DUKW Scratch Builds

This section is for builds that are not strictly Tamiya or Heng Long. For instance, replacing the electronics from a WSN or Matorro, or even a scratch-build.

Postby Ecam » Sun Mar 27, 2022 1:59 am

It's going to be a little while until I get these started (M7 has to clear the bench first. Pictured are the 1/35 reference model, the roughly 1/16 (based on two of the HL trucks when they first came out). And the huge frame, axle and propeller kit that was offered by my brother. This may also be some of the first published pictures of Mike's work.

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In this picture the Priest is in showing the scale.

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Postby Model Builder 4 » Sun Mar 27, 2022 8:29 am

Following along with these builds Eric, this surely is an ambitious project especially the larger of the three, that one is going to be hugh as you say 8O :D have you calculated the length of that one yet ??? The 1/16 version should be approximately 21½ inches long give or take, are you planning on making them sea worthy ( or pond worthy :D ) now that would be a sight to behold :thumbup:

Cheers,Lee.
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Postby Ecam » Mon Mar 28, 2022 12:58 am

Big one (monster) should be about 40 inches. What is a duck that can't swim? Mike did a bunch of calculating and measuring 5 years ago when he started this project. I spent the first part of the morning calculating and intend only to add 3/8" to the wheel base. The width is set by the axles, tires are what they are so the wheelbase is about all I can change to get things as close as I can. I calculated scales of tires, track and WB and came up with an average scale of 1/9.25.

Couldn't resist starting a little. I intend on doing the two simultaneously, but the experiment to build the hull will fall to the 1/16th before the big one.

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Postby Ecam » Mon Mar 28, 2022 4:38 pm

A little of last night's work.

Eventually the hull top will be secured to the lower. So for access to the innards, the cargo deck, crew compartment and possibly the engine cover will be removable. This is all .060/1.5mm sheet, the ribbing underneath is simply for strength since most of the middle will be removeable. Some will need trimming as the lower and innards come together.

By the way, my 0.060 sheets (6x24") were remnants from a sign/graphics shop a friend gave to me. He said they usually end up in the trash can, so he saved me a couple weeks worth (around 50 of them). I have bought full sheets of styrene 4x8 feet at a plastic company/dist. in Denver. .080 was about $44 per sheet. So if you don't have a plastics distributor near you check with your local sign/graphics shop. FAR cheaper than the paper sized stuff available at the hobby shop.

I have used these styrene sheets for about seven years. It works with model, epoxy and super glues. I built a dash pod for a famous Honda S2000 here in the states known as the Big Bad Wolf. And a custom gauge pod for a custom truck (and to hide a hole in the top of the dash where the speaker used to be). Both have seen heat and the race car a bunch of abuse are are none the worse for wear.

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The triangles and double wall around the cab are filled with epoxy. Probably over kill, but one of the weaker parts of the hull when cab and cargo deck are out.

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Postby Ecam » Wed Mar 30, 2022 6:00 pm

Finished what I needed on the top hull. Did not intend to complete the cab as much as I did. As it worked out the cargo bed is held in place with the cab and it by the nose. So I needed to get most of it finished.

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And so the complex lower hull begins.

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Postby Kaczor » Thu Mar 31, 2022 6:51 am

Looks great so far :)
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Postby Herr Dr. Professor » Sat Apr 02, 2022 6:57 pm

I applaud the pedals, levers, and steering wheel, too! Though small, those add so much, even if they aren't such a challenge to you. Then, too, I would bet the tour promoters at Wisconsin Dells would highly approve of your DUKW. :haha:
Last edited by Herr Dr. Professor on Wed May 25, 2022 2:54 am, edited 1 time in total.
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Postby Ecam » Sat Apr 02, 2022 7:41 pm

The levers were really an experiment to see if I could make knobs. The black ones are melted sprue, the white is CA glue with a water spray mist to solidify and the clear ones are two part epoxy. The rods are from TIG welding wire that I have a bunch of. The levers shown are about a third (best) of the ones I made. Steering wheel is from a HL truck cab that donated the axles for this project.
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Postby Ecam » Tue Apr 05, 2022 4:30 pm

This was more complicated than I thought.

These are my exhaust pipe molds for the fender contours and propeller well.

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The brace between rear fenders is temporary.

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I'm not pleased with the nose yet. Working with 2D plans to make a 3D model when there are curves and angles is proving tricky.

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Postby Ecam » Wed Apr 06, 2022 5:51 pm

Got the rear suspension located and started on propeller well.

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Postby Ecam » Sat May 21, 2022 4:36 pm

It has been a busy Spring for me and not a whole lot of free time for tanking. But here is some of the progress I've made.

I've decided on an early version of the Duck for the 16th scale. The first 2000 (ish) had a vertical windshield, spare tire on the left side, goofy fold up on the windshield surf breaker and a few other details. It's the less pretty (ugly duckling). The bigger build will be the later (next 19,000 or so) which is a more attractive DUKW. Basically they built 21,147 of these in about 3 years. Along the way they made 500 changes.

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I've modified my original cargo bed to fit the early version. Its rise off the deck is even along its length. The later version is sloped up towards the rear as a rear surf guard. Which is what I first built, pictured earlier.

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I haven't done the ribbing in the center of the bottom because I'm still working out a water proof transfer case. I tried to be as accurate as I can to the actual hull. But depending on what I come up with there may be some hacking, so I left the ribs out for now. The white tubes on the drive shafts are simply guides for the driveshafts allowing the model to be rolled.

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Last edited by Ecam on Wed Jun 01, 2022 4:29 pm, edited 1 time in total.
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Postby Ecam » Sat May 21, 2022 5:17 pm

Oh, and if anyone knows of a more accurate tire/tyre to the WWII version I'd love to know about it. The wheels aren't too far off.
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Postby 971wright » Sun May 22, 2022 11:20 pm

Hi M16 Half track tyres are close, so are the 1/12 scale jeep tyres and wheels but you will need to make an adapter to fit the axels.Both are just a couple of millimetres out.

regards pete

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Postby Ecam » Mon May 23, 2022 7:31 am

Thank you for the information. Never ventured down this road. All help is welcome.
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Postby HERMAN BIX » Mon May 23, 2022 7:48 am

Im watching in awe Mr Ecam, not just this project, but all the others you have on the go too !!
Here on the Gold Coast we have a couple of these things operating as tourist rides.
They are BIG units, especially when they are navigating through Surfers Paradise :wtf:

You can be assured Im following this event along mate ;)
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Postby Model Builder 4 » Mon May 23, 2022 7:25 pm

I bought the set for my build from Germany ( AFV model ) they're not cheap when you need six of them but they do suit it well, you will also need to widen the rims or get someone to print a set as they are slightly under sized for the tyre, zoom in on the picture to see the tread pattern a little better, hope this helps :thumbup:

Cheers, Lee. ImageImage

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Postby Ecam » Sun Jun 26, 2022 7:31 pm

I have not forgotten this build thread....

Parts have been trickling in. I recieved two transfer cases and chose the one that will work best. Now I've ordered and am waiting on the drive shaft and prop shaft pieces. I will have to do some custom fitting on the drive shafts for length and to go from 5mm t-case to 3mm HL axles. I'll get some pictures up soon as I get the T-case installed.

Other inbound parts are a Flysky tx, two rx's, waterproof speed controllers and a variety of motors and gear reduction units. When all is in, should have the drive trains of this and the larger DUKW complete. I understand it is possible to run two speed controls off one rx by snipping the red wire from one of them. That would give separate control of the wheels and prop.

This does mean, the ducks won't be part of my no to low cost builds.......
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Postby Herr Dr. Professor » Sun Jun 26, 2022 11:21 pm

"[T]he ducks won't be part of my no to low cost builds..." Yes, but worth it... really worth it!

(I like the Flysky, even if my experience with aftermarket electronics is limited. I do wish, however, that I could remember in default configuration which was channel "1," which "2," etc. The manual actually never explains the simplest matter for simpletons like me. :haha: )
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Postby Ecam » Mon Jun 27, 2022 2:39 pm

Agreed, very much worth the effort and funds. My low/no cost is simply my attempt to show this hobby DOES NOT require huge funds to enjoy.
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Postby Ecam » Mon Jun 27, 2022 4:11 pm

Model Builder 4 wrote:I bought the set for my build from Germany ( AFV model ) they're not cheap when you need six of them but they do suit it well, you will also need to widen the rims or get someone to print a set as they are slightly under sized for the tyre, zoom in on the picture to see the tread pattern a little better, hope this helps.

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I did price those :crazy: WOW!

Thanks for the lead.
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