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Author Topic: RAF HSL whaleback in 1/16th  (Read 15697 times)

tghsmith

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RAF HSL whaleback in 1/16th
« on: August 30, 2016, 11:36:29 PM »

years back I built this boat in 1/24th with a set of plans and basic tools, have posted the work so far on the thread for this class of boat, decided to start a build thread of its own.. today the double planked 4ft hull was cut free of the building board..

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Capt Podge

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Re: RAF HSL whaleback in 1/16th
« Reply #1 on: August 30, 2016, 11:47:47 PM »

Wow, that woodwork looks impressive, I'll follow your build and hope to pick up some tips along the way. :-)

Regards,

Ray.
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Pop top campervan needed

Perkasaman2

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Re: RAF HSL whaleback in 1/16th
« Reply #2 on: August 30, 2016, 11:53:23 PM »

You have made a lovely job of the hull. :-))
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gra2

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Re: RAF HSL whaleback in 1/16th
« Reply #3 on: August 31, 2016, 11:02:13 AM »

Hi,
One of my favourite boats.
Hull looks great.

Gra2
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gra2

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Re: RAF HSL whaleback in 1/16th
« Reply #4 on: September 01, 2016, 05:40:12 AM »

Hi I hope you don't mind have posted a shot of my Whaleback.
Same scale as your build.



Graham
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Charlie

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Re: RAF HSL whaleback in 1/16th
« Reply #5 on: September 01, 2016, 12:09:58 PM »

That planking looks very neat. What timber and glue are you using?


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tghsmith

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Re: RAF HSL whaleback in 1/16th
« Reply #6 on: September 01, 2016, 11:46:38 PM »

thin 1/8th" ply framing, basswood 1/32nd" for double planking,hard balsa blocking, superglue and titebond III wood glue,, with the help of homemade half round scraper the stringers were reduced, blocking fared and other uneeded interior wood removed, after sanding a entire 2oz was removed but that means the first 2oz of epoxy are free weight.. plans are to make her as the 180 out of Gorleston in late war fit (well armed and well worn)

stringer reduction

1/24th vs 1/16th..
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tghsmith

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Re: RAF HSL whaleback in 1/16th
« Reply #7 on: September 04, 2016, 05:47:06 PM »


hull interior has been cleaned up and epoxy coated..  starting on exterior hull and deck..
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tghsmith

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Re: RAF HSL whaleback in 1/16th
« Reply #8 on: September 15, 2016, 06:50:09 PM »

deck with cabin and hatch openings framed, 1/32nd plywood sub-deck fitted and with the help of a few clamps, weights and other objects glued into place,, outer hull sanded and giving a penetrating coat of resin, after another round of sanding it will be glass and resin time..



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tghsmith

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Re: RAF HSL whaleback in 1/16th
« Reply #9 on: September 17, 2016, 06:00:14 PM »

hull sanded, mixed some epoxy filler paste and filled seems, divots and gaps.. after curing used a 5inch orbital sander to bring everything down to a point where the hull can be glassed, some final hand sanding is still needed.. (working big is fun) started on the deck planks until my spray can of superglue kicker emptied..
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tghsmith

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Re: RAF HSL whaleback in 1/16th
« Reply #10 on: September 21, 2016, 03:55:12 PM »



planking done, penetrating coat of epoxy applied.. time to glass the hull and start main cabin construction..
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goingdown

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Re: RAF HSL whaleback in 1/16th
« Reply #11 on: September 21, 2016, 09:50:26 PM »

Lovely piece of work :-)) .  It will almost be a shame to paint it.
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tghsmith

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Re: RAF HSL whaleback in 1/16th
« Reply #12 on: September 29, 2016, 11:27:46 PM »

work started on the plug to make a mold for the cabin.. getting close to starting to sheet this section.


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Charlie

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Re: RAF HSL whaleback in 1/16th
« Reply #13 on: September 30, 2016, 09:36:13 AM »

I would imagine you would need to keep the weight down on a high-speed craft like this. What is the target maximum all-up weight for the finished boat that you need to achieve? I'm loving all that diagonal planking, superb :-)

tghsmith

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Re: RAF HSL whaleback in 1/16th
« Reply #14 on: September 30, 2016, 11:25:32 AM »

Way back I spent several days dremeling out hull-cabin and hollowing out fittings on my 1/24th so it would ride correctly and get up on plane.. calculations for the new boat says 10-10.5 total.. with this concern the cabin will be a thin fiberglass balsa sandwich (after I get the mold made) the use of 3D printed parts for many of the fittings and crew should help keep the weight in check(20mm, Vickers machine guns, vent cowls,searchlight) brushless motors and new battery tech will help greatly..
 
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tghsmith

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Re: RAF HSL whaleback in 1/16th
« Reply #15 on: September 30, 2016, 11:06:20 PM »


sheeted the regions that curve in one plane with thin ply, the tougher curves were covered with narrow planks.. sanding, filling and more sanding needed to get the plug ready..
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gra2

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Re: RAF HSL whaleback in 1/16th
« Reply #16 on: October 03, 2016, 06:13:52 AM »

Hi Tod info you asked for attached.



Graham
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gra2

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Re: RAF HSL whaleback in 1/16th
« Reply #17 on: October 03, 2016, 06:24:54 AM »

Motor is a Turnigy 3648 inrunner motor 1450kva.
I run on the centre shaft only, flank props are freewheeling.
Boat runs on a three cell lipo which gives more than enough power.
Runs just as well on a two cell lipo.



Motor mount made from plywood faced with 1/8 inch alum as heat sink have also curved alum tube around front of motor which is watercooled.

Graham
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canabus

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Re: RAF HSL whaleback in 1/16th
« Reply #18 on: October 03, 2016, 08:25:23 AM »

Hi fellows
I am using one of these 3648-1450kv motors on a 60Amp car ESC with a 40mm 2 blade prop.
Using a 5800mah 3S Lipo the speed of your boat will not be a problem.
I have run this motor with a 3 blade 37mm prop, but ,it only used more amps and did not go any faster.
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gra2

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Re: RAF HSL whaleback in 1/16th
« Reply #19 on: October 03, 2016, 09:19:37 AM »

Hi made a mistake in my post it should say Outrunner motor not Inrunner.

Prop I use is 36mm three blade brass.

Graham
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canabus

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Re: RAF HSL whaleback in 1/16th
« Reply #20 on: October 03, 2016, 09:35:26 AM »

Using a 2S the revs are about 10000, 3S the revs are about 16000 and 4S 21000.
This turns these motor from mild to beastly!!!
Yes I tested it on 4S, but, the solid ply 34" Sea Commander was not built for speedboat speeds!!!
I have removed the motor and installed 3548/4 1100kv which is still over speed.
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tghsmith

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Re: RAF HSL whaleback in 1/16th
« Reply #21 on: October 03, 2016, 01:55:25 PM »




my current plan is 3 24-28mm 900-1200kv out-runners, 3 battery packs (to be decided) 3 ESC.. I'm in the planning stages of converting a transmitter to 3 slides with center detent for the trottles.. this was in the works already for my 1/96th scale USS Minneapolis (C-13) also the triple screw..


have to admit its fun working in a large scale for a bit..
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tghsmith

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Re: RAF HSL whaleback in 1/16th
« Reply #22 on: October 03, 2016, 09:39:58 PM »

  filled,sanded and primed.. ready for more sanding ,filling and priming (but, I got to use my 5inch disc sander)
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canabus

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Re: RAF HSL whaleback in 1/16th
« Reply #23 on: October 04, 2016, 06:21:45 AM »

The 28mm motors only run 3blade 30mm props, but 35mm motors will run 37mm props(eg 3639-750, 3648-850, 3639-1100).
Depends on what prop sizes you are planning for the boat.
This requires three ESCs and maybe a throttle/rudder mixer for the outer motors.
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tghsmith

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Re: RAF HSL whaleback in 1/16th
« Reply #24 on: October 04, 2016, 01:32:57 PM »

the scale props are prop shop v1212 just a tad under 30mm and not a racing pitch, was looking at something in this range for motors
http://www.hobbyking.com/hobbyking/store/__18968__Turnigy_D2836_9_950KV_Brushless_Outrunner_Motor.html looking to get scale speed and trying to stay away from water cooling.. planning on the vent cowls to be functional and mounting a exhaust fan below the open engine room hatch(possible ducts to pull air through motors) the ESC's come with fans,,
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