use the endoscope at the same time as using the tools inside the kayak, but it did prove useful to check at intervals that the ribbon was in the right position. A length of ribbon was fixed along the inside seam on both sides of the hull. It wasn't an easy task, but I got there in the end.

    Strips of ash veneer were laminated in position on both the stem and stern. Once the glue was dry they were sanded to a smooth shape.

    Lightweight glass fibre cloth was applied to the stem and stern and sealed with epoxy. Lengths of glass fibre were also applied over the hull to deck joint along both sides of the kayak. Again sealed in place with epoxy resin.

    💬 Re: Taping the joint
    7 days ago by 🇬🇧 marky ( Commodore)
    ✧ 19 Views · 3 Likes
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    Just catching up with lots of stuff on the site ,spent a couple of hours catching up on another great build from you ,I'm really impressed with your craftsmanship.
    Cant wait for the rest of the build and seeing Kevin?the Kayaker in action😉
    Cheers Marky👍
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    💬 Re: Taping the joint
    9 days ago by 🇳🇿 jbkiwi ( Fleet Admiral)
    ✧ 38 Views · 5 Likes
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    Nice job on a 'seamingly' tricky job Graham👍😁

    JB
    💬 Re: Taping the joint
    10 days ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 40 Views · 3 Likes
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    Hi Michael,

    There are plenty of low cost endoscopes available on line:


    https://www.ebay.co.uk/itm/Waterproof-USB-Endoscope-Borescope-Snake-Inspection-C
    💬 Re: Taping the joint
    10 days ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 40 Views · 3 Likes
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    Hi Martin,

    I don’t think I had a bucket big enough😂🤣. All I can say is I’m glad that bit is done!
    💬 Re: Taping the joint
    10 days ago by 🇭🇺 MouldBuilder ( Vice Admiral)
    ✧ 39 Views · 5 Likes
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    You really are doing a super job on the Kayak Graham. Your skills are clearly evident throughout the build.
    Peter.👍😊
    💬 Re: Taping the joint
    10 days ago by 🇬🇧 mturpin013 ( Vice Admiral)
    ✧ 44 Views · 6 Likes
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    "The endoscope I was waiting for arrived before Christmas. Its very small and works well considering the cost of less than £10."😠

    That sounds interesting and cheap, mine cost a lot more than that
    Any details?
    💬 Re: Taping the joint
    10 days ago by 🇩🇪 RNinMunich ( Fleet Admiral)
    ✧ 46 Views · 5 Likes
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    Excellent work as ever Graham👍
    So now you are also equipped and qualified to conduct 'keyhole' surgery😮
    Is there no end to the man's talents and skills???
    KUTGW Graham
    Cheers, Doug 😎
    💬 Re: Taping the joint
    10 days ago by 🇬🇧 Martin555 ( Fleet Admiral)
    ✧ 48 Views · 6 Likes
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    Hi Graham,
    Good to see an update on the Kayak.
    She is looking better each time I see her.
    Getting that ribbon in position could not of been easy due to the tight and restricted space.
    It would be interesting to know how much you had to put in the swear jar or did you have a swear bucket LOL!!

    Martin.
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    📝 Gluing the deck and hull together
    2 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 96 Views · 11 Likes · 19 Comments
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    My plan was simply to tape the two halves together and then run a length of fabric ribbon coated with epoxy resin along the inner seam. If only it were that simple!

    The first problem was that the hull sides had curved inwards such that they no longer line up with the edge of the deck. I assume this is a result of coating the inside of the hull with epoxy resin.

    To overcome this, several props were cut and wedged in place to spread the hull sides back to the correct width. Those props which would be unreachable once the deck was in place had lengths of string attached so that they could be pulled out once the two halves were glued together (assuming of course that the props weren't also inadvertently glued in position.)

    The second problem was that it isn't possible to see much inside the hull with the two halves taped together. This was going to make positioning the epoxy soaked tape along the joint seam difficult. I thought about a mirror on a stick to help see inside the hull, but then found I could buy an endoscope to to use with a smartphone or a laptop, for less than £7! This was duly ordered and then became stuck in the post with the current UK postal strikes.

    While waiting for the delayed post, I taped the two halves together with glass reinforced tape. Wanting to avoid gluing the temporary props in position while trying to place the epoxy soaked tape along the inner seam, I ran CA glue into the seam from the outside along both sides of the hull. Once the CA was fully dried, the props were removed and I was relieved to find that the joint held.

    Now waiting for the Royal Mail delivery ......

    💬 Re: Gluing the deck and hull together
    1 month ago by 🇳🇿 jbkiwi ( Fleet Admiral)
    ✧ 63 Views · 4 Likes
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    No pressure eh Peter😁

    JB
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    💬 Re: Gluing the deck and hull together
    1 month ago by 🇬🇧 Martin555 ( Fleet Admiral)
    ✧ 68 Views · 4 Likes
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    I agree Peter, Like you and many others I too an looking forward to it.

    Martin.
    💬 Re: Gluing the deck and hull together
    1 month ago by 🇬🇧 Martin555 ( Fleet Admiral)
    ✧ 68 Views · 4 Likes
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    Looking at the home screen it dose look a little crowed now
    I will have to look around to see what other changes have been made.

    Martin.
    💬 Re: Gluing the deck and hull together
    1 month ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 65 Views · 4 Likes
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    Thanks Peter,

    Progress has slowed this past couple of weeks due to the freezing weather. It’s way too cold to spend time in the workshop. Looks like I may be able to get back t it this week now it is warming up a bit.
    💬 Re: Gluing the deck and hull together
    1 month ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 65 Views · 5 Likes
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    Hi Martin,

    Yes, there have been a few changes to the site recently, mostly improvements although the picture viewer changes seem to work better on some devices (phones and tablets) and not so well on others (Windows PCs)
    💬 Re: Gluing the deck and hull together
    1 month ago by 🇭🇺 MouldBuilder ( Vice Admiral)
    ✧ 65 Views · 3 Likes
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    Hi Graham.
    I don’t want to be the Grinch, but this is a recent drone picture of the Bristol Royal Mail sorting office with all of the mail standing outside. Hope your area is better.
    Peter.😊
    💬 Re: Gluing the deck and hull together
    1 month ago by 🇭🇺 MouldBuilder ( Vice Admiral)
    ✧ 66 Views · 4 Likes
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    Hi Martin.
    Great to see you back.
    This Kayak must be one of the most awaited pond trials of all time. It really does look the part and could be the real thing in some photos. I hope it gets warm enough for you to continue with the build soon Graham.
    Peter.👍😀
    💬 Re: Gluing the deck and hull together
    1 month ago by 🇬🇧 Martin555 ( Fleet Admiral)
    ✧ 71 Views · 4 Likes
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    Hi Graham,
    I am very interested to see this project through to the end.
    I thought I would pop in and have a look around.
    It look's like there has been some changes to the site.

    Martin555.
    💬 Re: Gluing the deck and hull together
    1 month ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 68 Views · 4 Likes
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    Martin,

    Welcome back. Great to see you on the site again, and thank you for all the ‘likes’ which nudged me over the threshold to make ‘Vice Admiral’ 👍👍
    💬 Re: Gluing the deck and hull together
    1 month ago by 🇬🇧 Martin555 ( Fleet Admiral)
    ✧ 71 Views · 4 Likes
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    Hi Graham,
    Finally I have caught up with your Kayak build.
    Fantastic work.
    At last Bill and Ben will have a bit of competition LOL!!!

    Martin555.
    💬 Re: Gluing the deck and hull together
    2 months ago by 🇬🇧 AndyB ( Warrant Officer)
    ✧ 84 Views · 2 Likes
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    This is looking very very impressive
    Like other viewers, I’m looking forward to seeing it on the water.
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    💬 Re: Gluing the deck and hull together
    2 months ago by 🇳🇿 jbkiwi ( Fleet Admiral)
    ✧ 86 Views · 3 Likes
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    Hi Graham, don't worry,-with B+B out there with the 'anonymous paddler' showing him how it's done, I'm sure he'll be fine😁 Looking forward to seeing the kayak 'undressed'

    JB
    💬 Re: Gluing the deck and hull together
    2 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 90 Views · 5 Likes
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    Thanks Gary,

    I like the challenge of building something different because of the problems it throws up. Finding solutions to those is a large part of the fun. I have to admit though, the longer the build goes on, the more nervous I become worrying about if it will actually work when I get it on the water. It’s a lot of time and effort to put in for it to become a static model collecting dust 🙄
    💬 Re: Gluing the deck and hull together
    2 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 90 Views · 4 Likes
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    He Stephen,

    Thanks 👍 I forgot to mention the tapered ends on the spreaders so well spotted. As you suggested, having a minimal contact area would make them easier to break away should they become glued.
    💬 Re: Gluing the deck and hull together
    2 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 90 Views · 3 Likes
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    Hi Trev,

    Yes, the tape is temporary until I can reinforce the joint between the two halves.
    💬 Re: Gluing the deck and hull together
    2 months ago by 🇬🇧 GaryLC ( Lieutenant Commander)
    ✧ 92 Views · 6 Likes
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    I absolutely love this build because it's something completely different, and consequently created different and difficult problems along the way. All of which you have managed to solve and find solutions for, and kept soldiering on to your present almost complete stage. Well done you, an incredible, creative and very interesting build which looks fantastic, a master class in problem-solving, can't wait to see it on the water. Regards, Gary.
    💬 Re: Gluing the deck and hull together
    2 months ago by 🇭🇺 MouldBuilder ( Vice Admiral)
    ✧ 90 Views · 6 Likes
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    Fantastic work Graham. This really is an impressive piece of engineering. Really looking forward to the first pond trials.😊
    💬 Re: Gluing the deck and hull together
    2 months ago by 🇦🇺 stevedownunder ( Captain)
    ✧ 93 Views · 4 Likes
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    Wonderful work Graham,
    I like the thinned end of the spreaders, even if they are accidently glued they should break away.
    Cheers,
    Stephen.
    💬 Re: Gluing the deck and hull together
    2 months ago by 🇺🇸 pressonreguardless ( Captain)
    ✧ 93 Views · 4 Likes
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    Nice work, Graham
    Necessity is the mother of invention,
    Excellent resolution!
    Is the tape holding the halves together temporary?
    Trev
    📝 Hatch Fittings
    2 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 120 Views · 10 Likes · 6 Comments
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    One last thing to sort before gluing the deck and hull together are the fittings to hold the hatch in place.

    Two elastic straps running across the top of the hatch will hold it down and I hope they will apply enough pressure to seal the neoprene gasket which will be in place between the hatch and the hull.

    Brackets are needed to attach the straps to the hull. These were cut from a sheet of 0.8mm brass. A piece of masking tape was stuck on the brass sheet and the bracket outlines marked out on this. The holes were drilled and filed to shape before cutting the brackets from the sheet and bending them to shape.

    Using black elastic for the straps, I didn't want the brackets to be bright, shiny brass so they were blackened by placing in a sealed container with a piece of kitchen roll dampened with ammonia. It only took an hour to take the shine off them 👍

    Holes were drilled in the deck for the bracket fixing screws and M2 captive 'nuts' were made and attached to the underside of the deck. By having the nuts linked together in pairs, there is no chance of the nuts becoming loose and rotating when screwing the brackets in place. Based on experience, this is really important as the nuts will be difficult to access once the hull is assembled.

    Finally, two channels were ground into the edge of the hatch opening on the deck to allow any water that does get splashed onto the hatch to drain away rather than collecting around the edge of the hatch opening.

    💬 Re: Hatch Fittings
    2 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 105 Views · 3 Likes
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    Hi Trev,

    I have used magnets to hold hatches in place on other models, but I wanted to use straps this time as that’s often how the hatch is held in place on a full sized kayak.
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    💬 Re: Hatch Fittings
    2 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 104 Views · 4 Likes
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    Hi Dave,

    The brackets are black(ish) not chrome. I used ammonia fumes to take the brass shine off them.
    💬 Re: Hatch Fittings
    2 months ago by 🇺🇸 pressonreguardless ( Captain)
    ✧ 107 Views · 2 Likes
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    Brackets look great Graham.👍👍
    Did you consider magnets for a hold down?
    Trev
    💬 Re: Hatch Fittings
    2 months ago by 🇳🇿 jbkiwi ( Fleet Admiral)
    ✧ 110 Views · 3 Likes
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    Hi Graham, great job on the brackets,- spot on 👍👍

    JB
    💬 Re: Hatch Fittings
    2 months ago by 🇺🇸 River Rat ( Sub-Lieutenant)
    ✧ 124 Views · 1 Like
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    Very nice brackets. Beautiful planning and execution. The brackets appear to be chrome how did you do that if you don't mind me asking? Thanks, Fave
    💬 Re: Hatch Fittings
    2 months ago by 🇦🇺 stevedownunder ( Captain)
    ✧ 121 Views · 1 Like
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    Beautiful brackets along with the other work Graham.

    Cheers,
    Stephen.
    📝 Power distribution
    2 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 139 Views · 13 Likes · 12 Comments
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    I like to be able to turn the power on/off my models at the lakeside without having to remove hatches etc. I want a solution that is easy to operate and reliable, as there are so many other things to remember when preparing to launch. My two sailboats, the WeeNip and the Racing Sparrow have waterproof switches on the deck but this approach doesn't look right on a scale model. The power switches on my Crash Tender are fitted below the cabin hatch which slides over them to conceal them - if I remember 🤔. The Rowing boat and the Pilot Cutter have a pair of reed switches mounted below deck wired to a latching relay. A magnet is used to turn the power on and off by bringing it close to the appropriate switch above deck. One reed switch mounted on the port side turns the power on (P for Port and Power) and the other reed switch, mounted on the starboard side turns the power off (S for Starboard and Stop). This is the solution I'm going to use for the kayak.

    The circuit diagram shows how it is all wired up. The latching relay has two coils. Each coil is connected to one of the reed switches. When a magnet is brought close to the 'ON' reed switch it activates one of the coils in the relay operating the contacts and turning the power on. The relay maintains this position even when the magnet is removed and the coil is powered off. Bringing the magnet close to the 'OFF' reed switch activates the other relay coil operating the contacts and turning the power off. Hence the relay only consumes power while changing state from on -> off or off -> on. It does not consume any power while the model is operating (or switched off).

    A wiring harness was constructed on the bench having measured the required length of each of the connections. A charging socket is incorporated in the harness to allow the battery to be charged in situ. This socket will be accessible through the rear hatch.

    The final three photos show the complete installation, prior to permanent fixing of the deck. It is possible to install and remove everything through the cockpit and the rear hatch.

    💬 Re: Power distribution
    2 months ago by 🇺🇸 pressonreguardless ( Captain)
    ✧ 129 Views · 0 Likes
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    Got it, Graham,
    Many Thanks!!
    trev
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    💬 Re: Power distribution
    2 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 131 Views · 4 Likes
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    Hi Trev,

    Try looking for HF166F-12-1HDL2T-12VDC-magnetic-latching-relay. It is rated at 25A. There are several listed on eBay in the US.
    💬 Re: Power distribution
    2 months ago by 🇺🇸 pressonreguardless ( Captain)
    ✧ 129 Views · 2 Likes
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    Hi Graham
    2 AMP is what I found also. I will have to look harder for higher AMP Relays.
    I want to pursue it as it is a great resolution.
    Thanks Again for letting us Mates know👍👍
    Trev
    💬 Re: Power distribution
    2 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 133 Views · 3 Likes
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    Hi Trev,

    The relay contacts are rated at 2A. There are two sets of contacts which I have wired in parallel to double the rating to 4A. The rating for relay contacts is the maximum switching current. When switching on a model with the controls set to idle, there is very little current being drawn. The current carrying capacity of the contacts (not switching) will be higher. I expect the current being drawn by the kayak will be less than 4A.

    There are alternative latching relays available with much higher current ratings. I have one in my Crash Tender which is rated at 20A (if I remember correctly)
    💬 Re: Power distribution
    2 months ago by 🇺🇸 pressonreguardless ( Captain)
    ✧ 132 Views · 0 Likes
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    Thanks Graham👍
    How many amps is you relay?
    Trev
    💬 Re: Power distribution
    2 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 137 Views · 3 Likes
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    Hi Trev,

    The relay I’ve used is type HFD2 sourced from eBay. There are plenty of sellers offering it. You have to match the coil voltage to your battery. I use a 5v relay for either 4 or 5 cell NiMh battery.
    💬 Re: Power distribution
    2 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 137 Views · 0 Likes
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    Hi JB,

    Only forgotten it once 😥😫
    💬 Re: Power distribution
    2 months ago by 🇺🇸 pressonreguardless ( Captain)
    ✧ 134 Views · 2 Likes
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    Hi Graham,
    Thanks for sharing that info, I find it very useful,
    As I too dislike de-hatching in order to turn on switches.
    May I ask where you obtained the relays?
    Thanks,
    Trev
    💬 Re: Power distribution
    2 months ago by 🇳🇿 jbkiwi ( Fleet Admiral)
    ✧ 135 Views · 4 Likes
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    Nice solution Graham, just don't forget your magnet ! 😁

    JB
    💬 Re: Power distribution
    2 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 138 Views · 3 Likes
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    Hi Trev,

    Thanks, glad you like it. Thought it was worth explaining it in detail in case anyone else wants to try it.

    You are right, I’m not using a LiPo battery. It’s a 5 cell NiMh.
    💬 Re: Power distribution
    2 months ago by 🇬🇧 MotoPilot ( Petty Officer 1st Class)
    ✧ 139 Views · 4 Likes
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    A very neat solution
    Personally I’ve always used a robust switch on the main battery and a switch on the BEC to rx
    It does mean lifting a hatch to operate the switches but I’m mainly into tugs and there has always been something or some part of the deck fittings/superstructure that can easily be made removable.
    Like you, I enjoy sail also but only racing types so the usual switch in a pot has worked fine for me.
    Yours is a really neat solution for those scale jobbies 👍
    💬 Re: Power distribution
    2 months ago by 🇺🇸 pressonreguardless ( Captain)
    ✧ 136 Views · 2 Likes
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    Hi Graham
    Your power switching resolution is Great.
    Am I safe to assume that the battery is not LiPo as you are charging it on board?
    Trev
    📝 Rudder
    2 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 148 Views · 15 Likes · 8 Comments
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    Having a rudder is optional on a full size kayak, but I think it is going to prove essential on the model if there is to be any chance of it travelling in a straight(ish) line.

    Drawings of a typical rudder were copied from Nick Schade's book, scaled and glued to wooden blanks. The blade is cut from western red cedar, the other parts from birch ply. The parts were cut out, cleaned up and brass tubes fitted to each of the pivot holes to act as bearings. A brass fitting was made to mount the rudder on the stern of the kayak.

    To route the control lines from the rudder to the below deck servo two aluminium tubes were bent and glued to the underside of the rear deck with their aft ends protruding through the deck. These ends were then trimmed flush with the deck. The inboard ends of the tubes were flared.

    Two cords will run from either side of the rudder, through the tubes and then to either side of the servo arm. The cords will be tensioned with either elastic or springs. I prefer the idea of using springs as they won't perish over time.

    Final assembly will not be done until the deck has been attached to the hull, but I needed to get the aluminium tubes in place before then.

    💬 Re: Rudder
    2 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 146 Views · 2 Likes
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    Thanks Cash,

    My Bill and Ben rowing boat doesn’t have a rudder and depends on control of the oars for steering. It is susceptible to cross winds, so I don’t sail it when the wind is up. I won’t have as much control over steering with the single kayak paddle compared with the two oars in the rowing boat hence the addition of the rudder which I expect will be essential
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    💬 Re: Rudder
    2 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 146 Views · 3 Likes
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    Hi Trev,

    I don’t use AutoCAD. I scanned the rudder drawing from the book and then used photo editing software to scale it to the required size. Quicker and simpler than trying to redraw it.
    💬 Re: Rudder
    2 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 146 Views · 4 Likes
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    Thanks Neil,

    I’m planning to fit a small spring in each of the control lines to keep them tensioned. I’ve also made sure that the spacing of the control lines at the rudder attachment points is the same as at the servo arm which will help ensure the lines stay taught.
    💬 Re: Rudder
    2 months ago by 🇺🇸 Cashrc ( Commodore)
    ✧ 146 Views · 3 Likes
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    I built a Graupner Tina a while back, and in my limited experience I thought that boat could have used a rudder mixed in for turns. Now, a kayak is not as tall as the Tina, but I would think it would help especially in a crosswind. Your kayaks looking good and should be a fun, interesting model to see in operation.
    Cash
    💬 Re: Rudder
    2 months ago by 🇳🇿 jbkiwi ( Fleet Admiral)
    ✧ 146 Views · 4 Likes
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    Should work very nicely Graham.

    JB
    💬 Re: Rudder
    2 months ago by 🇺🇸 pressonreguardless ( Captain)
    ✧ 145 Views · 2 Likes
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    Nicely Done Graham👍👍
    AutoCAD Drawing?
    Trev
    💬 Re: Rudder
    2 months ago by 🇦🇺 stevedownunder ( Captain)
    ✧ 148 Views · 2 Likes
    Flag
    Hi Graham,
    Your rudder has come up very nicely.

    Cheers,
    Stephen.
    💬 Re: Rudder
    2 months ago by 🇬🇧 neilw ( Chief Petty Officer 2nd Class)
    ✧ 151 Views · 2 Likes
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    Excellent work. I built the full sized version for my sailing canoe earlier this year. Found micro adjustment is required to keep both control lines equal length in order to keep any slack out of the system.
    📝 Fitting the controls
    3 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 158 Views · 10 Likes · 3 Comments
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    In addition to the rowing mechanism, I need to install the battery, receiver, paddling electronics and rudder servo.

    For the battery, I decided to use 5 NiMh cells rated at 3300mAh. The decision was based on several factors.
    1. Experience with the rowing boat where I've used 4 cells rated at 3700mAh. The rowing boat had 9 servos plus a 'transistor radio' and a smoke generator for Ben's pipe. The battery typically gives an hour or so rowing time, more if Ben doesn't light his pipe!🤣. The kayak has 3 servos plus the drive motor (a modified servo) so the selected battery should give plenty of duration.
    2. The kayak needs some ballast and I prefer to use larger cells for this, rather than having to add dead weight.
    3. The selected cells will fit under the paddler (just!)

    The position of the battery under the paddler brings the centre of gravity of the kayak to a position just behind the location of the paddle which I think is where it should be. I may need to add some more ballast to balance everything up once the build is complete.

    The receiver and paddle electronics are fitted into a plastic box (shown without it's lid) which sits just behind the paddler and battery.

    The rudder servo is mounted behind the receiver. Both the receiver and the servo can be accessed through the rear hatch.

    If you look carefully at the differences between photos 4 and 5 you will notice one of my 'mistakes'. Having glued the servo mount in the position shown in photo 4, I realized that I couldn't access the rear fixing screw through the hatch opening. The mount was carefully cut free and repositioned as shown in photo 5. Glad I spotted the issue at this stage rather than later.

    💬 Re: Fitting the controls
    2 months ago by 🇩🇪 RNinMunich ( Fleet Admiral)
    ✧ 152 Views · 4 Likes
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    "Down the hatch!"
    More wizardry from the The Master👍
    Including this time lessons in marquetry 😮
    Gobsmacking good stuff.
    Can't wait to see 'Kayak Ken' paddling merrily away,
    with Bill & Ben struggling to keep up😁 Ben will have to give up smoking!
    Cheers, Doug 😎
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    💬 Re: Fitting the controls
    2 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 155 Views · 3 Likes
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    Thanks Dave,

    I’ve spent a lot of time thinking through different ways to fit everything in. It’s working out OK so far I think but the real test will be when I get it on the water 🤞
    💬 Re: Fitting the controls
    3 months ago by 🇺🇸 River Rat ( Sub-Lieutenant)
    ✧ 160 Views · 3 Likes
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    I was wondering how you were going to pack all that stuff in such a small space. Looks like you got it all worked out. Again great work Graham. Dave
    📝 Hatch
    3 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 167 Views · 9 Likes · 9 Comments
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    As the cockpit opening is filled with the mechanism and the paddler there isn't much access available for anything else, so I decided to add a hatch behind the cockpit to give access to the rudder servo and the radio gear. It is not unusual to have a hatch in this location on full sized kayaks.

    A paper template was drawn up on the computer, printed and taped to the deck. A scalpel was then used to cut around the hatch outline. It took a while, but eventually the hatch came away in one piece.

    The template was rescaled on the computer to produce two more templates for a plywood rim to be fitted to the opening. The rims were cut from 1.5mm ply and glued into position.

    The hatch will sit flush in the opening. It will eventually be fitted with a neoprene gasket and held in place with elastic straps. The double plywood rim creates space for the gasket while keeping the hatch cover flush with the deck.

    💬 Re: Hatch
    3 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 161 Views · 4 Likes
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    Thanks Dave,

    The fact you can’t see my mistakes shows that I’ve had a lot of practice hiding them 😂
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    💬 Re: Hatch
    3 months ago by 🇺🇸 River Rat ( Sub-Lieutenant)
    ✧ 163 Views · 3 Likes
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    We all make mistakes. Problem is...I don't see any here. You're a very talented man and an inspiration to me as well as others I'm sure. Keep up the great work. Can't wait for the next installment. Dave
    💬 Re: Hatch
    3 months ago by 🇺🇸 pressonreguardless ( Captain)
    ✧ 161 Views · 2 Likes
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    Hi Graham
    I got the making mistakes down Pat! 😂🤣😂
    Trev
    💬 Re: Hatch
    3 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 164 Views · 5 Likes
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    Hi Trev,

    I’m always making mistakes. I guess I’ve just got better at hiding them over the years. 😂

    “Anyone who never made a mistake, never made anything”
    💬 Re: Hatch
    3 months ago by 🇺🇸 pressonreguardless ( Captain)
    ✧ 161 Views · 2 Likes
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    Hi Graham
    You must have been a bit nervous as it is all brightwork making mistakes hard to hide.
    Trev
    💬 Re: Hatch
    3 months ago by 🇬🇧 philcaretaker ( Captain)
    ✧ 165 Views · 2 Likes
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    So that was the plan you "hatched" to access the "R&R" - great job Graham !.⛵
    💬 Re: Hatch
    3 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 165 Views · 3 Likes
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    Thanks Trev, JB,

    I wanted as fine a cut as possible, hence the use of a scalpel. It still needs some cleaning up and sealing with epoxy.
    💬 Re: Hatch
    3 months ago by 🇳🇿 jbkiwi ( Fleet Admiral)
    ✧ 164 Views · 3 Likes
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    Nice bit of fitting Graham👍
    💬 Re: Hatch
    3 months ago by 🇺🇸 pressonreguardless ( Captain)
    ✧ 164 Views · 2 Likes
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    Excellent job with the Hatch Graham👍👍
    I am aways reluctant to cut into work already completed.
    Trev
    📝 Installing the mechanism
    3 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 174 Views · 14 Likes · 5 Comments
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    Before the hull and deck can be permanently joined together, the mountings for the paddling mechanism need to be installed in the hull. Checks also need to be made to make sure that, once the kayak is completed, it will be possible to install the mechanism through the cockpit opening.

    The mechanism was developed and tested while mounted in a cardboard mock-up of the kayak. Now, cardboard supports were cut to position the mechanism in the hull in the correct longitudinal position, and at the right height. Once everything looked to be OK the cardboard supports were used as templates to cut the final shapes from 3mm ply. These were then tacked into position with superglue and the mechanism installed for a final check with the deck in place.

    It soon became clear that it was not going to be possible to install the mechanism in one piece, through the cockpit opening. This was not entirely unexpected based on the experience with the cardboard mock-up. The mechanism baseplate was cut in two, separating the paddler from the remainder of the mechanism. The two pieces are held in position with M4 dome head screws which fasten into a tapped brass plate glued underneath the plywood support rail. There is only one linkage between the paddler and the mechanism which will be straightforward to attach through the cockpit opening.

    💬 Re: Installing the mechanism
    3 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 172 Views · 3 Likes
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    Hi Stephen,

    I certainly hope I don’t need to remove the mechanism to charge the battery. Getting everything in and connected is going to be a bit like keyhole surgery and I don’t want to do it more often than I have to.

    The plan is to be able to charge the battery in situ so nothing needs to be dismantled.
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    💬 Re: Installing the mechanism
    3 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 172 Views · 3 Likes
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    Thanks Michael,

    It’s the ‘unfortunate’ issues that I enjoy solving. It’s what makes scratch building such a challenge.
    💬 Re: Installing the mechanism
    3 months ago by 🇺🇸 pressonreguardless ( Captain)
    ✧ 169 Views · 2 Likes
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    Quite the engineering feat Graham. 👍👍
    Just need a bit of the old shoehorn😁
    Trev
    💬 Re: Installing the mechanism
    3 months ago by 🇦🇺 stevedownunder ( Captain)
    ✧ 171 Views · 2 Likes
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    Lovely work Graham,
    Am I right in saying that you will remove all of the mechanism to charge the battery?

    Cheers,
    Stephen.
    💬 Re: Installing the mechanism
    3 months ago by 🇬🇧 mturpin013 ( Vice Admiral)
    ✧ 176 Views · 3 Likes
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    These unfortunate issues do arise when your building to you own design however you somehow manage to overcome these issues with your usual ingenuity, overall great work I can't wait to see it on the water, its a credit to you.
    📝 Cockpit coaming
    3 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 180 Views · 14 Likes · 9 Comments
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    The cockpit needs a coaming adding to strengthen the opening and to give something for the spray skirt to attach to.

    The coaming is built from lots of short cedar planks cut from offcuts of the strips used to cover the hull. These were glued all around the edge of the cockpit with CA glue. With all the strips in place and smoothed off, the deck was masked and a layer of glassfibre and epoxy resin applied around the outside.

    Once the resin had hardened a layer of masking tape was applied over the resin and several strips of veneer were clamped around the coaming to form a lip. CA glue was applied to the top edge of the veneer layers and allowed to soak in. Once set, the lip was removed and cleaned up/sanded to a reasonable shape before being glued back onto the coaming using temporary spacers from the deck to ensure an even height.

    The vertical strips forming the coaming were then trimmed down to the top edge of the lip and another layer of fibreglass and epoxy resin applied covering the whole coaming inside and out.

    Finally the deck was removed from the formwork and the underside was coated with fibreglass and epoxy resin.

    💬 Re: Cockpit coaming
    3 months ago by 🇦🇺 stevedownunder ( Captain)
    ✧ 177 Views · 2 Likes
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    Hi Graham,
    Cannot really add to what others have said, but great work.
    Looking forward to the next instalment...

    Cheers,
    Stephen.
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    💬 Re: Cockpit coaming
    3 months ago by 🇳🇿 jbkiwi ( Fleet Admiral)
    ✧ 179 Views · 4 Likes
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    Beautiful job Graham, yet again, matches perfectly👍👍

    JB
    💬 Re: Cockpit coaming
    3 months ago by 🇺🇸 pressonreguardless ( Captain)
    ✧ 177 Views · 3 Likes
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    Excellent resolution to the spray skirt lip, Graham👍👍
    Reflects the theme of the planking.
    Trev
    💬 Re: Cockpit coaming
    3 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 181 Views · 5 Likes
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    Thanks Gary, I did consider starting the blog with “And now for something completely different “😁

    I like the challenge of trying something different. It provides lots of problems to solve and many hours exercising the gray matter while trying to work out the next step.
    💬 Re: Cockpit coaming
    3 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 180 Views · 5 Likes
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    Thanks Dave,

    I’m also keen to see it in action. The longer the build takes, the more apprehensive I get. After all this effort, will it work? I had the same concerns while building the rowing boat for Bionic Bill and Ben. Fortunately that worked out OK so hopefully this one will be fine.

    Unfortunately it is going to be a while yet before it’s finished
    💬 Re: Cockpit coaming
    3 months ago by 🇬🇧 GaryLC ( Lieutenant Commander)
    ✧ 184 Views · 5 Likes
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    Hi Graham, a very interesting build if ever there was, reminiscent of a Monty Python sketch that started with the words,"and now for something completely different," which it most certainly is, different, very interesting, captivating in the fact in the fact I can't wait to see what comes next. Roll on the next episode. Keep up the good work as you are doing an incredibly skillful job of master-minding this project. Regards, Gary.
    💬 Re: Cockpit coaming
    3 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 180 Views · 6 Likes
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    Thanks Colin,

    Yes, the plan is for an elasticated spray deck which will grip around the paddler and over the coating lip.

    Unfortunately the spray deck will have to have a couple of holes in to for the paddling mechanism. I haven’t worked out the details for that yet but I hope to be able to keep most of the water out. I don’t expect to be paddling in waves or down weirs!😧
    💬 Re: Cockpit coaming
    3 months ago by 🇺🇸 River Rat ( Sub-Lieutenant)
    ✧ 179 Views · 4 Likes
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    Graham, your work is outstanding! The brightwork is just beautiful. Combing...Wow! Hats off to you. Cant wait to see it in action. Thanks Dave
    💬 Re: Cockpit coaming
    3 months ago by 🇬🇧 Colin H ( Admiral)
    ✧ 177 Views · 5 Likes
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    Graham will your paddling person be wearing an elasticated spray deck. I remember building a KL KAYAK at school in 1963 and having great fun travelling from Leicester on the river soar right out to the coast and back again. I wore a waterproof canvas spray deck which had elasticated middle and an elasticated outer edge, it was very good at keeping out the water when going through the waves or down weir's.
    The coaming round the cockpit had a lip that the elasticated edge locked into.
    Loving your build and admiring the pure brilliance of your mind-set.
    Awaiting your next instalment with keen interest.
    Cheers Colin.
    📝 Coating the deck
    3 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 191 Views · 14 Likes · 7 Comments
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    While the epoxy on the hull was left to harden, the deck was reattached to the formwork with hot glue. This is to ensure that the lightweight (flimsy!) deck is held in the correct shape. A layer of lightweight fiberglass with the weave running at 45 degrees was then draped over the deck and epoxy resin applied.

    Progress is slow and frustrating with having to wait for the epoxy to harden at each step.

    💬 Re: Coating the deck
    2 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 150 Views · 0 Likes
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    Hi Doug,

    Yes, I expect EzeKote would be a good alternative although I don’t have any experience with it. I’m just using up what I have in stock. I live not too far from Easy Composites and made a bulk purchase a couple of years ago.
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    💬 Re: Coating the deck
    2 months ago by 🇩🇪 RNinMunich ( Fleet Admiral)
    ✧ 153 Views · 1 Like
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    Hi Graham,
    Great work with fascinating,informative and entertaining Blog, as ever👍
    Re: "Progress is slow and frustrating with having to wait for the epoxy to harden at each step."
    Can't you use the water based EzeKote from Deluxe Materials instead?
    At room temperature (around 20°C) it dries and hardens in around 20 to 30 minutes.
    A little longer if you dilute it with 10 to 20% water, which I often do with the first coat to help it soak in and strengthen the wood. Especially on soft woods like balsa or on old thin dry/brittle woods, which I'm often confronted with on restoration jobs.
    KUTGW!
    Cheers, Doug 😎
    💬 Re: Coating the deck
    3 months ago by 🇬🇧 Graham93 ( Vice Admiral)
    ✧ 180 Views · 5 Likes
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    Thanks Michael, I'm glad you are enjoying it. I do like to build from scratch using full sized techniques just in miniature.

    Graham93
    💬 Re: Coating the deck
    3 months ago by 🇬🇧 mturpin013 ( Vice Admiral)
    ✧ 184 Views · 2 Likes
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    Hi Graham all good things take time, this is once again turning out to be an outstanding build and I think a first of this type of construction on this site
    great work
    💬 Re: Coating the deck
    3 months ago by 🇭🇺 MouldBuilder ( Vice Admiral)
    ✧ 180 Views · 2 Likes
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    Looks really good Graham. I will ask you about glassing soon. My attempts on my large real boat has been challenging at best. Lovely job.
    Peter.
    💬 Re: Coating the deck
    3 months ago by 🇺🇸 pressonreguardless ( Captain)
    ✧ 185 Views · 2 Likes
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    Hi Graham,
    That is my complaint with epoxy also, the time it takes to cure.
    The Kayak is truly a work of art!!
    Trev
    💬 Re: Coating the deck
    3 months ago by 🇬🇧 philcaretaker ( Captain)
    ✧ 190 Views · 1 Like
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    Patience is a virtue - often found in many - but not in me !. Well done Graham.
    Show 14 More Posts


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