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Post by Garf on Jul 26, 2004 20:10:25 GMT -7
I have been working on rectangular steel clunk tanks for some time now. I had one in a large profile model at the 97 NATS. It works perfectly. It gives me my best runs and allows me to fill the tank with whatever amount of fuel I want and still draw fuel. This combined with a vent plumbed right behind the prop works better than anything else I have. It would seem to me that it would allow the maximum amount of fuel in any given compartment.
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Post by fox4ever on Jul 27, 2004 2:46:41 GMT -7
Hi Garf, How bout a drawing. I would like to see how it is done. Thanks Lee
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Post by Garf on Jul 27, 2004 19:45:04 GMT -7
I'll have to dig around to find some drawings someone did for me on this thing. May take a while.
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Post by Garf on Aug 1, 2004 16:31:06 GMT -7
These drawings were based on basic information related to Tim and are not deadly accurate. They will give a general idea of my design. This works best with longer tanks. The first one used an old C/L rat racing tank. The second used a Perfect Rectank. They work better then they have a right to. They have eliminated all the tank related problems I have had.
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Post by zekemccoy on Aug 1, 2004 18:05:36 GMT -7
What's the flexible clunker tube made out of? and do you put hose clamps on it to prevent slipping off?
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Post by fox4ever on Aug 1, 2004 18:11:20 GMT -7
Thanks for the drawings. I think I can make one of those and give it whirl. (no pun intended) Lee
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Post by Garf on Aug 1, 2004 18:51:44 GMT -7
The clunk is right out of an R/C tank. You need to use thinwall silicon tubing for flexibillity. I don't use clamps, and I have yet to have a line come off. If you crash, the clunk can end up in the front of the tank. It can even puncture the front wall of the tank (see pic). The original setup was intended for a large profile model. I made a fitting that goes across the engine mounting bolts opposite the engine, with 2 tubes facing fore and aft. I plumb the tank vents to them and cap one for flight. To fuel, I remove the cap then replace it for flight. The open line goes to the inboard foreward corner of the tank. I suppose you could run that line to muffler pressure, but it is not necessary. The pictured tank is from a NoblARF.
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Post by jim on Aug 2, 2004 12:18:51 GMT -7
I recomend, as you have expected that I would , that you try uniflowing one of your tanks and see what you think. Jim
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Post by tperry2054 on Aug 2, 2004 17:48:52 GMT -7
I know I'm probably missing somthing here, but what keep the fuel from coming out when flying inverted?
Tom
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Post by Garf on Aug 2, 2004 19:36:39 GMT -7
The tank is only part of the system. The small fitting shown in the second pic is installed just behind the prop and both vents are plumbed to it with fuel line. One is capped for flight. Here are a couple of pics of installed vents.
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