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Old Nov 30, 2012, 04:10 PM
Semi-Official Tinkerer
Subdave's Avatar
Rochester NY
Joined Mar 2005
821 Posts
Build Log
Boomin Beaver Helicopter Tug!

Well if that did not get your attention nothing will.


Well in my ultimate quest for the best rescue tug I have yet another master plan.
(Cue the evil laughter)
Although my Toot 14" logging tug worked out great and is extremely maneuverable.
It kind of morphed into a pulling tug.
I want something even smaller and more maneuverable.
My answer is I hope, a 12" version of a 14' Bronc tug.
That would make the scale 1/14.
Odd scale but since I am building more for size and function it is not a problem for me.

I have always wanted to build a Bronc as I think they are so homely they are cool!
Now where most Bronc's are driven by a Z drive in the bow. (Front wheel drive)
My plan is to use another drive system I have always wanted to try, a Voith eggbeater type.
I acquired an old Graupner unit a few years ago for another project but I want to use this system in pace of the Z drive.
I also will be using a bow thruster mounted in the stern.
So I guess it will be a stern thruster.
This should give helicopter like maneuverability.
The Voith will move the tug just like the main rotor of a heli as the Voith is just like a swash plate in the way it works.
The stern thruster will work just like a tail rotor.
I will set up the radio the same way.
In a normal Voith set up two drive units are used so the boat can spin.
But using the stern thruster like a tail rotor should do the same thing.
I am in the design stage now.
I found a set of plans I like.
I plan to construct the hull similar to how the real one is made, but where 1/4" sheet steel is used I will be substituting sheet fiberglass.
Great stuff that I get from McMaster in different sizes and thicknesses.

The tug is called the Boomin Beaver! I love it!
Hopefully I have it all worked out.
Time will tell. Dave.
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Old Dec 01, 2012, 07:30 AM
Semi-Official Tinkerer
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Rochester NY
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Here is the tug.
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Old Dec 01, 2012, 11:57 AM
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Rochester NY
Joined Mar 2005
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Here are some photos.
I designed and made a stern thruster.
I have a photo of the Voith drive.
And a photo of the drive parts sitting on a full sized plan of the tug.
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Old Dec 01, 2012, 12:39 PM
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Joined Dec 2002
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Should prove very maneuverable.

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Old Dec 02, 2012, 02:58 PM
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United States, CA, Orange County
Joined Aug 2011
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Rescue Tug

I have found that my LITTLE, 1/24th Truckable Towboat, works great. PLUS, it has two push knees, so it stays attached to what I am recovering, much better. The guy's in the club, think it works great, and my turning radius, is way under your boom boat. It's 12'' long, and only 5.5'' wide, weighs 3.75 lbs. I have not driven a better recovery boat yet! CaptCB
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Old Dec 02, 2012, 04:03 PM
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Rochester,NY
Joined Apr 2007
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what will that voith drive do to my conning tower when you run over my sub that you're trying to rescue? Greg
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Last edited by Greg W; Dec 02, 2012 at 04:04 PM. Reason: spell check
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Old Dec 03, 2012, 07:37 AM
Semi-Official Tinkerer
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Rochester NY
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Quote:
Originally Posted by CaptCB View Post
I have found that my LITTLE, 1/24th Truckable Towboat, works great. PLUS, it has two push knees, so it stays attached to what I am recovering, much better. The guy's in the club, think it works great, and my turning radius, is way under your boom boat. It's 12'' long, and only 5.5'' wide, weighs 3.75 lbs. I have not driven a better recovery boat yet! CaptCB
Very nice rescue tug.
But my Bronc should be able to spin on its own axis. Can't get much tighter than that.

Well Greg the tug actually sits quiet low in the water and will have a shroud around the blades.
The front pusher extends down as low as the drive as well.
So I don't think there is any extra damage potential.
Unless I add spikes like the real one instead of rubber pads.
I could actually put the hydraulic spike arm on the front and harpoon the subs and targets. Dave.
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Old Dec 03, 2012, 08:44 AM
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Subdave

That is the early drive, and they have TWO problems. One, they leak water into the boat, and two, the shafts are High Carbon Steel, and they rust, freezing up the unit. Changing the "C clips" on the blades, to SS helps. As does, using a PLASTIC FRIENDLY, waterproof grease. Most all of the tugs around here that had them, are long retired, or were switched to Z-Drives. CaptCB
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Old Dec 03, 2012, 09:22 AM
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If there's anyone who knows how to keep a model dry, It's Subdave.

D
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Old Dec 03, 2012, 10:28 AM
Woodfumbler......
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Copenhagen. Denmark
Joined Apr 2010
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Quote....This should give helicopter like maneuverability.
Ermmmm.... a helicopter moves in 3D a boat in 2 (U-boats in 2 D) so the question is can it fly?????
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Old Dec 03, 2012, 11:38 AM
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Quote:
Originally Posted by Sharky1dk View Post
Quote....This should give helicopter like maneuverability.
Ermmmm.... a helicopter moves in 3D a boat in 2 (U-boats in 2 D) so the question is can it fly?????
I am sure it could sink...
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Old Dec 03, 2012, 12:27 PM
Semi-Official Tinkerer
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Rochester NY
Joined Mar 2005
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Quote:
Originally Posted by Umi_Ryuzuki View Post
I am sure it could sink...
That is true!
Hhmmmmm!
But we prefer submerge to sink.

I guess I should have said helicopter like in its X and Y axis travel.

Thanks for the tip on the SS C clips. CaptCB

I did know about the leaking problem as when I got mine it was seized.
Very poor design on their part using the motor shaft bearing as a seal.
I toyed with trying to add an O ring but not enough room.
What I did was pack the bearing with Stuph and waterproof drive shaft lube.
I also sealed the motor mount flange with RTV.
Hopefully this will keep out most of the water.
I am fascinated with anything cool and unusual like the Voith drive so it is more an experiment.
I am sure the Z drive would be a better option for practicality.
But what is the fun in that! Dave.
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Old Dec 03, 2012, 01:12 PM
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United States, NY, Rochester
Joined Apr 2008
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Quote:
Originally Posted by Sharky1dk View Post
Quote....This should give helicopter like maneuverability.
Ermmmm.... a helicopter moves in 3D a boat in 2 (U-boats in 2 D) so the question is can it fly?????
Some of Dave's submarines have been known to fly... literally. Flying a tug should be no problem for him, particularly if he installs the usual brushless power plant.

Greg, your safest bet would be to just stay in port while SD is patrolling.
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Old Dec 03, 2012, 01:34 PM
r/c ships and workboats
bellingham, wa
Joined May 2006
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Interesting enough there are a couple of Bronks mthat do have mini Voith drives on them. Although the prefered method is a quick acting Zdrive system that makes theses things behave like a Texas tavern bull ride..... wild and better be hanging on!
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Old Dec 03, 2012, 04:56 PM
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Rochester NY
Joined Mar 2005
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Thanks Keith.
It is cool to know some of them do have Voith drives.
Must be the ultimate bumber car ride.
I started on the hull today.
I used 1/8" fiberglass sheet for the top and bottom.
The sides are 1/32" sheet.
I am using standoffs to keep the top and bottom in the proper place until I wrap the side sheets around and epoxy them. Dave.
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