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    40" Seaplane Tender, new build
    by jbkiwi ๐Ÿ‡ณ๐Ÿ‡ฟ ( Lieutenant)
    ๐Ÿ“ฃ










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    26 Posts 93 Comments 0 Photos 122 Likes
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    ๐Ÿ“ 40" Seaplane Tender, new build Y
    11 hours ago by jbkiwi ( Lieutenant)
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    Trying to finish by the end of the alphabet. Plumbing sorted, shaft oiler cans arrived today (very nice) and fitted, ESC on/off switches changed to toggle from slide, twin RXs (in the bow) and twin remote switches (lights and pump), steering servo fitted and hooked up ( by cable from in front of Stbd motor)
    Twin RXs required as the mini (self contained sound unit was getting back voltage from the REC the way it's plugged in ) - had other sound unit plugged in as well which is wired differently and has more options, but they were fighting each other and the mini would not start with sound OFF - (ran as soon as you turned the ESC on). Mini now has own REC.
    A bit more painting and trimming to do and wheelhouse fit out, but she's almost ready to throw in the water and see if she's a witch (ref Monty Python, The Holy Grail)

    Twin RXs
    Mini
    mini
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build Y
    11 hours ago by Martin555 ( Commander)
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    Hi JB,
    I must live a very sheltered life, it's the first time I have heard of using two receivers.
    Tell me more!
    I understand them both being on the same frequency.
    Do you get more channels or do they operate at the same time.
    I am interested to know if you moved stick one to operate channel one will that operate channel one on the second receiver ?

    Martin555.
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build Y
    4 hours ago by jbkiwi ( Lieutenant)
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    Hi Martin, you can use as many receivers bound to the same TX (2.4) as you have channels to use on them, ( ie, if you had a 6ch, you could use 2 x 3 ch RXs) or you can run 2 boats from the one TX (as I have - in this case the 2 RXs have full use of all the channels, ie rudder, throttle elev, aileron + switches) TX doesn't know there are 2.
    In the case of the 2 in the ST, the RH throttle (which connects from the throttle channel, through the sound unit then to the ESC throttle lead), light rotary sw, the pump toggle sw and the rudder are on one RX, and the LH throttle, with Y cabled LH throttle and sound unit 'throttle' plugged into the elevator / (now LH throttle channel - mode 1- TX converted to twin throttles)
    All channels still work but you can only plug in to one what you are not using on the other (unless as mentioned running in separate boats set up the same way. As clear as mud no doubt!? As I mentioned, I had to do it this way as the 2 different (both 'GT Power'units) sound units were not compatible on the same RX (different wiring set-up)
    JB

    RXs
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    ๐Ÿ“ 40" Seaplane Tender, new build X
    2 days ago by jbkiwi ( Lieutenant)
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    Nav lights, riding light, rear cockpit light all done and set to whatever I want to come on (riding light, cabin lights, cockpit light, nav lights, all lights etc) with a micro rotary switch, (with mahogany trim) in the rear cockpit. Lighting comes on with a remote switch. Made the nav light boards from mahogany and the rear cockpit strakes from stained hardwood.
    Re-arranged the plumbing to give a bit more room but the wiring was a mission to hide as each Neg from each set or single LED had to go back to the selector (plus 1 Pos feed) so it looks like spaghetti junction on the cabin roof. Also had to run a separate wire from the stern light to join up with the main loom in the cabin (both power and stern light connect by 2 JST connectors)
    Could have done away with a lot of bits by using my 9X TX, but would have had to convert it to twin throttles, but I still use that for planes. You seldom need the lights on as who runs at night.? I tried it a few months back with the HSL and had to steer by nav lights - bit scary - can hear it (twin sound units) but real hard to see. I did a video but you can't see much.
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build X
    2 days ago by Martin555 ( Commander)
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    Nice JB,
    I like the switch very clever. The lighting really brings the boat alive.
    Well done.
    It is probably a bit late now but I use wire wrapping wire for my LED lighting.

    Do you have any more information on the switch please.

    Martin555.

    boat
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build X
    2 days ago by jbkiwi ( Lieutenant)
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    Bit difficult to wrap wires Martin as they go in all directions and have to be hidden up pillars in the wheelhouse, through small holes etc. I just stick them all down with masking tape or hot melt and paint them all and you don't see them. Re the switch, I get them from our local Jaycar (Australian co - a bit like Dick Smiths used to be) electronics store. They are PCB mount rotary 10 pos switches with 6 pins on the back. Center 2 pins are POS feed and outer 4 pins are NEG . You just use 1 POS and the NEGs are all taken from the LEDs ( LED POS are all joined elsewhere, and to main power in) and soldered to the appropriate terminal, (a bit of experimentation required.
    The mini toggle switches I use for things such as replacing ESC on/off slide switches, lights pumps etc. The dip switches make cool miniature light switchboards (see pic of one in my Fairacre which switches Nav, riding light, front, middle and rear cabin lights separately) Hope this gives an idea. See if you can get into this, (ignore the payment bit and try downloading the free PDF catalogue (payment's for hard copy I think) https://www.jaycar.co.nz/latest-catalogues Makes interesting reading, hope it works in UK (I just downloaded it now).
    John B
    https://www.jaycar.co.nz/latest-catalogues
    ๐Ÿ”—

    LED POS
    LEDs
    hard copy
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    ๐Ÿ“ 40" Seaplane Tender, new build W
    7 days ago by jbkiwi ( Lieutenant)
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    Deck and cabin tops painted, grab rails done, mooring post, bow roller, fairleads and anti slip strips on engine boxes (wet and dry strips) done.
    To do, - tidy waterline, fit lights (remote switch already fitted) hook servo to steering rod, fit out wheelhouse and fit windows, (already cut), and fit cockpit strakes. Also have to fit upstands /internal coamings to keep any water out. I'll have to sort a way of locating the coamings, (probably wedges and pins, as the coamings drop down and slide back (about 40mm) into position.
    Getting there slowly.

    bow roller
    rod
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build W
    7 days ago by Martin555 ( Commander)
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    Very nice indeed JB,
    Excellent work,well done.

    Martin555.
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build W
    6 days ago by redpmg ( Warrant Officer)
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    Very good work as Martin says - amazing how much time one will spend on a subject one is passionate about . looking forward to seeing it on the water.......
    See I have been asking dumb questions - motors are 540's - what brand ? And the GT sound units self explanatory- googled them but no luck - sometimes Google SA a bit iffy

    motors
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build W
    6 days ago by jbkiwi ( Lieutenant)
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    Hi Red, if you get onto AliExpress (Alibaba) and just google Goolrc 540 and you should come up with a heap of them with different brands and manufacturers. They will all be made by the same manufacturer in China but re branded by on line hobby sellers (Gool RC being only one) You can get various winds in these motors which is good (fewer turns higher revs less torque, more winds slower but more torque)
    Some of the sellers have the turn Nos and RPM figures for them which is handy. You will have to look at a lot to find the best price as prices range from $11 up for the same thing. If you want to buy something, check sellers rating, sales Nos and reviews as well (good if it's up around 98-99%, - probably selling snow to Inuits, but been buying from them since 2010,-very few problems )
    Ali Express is pretty reliable (based in US) and will sort refunds if product is dud (even if the seller doesn't want to sort it, Al Ex will make them) If you get a free acct with them, it makes buying stuff easy. It's surprising how many people have not heard of Ali Express,+ Banggood and RC Echo (another similiar sites I buy stuff from,-not just model bits, although RC Echo (HK) is mainly models.
    Hobby King (Hong Kong) is just a rip off (was good 10yrs ago but too dear now ) and their freight prices are ridiculous, (most times more than the item which can be bought cheaper from AliEx or EBay etc with Free shipping) Bloody Australian bullshitter,-re-brands everything as theirs or made by them (don't know why, because we would buy stuff anyway if it was a good brand, (eg- they re-brand Castle Creations -USA, one of the largest electronics companies ESCs) If you look at the site - Made in China.com - you will find every manufacturer/ re seller in China and you will be surprised what you find there, which is claimed to be made by others. Happy hunting.
    John B

    Goolrc 540
    stuff
    motors
    models
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build W
    5 days ago by robbob ( Captain)
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    Hi All.
    I found this very interesting film on YouTube about the RAF Seaplane Tenders.
    Could be useful for accurate detailing and it's nice to see a fleet of them in operation.
    Shame that there's no commentary on the film though, which is unusual for Pathรฉ films.

    There's also a film about the RAF ASRL in action too....with commentary ๐Ÿ‘
    Robbob.
    https://www.youtube.com/watch?v=hJ8r0kqi174
    ๐Ÿ”—
    RAF's Newest "Arm" (1932)
    โ–ถ๏ธ
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build W
    5 days ago by jbkiwi ( Lieutenant)
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    Great film clips, thanks Rob. I've been looking at all the clips I can find on Youtube to do with RAF rescue boats, and I've found you can go right past something unless you are close to a name. A few letters can make all the difference between finding something or not. Took me about 18 years (looking on and off trying every combination of words I could think of) to find the original Thornycroft MTB 49 photos (Vic Smeed model plan of this boat, which I built) and only found it on a UK model mouldings website by sheer luck, as I was looking round the site for something else! Now you type in MTB 49 and it comes up everywhere as someone has uploaded it from the Museums files and it's become common. Probably search engines have become smarter as well.

    boat
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    ๐Ÿ“ 40" Seaplane Tender, new build (V2) sound units
    10 days ago by jbkiwi ( Lieutenant)
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    These are the twin GT Power sound units in the ST. The volume is turned down on one unit as you can hear on start up and end of the vid.
    Seaplane tender RC, sound demo
    โ–ถ๏ธ

    GT Power
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build (V2) sound units
    10 days ago by Martin555 ( Commander)
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    Very nice I love it.

    Martin555.
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build (V2) sound units
    9 days ago by Carlos ( Able Seaman)
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    Hi here is 1502 a seaplane tender i actually work one in the Historical Navy base in portsmouth i work as a volunteer repairing these classic boats .i had just finished repainting her and we are lowering her back into water.
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build (V2) sound units
    9 days ago by jbkiwi ( Lieutenant)
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    Hi Carlos, Lucky bugger, what a great job! I was in the RNZAF marine section for a short while while they were still using the STs for target towing for the new (at the time) P3b Orions). I wanted to stay there but they wanted me to go back to training for aircraft engines. We still have 3 or 4 STs left in NZ (including one running, one being restored and a locally built one in the RNZAF museum). Assuming 1502 is the MK 2 wider hulled version? Think I saw a story on her restoration somewhere.

    STs
    version
    Orions
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    ๐Ÿ“ 40" Seaplane Tender, new build (V1)
    10 days ago by jbkiwi ( Lieutenant)
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    These are the twin GT Power sound units in the HSL (can't put 2 links in the same post)
    ASR HSL RC sound demo
    โ–ถ๏ธ

    GT Power
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    ๐Ÿ“ 40" Seaplane Tender, new build U
    11 days ago by jbkiwi ( Lieutenant)
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    Cabin partly painted, (tops to paint), mast painted with LED riding light fitted. Second sound unit turned up and both now fitted and working, (with as near as I can find to Detroit 4-53s as fitted to this boat, in the programmed choices). Inner hull in cockpit and some interior painted and steering servo fitted. Props painted bronze (art acrylic metallic).
    Still waiting for shaft collars for the motor end of the shafts and some nice little shaft oiler cans (far easier than trying to make them). They have arrived in the country so shouldn't be too long. Off to get some paint tomorrow for the cabin tops and deck, also I have to fit the cockpit side battens which I've already stained and cut. Once the cabin's painted I can fit the windows and grab rails as the stanchions have arrived from CMB.
    Going to make a quick vid later, showing the sound units operating etc. Still have bow roller and a number of smaller details to go, such as tidying the waterline with a black boot topping and making the name decals (if my printer stops mucking about, - almost time for a new one)! Also have to do the nav, cabin and stern lights, ( have ordered a small adjustable voltage reg to adjust lights. Remote switch for lights is already fitted.

    cockpit side battens
    boat
    shaft oiler cans
    shaft collars
    printer
    bow roller
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build U
    11 days ago by Martin555 ( Commander)
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    Very nice indeed,
    Keep up the good work.

    Martin555.
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build U
    10 days ago by mturpin013 ( Lieutenant)
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    JB, any detail on the sound units I haven't seen this type before - provider, cost, etc
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build U
    10 days ago by Rookysailor ( Chief Petty Officer 1st Class)
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    As mturpin13 posted, would also like info on your sound units, also the choice of engines.๐Ÿ˜
    btw, love the boat....

    boat
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build U
    10 days ago by RNinMunich ( Fleet Admiral)
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    I'll second that Michael and Rooky,
    I've got a few Sound Module kits but most use digital sounds and sound too synthetic.๐Ÿค”๐Ÿ™‰
    Some allow storing of wav or mp3 files of real sounds - if you can find something suitable, but then it's not linked to engine speed ...โ˜น๏ธ OK for sirens, bells, SONAR and MC-1 commands etc though๐Ÿ˜‰ Cheers, Doug ๐Ÿ˜Ž
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build U
    10 days ago by jbkiwi ( Lieutenant)
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    Hi MT, sound units are actually for cars but have a choice of 58 sounds from V8s to diesels and are the only ones I've seen which seem to sound ok. You have to go through all the sounds and try them through the throttle range but there are a number which sound ok for boats. You can also plug them into your computer and make a few changes such as throttle sensitivity, turbo sound and volume etc.
    The sounds are proportional, from starting to full throttle and are all WAV sounds which seem to be split up into small 'samples' and as such, some are not quite linear but are useable.
    There are 2 different models, One is the 'GT Power' sound and lights model - version 2 (the better I think) which comes with all the pre wired and plugged LEDs needed for a car, (h/l, t/l, indicators etc) and comes as a module and separate speaker, (you can plug 2 speakers into this module for better sound). The other model is the 'GT Power' Car Engine Sound 'mini' which is just the sound module and speaker in one box.
    This works the same as the version 2 model but at present I'm having a problem with the Mini, which has the wrong model for USB adjustment installed, (sounds can be selected manually on the module but when you plug the module into the comp and open the module control panel, it's for the wrong model, - sound files are still viewable though) I'll have to contact GT Power for a fix (going by their on line help page, they seem quite ready to sort problems out and give solutions)
    Cost is around $56 NZ for the version 2, and around $ 51 for the 'Mini' version which is comparable to most other sound units available, but with more features than some. Apparently, if you send the GT Power tech/help guy a complete WAV sound file (ie, start, idle, and steady slow acceleration to full and back they will make a sound file for your unit and email it back to you,(yet to try but would be brilliant if true)
    Units are sold on Ebay, Ali Express and Banggood (and many other model shops) and it's worth shopping around all of them, as there are big price differences. These are also sold as GOOL RC sound units but are made by GT Power. ( http://www.gt-rc.com/en/msgBoard.jsp ) You will see the home page on there.
    I use a number of their products such as battery chargers, rev counters, battery checkers etc and all seem very reliable and work well. I don't think they sell direct, but they are sold everywhere.
    For Rooky Sailors benefit, the motors are Gool RC 540-45T 7.4V brushed car motors which have ball bearings and replaceable brushes (motor is rebuildable). Haven't tried them on the water yet, but the 45T (12000rpm) should be tourqy enough (different turn Nos are available)
    John B
    http://www.gt-rc.com/en/msgBoard.jsp
    ๐Ÿ”—

    ones
    One
    cars
    Mini
    computer
    models
    model
    module
    version
    car
    LEDs
    sound units
    products
    battery checkers
    motors
    brushes
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build U
    10 days ago by jbkiwi ( Lieutenant)
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    Hi Doug, going to have a bit of lunch then try and do a few sound demos on a vid. The sounds aren't perfect but if you find the right throttle spot they can sound quite good.
    John B
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    ๐Ÿ“ 40" Seaplane Tender, new build T
    17 days ago by jbkiwi ( Lieutenant)
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    Aerial masts made and wheelhouse ribbing on. Acetate windows cut out (require painted trim around boarder (time to get out the BIG glasses) Tried the shafts out, wasn't expecting much and wasn't disappointed. Shafts are stainless but are soft, and look to have been turned, instead of being made of straight wire. Wondered why everything just about jumped out of the boat at high revs, turned out to be the shafts which looked like pretzels and were throwing themselves out by miles.
    Took them out and tried to roll them on the bench top, -ever tried to roll a banana?!. Managed to straighten the worst one about 90% but it was impossible to get it dead right as it had a spiral built in (quality Chinese machining). The bearings are crap as well and 'snatch' quite often (probably soft balls and slack clearance) but I'll replace them with some better quality NMB high speed ones if they don't last, and make shafts from 4mm silver steel or straight wire.
    The complete shafts didn't cost much (no more than the brass tube alone required from the LHS) so I'm not too worried. If I'd had a lathe I would have made my own with teflon bushes. The shafts would be fine on a slower revving model (0-5000rpm maybe) but they start flexing at around 8,000 (no load) where it all goes banana shaped. I've also removed the heat exchanger I fitted as I was running out of room for more important gadgets like sound (Just did it as an experiment, nothing serious (I'll do a quick sound demo vid soon, works well)
    When my lungs recover from 3 weeks of the black plague I'll paint the coamings and fit the windows, (still waiting for my grab-rail stanchions from CMB). Will make a start on the wheel house fitting out when I get time (need to find a wheel etc, -might have to haunt the toy stores).

    pretzels
    lathe
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build T
    16 days ago by Martin555 ( Commander)
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    You are doing a great job JB keep it up.

    Martin555.
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build T
    16 days ago by mturpin013 ( Lieutenant)
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    Good quality Silver steel is the way to go, emphasis on "Good Quality" steer clear of Chinese
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build T
    16 days ago by jbkiwi ( Lieutenant)
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    MT, do you think toughen it or leave it as it comes? perhaps chuck it in the oven for a while maybe and oil cool it ? Probably don't need glass!.
    Used to use a big diamond Rockwell tester while spring making (about the size of a benchtop mill), now they almost fit in your pocket!.
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build T
    14 days ago by redpmg ( Warrant Officer)
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    Hi JB - tried black nylon for the water end bearing ? - lubricated by water - the cheap 2mm propshafts have them fitted both ends - so you could rob one of those and drill out to size carefully. File it down by hand if you have a smaller outer tube - or insert in a variable speed drill and use a file that way . NBG for the inner bearing however - big problem with friction/heat - there are small roller bearings available via the internet - be much better than ball bearings.
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build T
    13 days ago by jbkiwi ( Lieutenant)
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    Hi Peter, always used nylon, Teflon or brass bushes in my IC boats and they lasted for years but these shafts were cheap so I bought a few. Seems the main problem is the shafts are stainless and seem very soft, (and as mentioned, not straight) and once they get to a high speed they are whipping and going out of shape, (I've managed to straighten the worst one and it runs much better). Thought about bunging a nylon bush in the center of the tube to stop that but I'll wait and see how they go once filled with oil and have a load on. Bearings appear to be a stepped 8mm outer and 4mm inner so I'll see what NMB has (either ball or needle roller).
    As you mentioned the rollers would be better, (my friend used them in his Hydro about 35 yrs ago and swore by them,- they were bearings used in dental drills) If they are no good as is I might make the shafts from silver steel ($10/m length - just priced it) and chuck some decent bearings in. Haven't tried a file on the bearing outer yet, that will give an idea of the bearing quality.

    needle roller
    outer
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build T
    10 days ago by mturpin013 ( Lieutenant)
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    Sorry for late reply, I would definitely leave it as supplied, its already tougher than stainless and any heat treatment will almost certainly cause some bending in a piece as long as a prop shaft. So I just tread it, again very carefully using the screws on the die stock to open the die fully on the first cut, making sure you use a good quality cutting oil.
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build T
    10 days ago by jbkiwi ( Lieutenant)
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    Thanks for that MT, that's what I thought re the hardening, and was thinking about distortion,- hence my question. I have used silver steel many times for various items ( + hardening it) but have never tried it in such a small diameter for an application such as a shaft. I've managed to get these a bit straighter by rolling and tweaking them but I'm not happy with the soft stainless. I've got them down to around .01mm but the clearance in the bearings (and shaft to bearing) is also contributing to the noise. When it's all ready to go, I'll fill them up with oil and see how they run.
    John B
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    ๐Ÿ“ 40" Seaplane Tender, new build S
    20 days ago by jbkiwi ( Lieutenant)
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    Just thrown some paint at the hull (sides and bottom 'anti fouling'), fitted the deflectors on the cabin tops and drilled the rear small port hole. Also have drawn up the name template to make the waterslide decal. I can start fitting the shafts and rudders now. Will flat off the 'antifouling' as it's a bit glossy at the mo.
    Also, my 'GT Power' sound unit turned up and I've managed to find a suitable sound near enough to the Detroit 453s the original had fitted (unit comes with 58 car/truck sounds installed). With this sound unit you can record a sound, send it to GT Power and they will make a file and send it back so you can download it to the unit via USB (or so the guy says) Might give it a shot.
    I'm not using the LEDs supplied (for lights, indicators etc but could use a couple for reverse and forward, (you can program a few things via USB) You can add sirens/horns etc as well. Have another one coming which is the new one piece model, (they even do a bluetooth one which can be phone operated/adjusted by an app) Gives the model a bit of 'sumpin' xtra. (nothing to do with certain Thai 'women' for those who were thinkin' ๐Ÿ˜œ!)

    model
    bluetooth one
    GT Power
    app
    LEDs
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build S
    20 days ago by Martin555 ( Commander)
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    Looking good JB,
    Keep it up.

    Martin.
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build S
    20 days ago by RNinMunich ( Fleet Admiral)
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    "Just thrown some paint at the hull ..."
    Pretty good aiming JB ๐Ÿ‘

    "certain Thai 'women' .." Well really JB ๐Ÿ˜ฎ
    Chicks with ****s!!??๐Ÿ™„
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build S
    20 days ago by jbkiwi ( Lieutenant)
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    Ta Doug, still have to tidy up the waterline with a black 'boot topping' but we're getting somewhere. Just have to blow the grease out of the shaft tube ends (was to stop the acrylic paint getting in the bearings) and I can bung the shafts props and rudders in. Might make a few deck fittings today, although the bad case of Ebola I have is slowing me down at the moment. Need to get over to the model shop to get some brass rod to make the 'T' cleats.
    My grab rail stanchions haven't turned up from CMB yet but I only ordered them on the 20th, and they are coming by Royal Snail, so probably a few weeks yet. Most things take a month to get here and a week to come from the airport to me (only 62km or 1hr 20mins away across Auckland!)- changes couriers 2 or 3 times in the process.
    Re chicks with 'accessories,' you'd have to be careful on holiday in T land, imagine the surprise of finding out she's carrying more than a handbag!๐Ÿ˜ฎ
    John B

    accessories
    handbag
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build S
    18 days ago by mturpin013 ( Lieutenant)
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    Just picked up on this blog, somehow missed it but very interesting
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    ๐Ÿ“ 40" Seaplane Tender, new build R
    27 days ago by jbkiwi ( Lieutenant)
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    Most of the motor electrics fitted (just rudder servo and lights to set up yet.) Sprayed a few coats of heavy acrylic undercoat on and sanded back. Will spray another coat or two before top coat. Weather was good for painting today, so set it up and sprayed it outside in the sun.
    Both motor covers are now glued to the bulkhead so the coamings come off as one piece as previously mentioned. Made a Mahogany door for the aft cabin and will probably do the same for the internal door from the wheelhouse.
    Faired the shaft tubes as well with some West System resin and filler powder.. Gets a bit more exciting when you can start painting. May give the coamings a spray yet, but need to make sure I don't need to correct anything.
    Ordered the grab rail stanchions from CMB, also another sound unit from Ali Express. I have dozens of coloured LEDs for the lights (miniature Xmas string lights) which I bought on
    an end of year sale which are perfect for nav and interior lights (just cut off what you need and solder on some leads). They seem to handle the voltage ok . The clear ones I usually paint dark yellow to get a more realistic colour, and power them with a small 2 AA battery compartment (which comes with the lights) which is wired to a remote switch.
    Haven't done a lot the past week as I've had a bad case of the plague and I'm just getting back into things.

    powder
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    spray
    Mahogany
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build R
    27 days ago by Martin555 ( Commander)
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    Hi JB,
    Now that you have been able to splash a bit of colour on her I bet you feel as though you are finally starting to get somewhere.
    Keep up the good work.

    Martin.

    Hi JB
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build R
    27 days ago by jbkiwi ( Lieutenant)
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    Starting to see a bit of light Martin, Once the hull is painted it will be pretty much ready to run/ check W/L etc. Still have windows, wheelhouse detail, lights, internal painting etc which is not too big a job. Middle of winter so waiting to paint (or for paint to dry) wastes a lot of time.
    John B
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    ๐Ÿ“ 40" Seaplane Tender, new build Q
    1 month ago by jbkiwi ( Lieutenant)
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    Trying out the heat exchanger and raw water pumps. Vid is a bit boring as you can't see much going on other than the water coming out the exhausts. I left a bit of air in the closed cooling system so I could see if the water was circulating (you can see a few bubbles travelling around,-not in the vid unfortunately) Everything works well but the circulation pump is a bit noisy (running on 8v) but the main pump is quiet (running half speed on 6v - through a UBEC ) Both pumps are powered from a 2200Mah 2s LiPo at the stern, under the cockpit floor and operated by a remote switch. Main pump draws water from a pickup near the stern.
    R/C 40" Seaplane tender. Heat exchanger for brushed motors.
    โ–ถ๏ธ

    pickup
    2200Mah
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build Q
    1 month ago by Martin555 ( Commander)
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    Hi JB,
    How do you plan on bleeding the air out of the closed system ?

    Martin.
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build Q
    1 month ago by RNinMunich ( Fleet Admiral)
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    "I left a bit of air in the closed cooling system .... the circulation pump is a bit noisy"
    Could that be contributing to the pump noise John? Cavitation when the air bubbles get to the pump perhaps?
    Doug ๐Ÿ˜Ž
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build Q
    1 month ago by jbkiwi ( Lieutenant)
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    Nah Doug its a perestaltic / dosing pump (like an R/C plane refueler - 2 rollers on a silicone tube u bend, crude but effective but also noisy, the main pump is a diaphragm pump which I also have in my HSL and is very quiet. I'm only running the main pump on 6v because it would be a jet boat on 12v.
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    ๐Ÿ’ฌ Re: 40" Seaplane Tender, new build Q
    1 month ago by jbkiwi ( Lieutenant)
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    Hi Martin, I've filled it up to the top with a syringe but the small bubbles are good for an indicator as you can't see any movement otherwise. I could just make a small header tank, (or even a bit of the large silicon tube mounted vertically on a T and it would bleed itself. I'll see if it gets hot, and if so I'll probably make a small tank for expansion so it doesn't pop the hoses off.
    There is good circulation all round so hopefully it won't be an issue, I certainly won't be racing it, (it's getting heavier by the minute - coming up on 6lbs and with paint and batteries probably a shade over.) It will need the weight to make it sit properly as the hull was only about 1 3/4 lbs . It will be interesting to see how these motors perform, these are 6v 45T but I can always go to 60T or 12v for more grunt. The combinations are endless!

    syringe
    motors
    batteries
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