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    Vintage Model Works 46" RAF Crash Tender
    97 Posts ยท 30 Followers ยท 590 Photos ยท 983 Likes
    Began 8 years ago by
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    ๐Ÿ“ Vintage Model Works 46" RAF Crash Tender
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง robbob ( Admiral)
    โœง 49 Views ยท 5 Likes
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    Here's the history bit so pay attention...
    Many years ago as a boy in the fifth year of my north London secondary school, circa 1971, our woodwork class was given the option to make something of our own choice.
    Having mastered the majority of joints, wood turning, finishing techniques and the making of table lamps, stools and bookshelves etc. this seemed a good idea, so myself and a fellow classmate and model making chum asked if we could construct a model boat.
    The teacher, on hearing that it was to be from a kit and not from scratch was a little surprised but agreed.
    So my friend and I jointly invested about 20 quid in an Aerokits 34.5 inch RAF Crash Tender from Blunts' model shop in Mill Hill (long since gone like many others) and we set about construction during lesson time and sometimes at break times.
    I recall we used "Cascamite" to glue it all together on the advice of the woodwork teacher because neither 'Scotch' glue nor PVA was suited to marine construction.
    Good progress was made over the course of our last year at school but it was never fully completed, only requiring painting, running gear and detailing.
    My friend decided that he needed to withdraw from the project as he was enrolling in a college away from home to study for a career in the merchant navy and I agreed to buy out his share and continue with the project.
    And so it was that I carried on with the painting and installing the running gear which consisted of a 1.5 cc marine diesel engine, water pickup, prop shaft and rudder and a MacGregor radio system with a stick for steering and a single button for speed control.
    The engine and radio came from Michael's Models in Finchley (also long gone) for ยฃ20 as my elder brother, who had started a Saturday job there, was able to get a staff discount for me.
    The diesel engine was noisy and smelly and a pig to start with a leather thong around the flywheel and I decided to abandon this means of propulsion (I foolishly ran it for slightly too long 'dry' and melted the soldering around the brass water jacket!).
    By now I had graduated from my part time job in Woolies to an engineering apprentice with Post Office Telephones and my new income of 20 quid per week could support my modelling and electronics hobbies after my contribution to the household for my keep.
    So off to the model shop to buy a Taycol Supermarine electric motor, two 12v volt lead acid batteries and a suitable charger.
    The diesel came out and was sold on Exchange & Mart and the mount and coupling re-made to accommodate the new Taycol motor.
    What an improvement that was!
    I can't remember now what speed controller or servo I used but whatever it was did the job, and it went like the clappers on Friary Park boating lake (also long since gone) even though the radio control system was a bit crude with the non-proportional steering and 'blip' throttle control.
    The boating took a back seat when I acquired my driving licence and my first car (a rusty old Cortina Mk 1) and I also got involved in sound recording for radio.
    I decided to sell the boat and bits for ยฃ60 through Exchange & Mart and bought an Akai 4000DS tape recorder and a 'Chilton' audio mixer, built a home studio and along with a good mate of mine started making radio commercials for the new commercial radio stations including London's Capital Radio.
    We even won a 'Campaign' advertising award for one of our efforts! And so after several years as a 'phone engineer I moved into professional recording for A/V and broadcast and then into TV production.
    Fast forward to today.
    Semi-retired with grand kids and with more free time on my hands I still had an interest in model making so in Jan 2016 went to the Model Engineer exhibition at nearby 'Ally Pally'.
    It was there that I saw an RAF crash tender just like the one I built all those years ago and got into conversation with the chap on the stand.
    This re-ignited my model making interests and I researched the hobby and that model in particular.

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    ๐Ÿ“ Vintage Model Works 46" RAF Crash Tender
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง robbob ( Admiral)
    โœง 52 Views ยท 7 Likes
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    In May an eBay item caught my attention, it was a 46" unbuilt and complete Crash tender by Vintage Model Works and my bidding secured it for just under ยฃ200.
    I drove to Gt Yarmouth to collect it from the seller as I did not want to entrust it's delivery to the likes of Parcelfarce or similar.
    The kit was indeed complete and in mint condition with fittings, transfers and plans/instructions.
    The documents were dated April 2012 and the recommended motor, ESC & batteries etc. were by now obsolete/unavailable so I put call in to Mike Cummings at Vintage Model Works who answered a few questions about the kit and contents, he in turn put me in touch with a very helpful chap by the name of Alan Holmes who recommended a motor, ESC and battery combination from Hobbyking and Component Shop that were more suitable.
    I would like to thank them both for their advice and guidance on the construction of the model as it has proved invaluable to me.
    Mike also suggested a build blog on this site would be appreciated by others too which I am happy to start now.
    I have documented the construction in photographs since the start in Mid May and will continue until it is completed but I decided not to start the blog until I was well into the build and had sufficient material to post regularly.
    I am now at the painting stage and slowly nearing completion......

    ๐Ÿ“ Vintage Model Works 46" RAF Crash Tender
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง robbob ( Admiral)
    โœง 52 Views ยท 6 Likes ยท 3 Comments
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    Checked the kit contents against the supplied list and it's all complete including the white metal fittings, windows and frames and transfers.
    The building instructions and diagrams are less than concise but a good enough as a guide.
    Had to buy some new modelling tools, saws, knives etc.
    Luckily I already had a Dremmel with a good range of cutting and drilling accessories.
    Aliphatic and epoxy adhesives and brass pins are on order so meanwhile I cut out the keel and bulkheads from their respective panels and dry fit them to the building board and jig to see how accurate and square the hull will be.

    ๐Ÿ’ฌ Vintage Model Works 46" RAF Crash Tender
    8 years ago by ๐Ÿ‡บ๐Ÿ‡ธ figtree7nts ( Admiral)
    โœง 49 Views ยท 1 Like
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    Hi Robbob

    Thanks for answering my question, I way just curious about how the parts are cut out.
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    ๐Ÿ’ฌ Vintage Model Works 46" RAF Crash Tender
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง robbob ( Admiral)
    โœง 49 Views ยท 1 Like
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    Hi figtree7nts.
    The parts are cut with a CNC router which seems to give very consistent and accurate cuts and I have not needed to 'ease' any of the interlocking parts.
    I recall that the Aerokits 34.5 inch model I built all those years ago needed a little work to make the parts fit, they may have been die cut.
    It's also very good quality ply and obeche wood in the kit.
    Robbob
    ๐Ÿ’ฌ Vintage Model Works 46" RAF Crash Tender
    8 years ago by ๐Ÿ‡บ๐Ÿ‡ธ figtree7nts ( Admiral)
    โœง 49 Views ยท 1 Like
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    Question are the parts die cut or are laser cut?
    ๐Ÿ“ Vintage Model Works 46" RAF Crash Tender
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง robbob ( Admiral)
    โœง 53 Views ยท 7 Likes ยท 3 Comments
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    Dry fitted all the keel parts and bulkheads and transom, the jig has supports at the front and rear to secure the bow and transom in perfect alignment and metal 'L' bracket to keep the bulkheads vertical and square.
    The cabin sides lock everything in place but will require some shallow cuts on the inner surfaces to bend properly without breaking.
    I'll be using Titebond 11 and Zpoxy 30 minute epoxy as recommended, adhesives have come a long way since my last boat build when mixing 'Cascamite' up to the right consistency was a bit of a pain as I recall.
    When the propshaft arrives I can cut the keel to accommodate it and start glueing and clamping it all together.
    I have bought lots of clamps to hold the bits while the glue dries, it seems you can't have too many of those !

    ๐Ÿ’ฌ Vintage Model Works 46" RAF Crash Tender
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง onetenor ( Sub-Lieutenant)
    โœง 49 Views ยท 1 Like
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    Vinegar etc is fine once dried out and allows for quite sharp bends Steaming also is good if steamed long enough. However V cuts are very good too .Good luck with the build it looks good so far . John
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    ๐Ÿ’ฌ Vintage Model Works 46" RAF Crash Tender
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง robbob ( Admiral)
    โœง 49 Views ยท 1 Like
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    Hi onetenor.
    Good suggestions but...
    steaming works extremely well for gentle curves and I have used this method very successfully to form the hull skins and strakes.
    In this case the cabin sides need to bend quite sharply in a couple of places on each side so the 'vee' cuts allows the wood to do this without the fibres of the outer ply tearing or the ply snapping. Not sure that I'd want to dunk the wood in vinegar or ammonia though ๐Ÿ˜ฏ
    Thanks.
    Robbob
    ๐Ÿ’ฌ Vintage Model Works 46" RAF Crash Tender
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง onetenor ( Sub-Lieutenant)
    โœง 49 Views ยท 1 Like
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    Most woods including ply bend better when soaked ( vinegar or ammonia is better than water ) but water is ok and is a bit better when hot.Steaming works even better
    ๐Ÿ“ Vintage Model Works 46" RAF Crash Tender
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง robbob ( Admiral)
    โœง 52 Views ยท 7 Likes
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    Glue, pins and sanding sealer at the ready.
    I have put the 'vee' cuts in the cabin sides to allow for the sharp bends and also where the wheelhouse window needs to bend to meet the roof, the rear cockpit sides have also been glued to the rear of the cabin sides.
    The propshaft slot has been cut, the false keels will also be pinned to the main keel with 15mm brass panel pins.

    ๐Ÿ“ Vintage Model Works 46" RAF Crash Tender
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง robbob ( Admiral)
    โœง 51 Views ยท 6 Likes ยท 3 Comments
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    Happy that keel and bulkheads fit square and true so they can now all be glued and pinned using the 30 minute epoxy.
    I have decided to chamfer the keel parts particularly at the bow, parts K2, K3 and the chine formers, to the approximate angles where required before assembly as it's easier to do at this stage while they are off the keel and they can be lightly trimmed and shaped to their final angles later. Once all the false rebates are fitted to the keel it is slotted into the jig and the bulkheads glued and assembled on the keel, the metal brackets ensure that it's all kept true and square. Brass pins in pre drilled holes and lots of clamps hold the parts firmly while the epoxy sets.
    The Cabin sides are dry fitted to lock everything in place.

    ๐Ÿ’ฌ Vintage Model Works 46" RAF Crash Tender
    5 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง Boat660 ( Able Seaman)
    โœง 53 Views ยท 2 Likes
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    Thanks Rob, will do.
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    ๐Ÿ’ฌ Vintage Model Works 46" RAF Crash Tender
    5 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง robbob ( Admiral)
    โœง 52 Views ยท 5 Likes
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    Hi Russell
    I assume that you are referring to bending the stringers and skins?
    There's no need to be worried, the ply skins respond very well to heating with a hot air gun (electric paint stripper) and the obeche stringers, if well steamed, bend fairly easily too.
    Scratch that itch and buy the kit, you won't regret it.
    Robbob.๐Ÿ˜
    ๐Ÿ’ฌ Vintage Model Works 46" RAF Crash Tender
    5 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง Boat660 ( Able Seaman)
    โœง 55 Views ยท 4 Likes
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    Hi Rob,
    I briefly had a conversation with you last weekend at AP.
    This is a general question on the build blog, (by the way your build and finish is exceptional) that I have read several time to familiarise myself on the build detail and would welcome your advise. I'm itching to purchase the fire tender. I'm a confident model builder, however I have never built a wooden boat before, and note your comments on the gunwhale stringer, and skins which is holding me back from the purchase.๐Ÿค”
    Russell
    ๐Ÿ“ Gunwhale stringers.
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง robbob ( Admiral)
    โœง 51 Views ยท 6 Likes ยท 9 Comments
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    The cabin sides are now glued to the assembly and checked for square and left to dry while I dig out the wallpaper steamer in preparation for steaming the gunwhale stringers. I have a length of aluminium tubing that is ideal for a steaming tube, one end can be sealed using some duct tape and the length of the tube is sufficient to take the strakes over distance that they need to be formed.
    The outlet tube of the steamer is long enough to reach outside to prevent condensation inside the workshop and stop my glasses from steaming up too !
    About 15 minutes is sufficient to soften the wood and make it very pliable and when ready they are placed in the bench vice and bent to a curvature greater than required so that when they are cold they relax to approximately the right amount. The stringers are actually laminated from two pieces and the inner pieces are fitted first on each side so that the assembly doesn't twist, these are epoxied and pinned into position and lots of clamps used to hold it all together. At all stages the assembly is checked for squareness.
    The process is repeated for the outer lamination of the gunwhale stringers, and so far I haven't managed to snap anything or scald myself !

    ๐Ÿ’ฌ Gunwhale stringers.
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง BOATSHED ( Lieutenant)
    โœง 49 Views ยท 1 Like
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    I live in Darenth on the edge of Dartford, its a bit of a trip but its a great pond. I could go out to Maidstone as well, that's a good pond and if you want to use ic then its a Saturday job for those. St Albans or Stevenage is a fair old run from you.
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    ๐Ÿ’ฌ Gunwhale stringers.
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง robbob ( Admiral)
    โœง 49 Views ยท 1 Like
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    Hi Boatshed.
    I'm actually in north west London, Mill Hill/Hendon and there are no local boating lakes remaining.
    The nearest may well be St.Albans or Stevenage, also there are no model clubs or societies that I am aware of in my area which is a shame as a club membership and the resulting breadth of knowledge and experience would be very welcome.
    Also, Clapham is 'sarf' london and there be demons!
    No disrespect to south London members. ๐Ÿ˜€
    Robbob
    ๐Ÿ’ฌ Gunwhale stringers.
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง BOATSHED ( Lieutenant)
    โœง 49 Views ยท 1 Like
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    Hi just seen your reply, I clicked on your name robbob and it came up you are in London, I don't know where about's
    in London you are but if there is a great pond on Clapham Common, its called Clapham Common Long Pond. its a good pond I used to go there quite a lot, will proably start again come next spring. Hope this helps.
    ๐Ÿ’ฌ Gunwhale stringers.
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง robbob ( Admiral)
    โœง 49 Views ยท 1 Like
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    Hi Boatshed.
    Yes it's an outrunner.
    If heat build-up is a problem I have already considered a water cooled mount as a retrofit option. I won't really find out how she runs until her maiden voyage, assuming I can find somewhere reasonably near me ๐Ÿ’ญ .
    Rob.
    ๐Ÿ’ฌ Gunwhale stringers.
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง BOATSHED ( Lieutenant)
    โœง 49 Views ยท 1 Like
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    Hi again I have just looked up this motor, Turnigy SK3 4250 and on Hobbyking's site it states its on outrunner, how ill you cool it as surely it will get hot running at speed ?? With a Vosper hull you have to run it fast to get the enjoyment from it as they look so good planning at high speed.
    ๐Ÿ’ฌ Gunwhale stringers.
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง robbob ( Admiral)
    โœง 49 Views ยท 1 Like
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    Hi Dave.
    Yes, sorry, my typo.
    The battery packs are 9.6v at 5000mAh, so the correct figures for the packs in series are 18.2v at 5 amps. I will correct my profile entry ๐Ÿ”จ
    I do have a wattmeter in the wiring loom but as the boat has not even been in the test tank (bath) yet I have not been able to measure current under load.
    I can very easily re-configure the battery set-up to parallel to give me 9.6v at 10A to give me a lower 4800 rpm as an experiment but I will try it as it stands first.
    At this moment in time I have just put the second coat of red oxide on the lower hull so at the current rate of progress I don't see it getting it's maiden voyage until the spring of 2017. in fact I still need to find somewhere local(ish) to run it and if anyone has any suggestions? I'm in NW London.
    Rob.
    ๐Ÿ’ฌ Gunwhale stringers.
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง Dave M ( Vice Admiral)
    โœง 49 Views ยท 1 Like
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    Hi Rob
    Just read this post and seen your profile details re this model.
    I believe you may have mis-typed the mAhr figure and think 5000 (5Amp) was your intention.
    Putting two 5amp batteries in series will double the voltage but the current capacity will remain at 5amp. Putting two batteries in parallel will double the amperage capacity but keep the voltage the same.
    Using a 500kV brushless at 19.2 volts could result in revs of 9600. Your motor is rated at 57amps with a wattage of 1350.
    The ESC should be fine but I suspect the batteries may struggle.
    A Wattmeter would be useful to check the actual current under load.
    Some pics on the water would be good
    Dave
    ๐Ÿ’ฌ Gunwhale stringers.
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง robbob ( Admiral)
    โœง 49 Views ยท 1 Like
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    Hi Boatshed.
    The motor is a Turnigy SK3 4250 controlled by a 90A boat ESC by Hobbyking, batteries are 2 x 9.6v 500mAh in series.
    This is a recommended combination by Vintage Model Works. incidentally the motor in my original 34" crash tender was a Taycol Supermarine.
    I would thoroughly recommend a brushless motor and a boat ESC to give you the reversing function.
    Fortunately there is a wealth of useful information about brushless motors on this site and I'm sure that someone more knowledgeable than me can advise you on the most suitable motor/ESC/battery combination for your boat.
    Mine has yet to have it's maiden voyage so I can't report on the performance but I'm quite confident that it will be a lot quicker than the one I built all those years ago !
    Rob.
    ๐Ÿ’ฌ Gunwhale stringers.
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง BOATSHED ( Lieutenant)
    โœง 49 Views ยท 1 Like
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    Hi, she's looking good, could you tell me what motor and esc are you going to put in her. I have a 46" that I acquired from a friend. I have taken the ic engine out of her and was going to go down the road of putting in a Taycol electric motor but I'm still unsure. All the KV on the new brushless I do not understand, I find it all confusing.
    I have got a Proboat Miss Geico she goes like a rocket.
    She has a brushless in her and I use lipo's in her.
    ๐Ÿ“ Chine stringers.
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง robbob ( Admiral)
    โœง 58 Views ยท 6 Likes ยท 5 Comments
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    The chine stringers are steamed and formed in the same manner as the gunwhale stringer, they are also laminated with the first set into a notch in the chine former. The bulkhead B1 needs to be bevelled so that the stringer lies flat in the notch. The stringers were drilled with a pin drill to prevent any splitting and epoxied and pinned to the chine former and bulkheads from fore to aft. The second lamination is done in the same way but this is glued and clamped with very few pins so that the stringer can be shaped to the bulkhead profile with no pins in the way, any pins used were punched into the lamination.
    Next I fitted the deck stringers that go between the bulkheads and fixed to the cabin sides, these are to support the decks, these are just glued and clamped.
    All the stringers and keel formers were then planed and sanded to the profile of the bulkheads in preparation for the fitting of the hull skins.

    ๐Ÿ’ฌ Chine stringers.
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง robbob ( Admiral)
    โœง 56 Views ยท 1 Like
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    Hi justintime2001
    I am pleased that my blog will be of help to you, I have found some invaluable advice and tips on this site and have been inspired to incorporate a high level of detail in my model to emulate the outstanding examples that I have seen here.
    It's a shame that the 'plans and docs' page for Fire Boats is hampered by very limited and poor content which other members seem to have access to by other means, something to do with copyright I understand.
    I hope that you enjoy the construction of you boat as much as I have....so far.
    Robbob.
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    ๐Ÿ’ฌ Chine stringers.
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง justintime2001 ( Leading Seaman)
    โœง 56 Views ยท 2 Likes
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    I have just ordered this kit. This blog is going to be so helpful to me as a newbie, thanks.
    ๐Ÿ’ฌ Chine stringers.
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง vosper ( Master Seaman)
    โœง 63 Views ยท 1 Like
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    Thats right Rob. I wish that I had tried to steam the skins on my boat before trying to fit them but due to the tight curve I ended up cutting the skins on the bow sections into three parts and reinforcing both inside and out of the hull with fibreglass. My wife is already asking what I want for Christmas, I quite fancy the Aerokits Sea Commander. Guess I`m hooked now.
    ๐Ÿ’ฌ Chine stringers.
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง robbob ( Admiral)
    โœง 57 Views ยท 2 Likes
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    Hi Vosper.
    Glad you're enjoying my build blog.
    I also have immensely enjoyed the construction process so far.
    Do you mean fitting of the skins at the bow section?.
    I'll be covering that shortly.
    Rob.
    ๐Ÿ’ฌ Chine stringers.
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง vosper ( Master Seaman)
    โœง 63 Views ยท 1 Like
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    I am enjoying your build and I am especially looking forward to seeing how you will fit the bow sections. I am in the process of painting my 34 inch fireboat. She is the first wooden model that I have built and I have thoroughly enjoyed the process.
    ๐Ÿ“ Cabin formers
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง robbob ( Admiral)
    โœง 58 Views ยท 6 Likes
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    ๐Ÿ’ฌ Add Comment
    The formers are positioned as per the drawings, the cabin sides marked with pencil line and pilot hole are drilled with a pin drill through the sides and into the edges of the formers. When the cabin formers are glued and positioned 15mm brass pins are easily pushed through the pilot holes into the edges of the formers with a 'pin push', no need for a hammer thus avoiding the possibility of damage to the still fragile assembly.
    The forward cabin sides need to be bent inwards at CF2 (wheelhouse) to meet the former and this is aided by the shallow cuts that I put in the cabin sides previously.
    As always everything is checked for square and clamps applied when necessary. The tow hook deck support is fitted to cabin former 5 and for good measure I also fitted a central supporting brace into which the towing hook will be fixed.
    Lastly the transom former CF6 is fitted and a stringer fitted to it to support the transom deck.

    ๐Ÿ“ Propshaft
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง robbob ( Admiral)
    โœง 61 Views ยท 9 Likes ยท 1 Comment
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    The recommended propshaft is 13" long with an 8mm outer tube and 5mm inner shaft. I purchased this from 'Modelboatbits' along with a nice little oiler clamp system, and a universal coupling with inserts to suit the threaded end of the propshaft and the 5mm plain shaft of the brushless motor.
    The recommended prop is a nylon two blade X50, again from Modelboatbits.
    The keel needs to be bored out to receive the propshaft and fortunately I have a 8mm wood bit that is long enough to go through the keel and through bulkhead B4 in one pass. The slot cut in the keel at an earlier stage helps guide the drill bit but still this needs to be done very carefully to maintain correct alignment and angle.
    I won't glue the propshaft into position yet, this will be done when the side skins are on and the motor mount and motor can be dry fitted and aligned properly.

    ๐Ÿ’ฌ Propshaft
    8 years ago by ๐Ÿ‡ฌ๐Ÿ‡ง vosper ( Master Seaman)
    โœง 63 Views ยท 1 Like
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    Are you on the night shift ? Carry on the good work, great job. ๐Ÿ‘
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