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Old Nov 29, 2009, 07:03 PM
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Dukw

I've searched the forum but have not found any really helpful threads.

Has anyone here built one of the DUKW amphibious trucks? Or maybe the Ford Seep Jeep...

What did you use for propulsion? steering?
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Old Nov 29, 2009, 07:20 PM
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I used to have a DUKW build on Geocities, but they shut down... maybe I'll get around to redoing it here.

I scratch built the axles (4 whl drive including steering linkage), while the prop was driven through a 3:1 gearbox.

CG Bob built the Deans Marine kit... they have a list of parts from the RC trucker guys.
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Old Nov 29, 2009, 07:34 PM
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Great DUKW Pat! How did you scratch build those axles?

How many channels did you have? One for land drive, land steering, water drive, and water steering?

Too bad you don't have a backup of that site, I'm probably going to ask you so many questions!!
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Old Nov 29, 2009, 07:39 PM
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2-1/2 ch. Traxxas radio.. flip a switch to run a servo which toggles the ESC to one motor or the other.

All scratch built... it's nice to have a lathe (nicer if I had a mill too). Hull was scaled from an Italeri plastic kit.
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Old Nov 29, 2009, 08:04 PM
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Here's my build log on the Dean's Marine DUKW.
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Old Nov 29, 2009, 08:47 PM
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Thanks for the info Pat. I don't have the tools to do metal machining, so i'll need to do some kind of stock axles. The rudder and front tires were linked full time? What is the performance like on land and in the water?

Nice looking DUKW CG Bob! I like the skirts on the wheel wells.
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Old Nov 29, 2009, 09:29 PM
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Quote:
Originally Posted by daemuon View Post
The rudder and front tires were linked full time? What is the performance like on land and in the water?
Yes. Two servos Y'd together in my case.

Performance? Fine, just like the original:
"She's not very fast, but she's better in water than any truck, and she'll beat any boat on a highway!"
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Old Nov 29, 2009, 09:42 PM
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Only vehicle to use in hurricane waters.

Rich
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Old Nov 30, 2009, 07:48 AM
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pat about how much do you have into your lathe setup? if i buy the axles it looks like i'd be into it about $1000!!! if i go 6x6. even if i go 4x6 it'll be a good amount of change.

cyclops2, luckily we don't get many hurricanes around here...

cg bob, i saw your dukw in your thread about dean's marine dukw. what drive system did you use?
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Old Nov 30, 2009, 12:38 PM
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I bought the kit from Loyalhanna Dockyard, and used their recommended drive systems. The motors are MFA/Como 12V units with a gear box. IIRC the propellor drive has a 6:1 reduction and the wheel drive motor has an 11:1 reduction. I used the recommended Robbe differentials, two for the rear wheels and a steerable unit for the front wheels.
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Old Nov 30, 2009, 01:06 PM
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With a few extras, I probably have $500 in... and really need a mill to do good work. All useful if you intend to do lots of this kind of work... and what a great project to learn on!
Search on "lathes" in these forums, lots of previous discussion.
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Old Nov 30, 2009, 02:44 PM
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Like the DUWK photo from Seattle where the take you out on Lake Washington as part of the tour and give every one a duck quacker ( kazoo ) to quack with on the tour.
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Old Nov 30, 2009, 04:02 PM
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Still have my quacker...
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Old Nov 30, 2009, 04:07 PM
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One thing to watch for- climbing out takes a lot of driveline torque, so design accordingly. I use a 50:1 drive unit with a Speed 400 in place of the stock MFA Como motor, and I can't keep the cog belt from jumping in this maneuver. If I could fit them in, I'd use cogs of twice the diameter to reduce the belt tension for the same torque.

Also would be neat to have authentic bar tread tires... these airplane tires have no grab. No one makes them though. I can't climb out on a beach, but I can at the local pool, where they have a shallow pebbly concrete ramp in the kiddy pool...
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