I guess it is no secret that I am not a big fan of gas systems, its not that they dont work you understand, they do and David Merriman has proved that time and again. I have built them in the past with great success but the truth is I am just too tight to pay for the gas.
I make my own piston tanks with one at the front and one at the rear and having boyancy for and aft makes a large boat much better when on the surface. I was lucky anough to win an ADF in last years competition so I put it in my little Alpha to try it out but with a difference. I linked the rear vane servo to a set of mico swithches that cut out the tank that is either filling or emptying first so as I submerge or surface the tanks maintain level trim without any messing about with bits of lead. Now the great thing is that by using the manual overide I can adjust surface trim by simply moving the vanes up or down and this automatically adjusts the tanks, I can then put vanes back to neutral and as soon as I dive the tanks sort things out. My party piece is to put a 4 oz block of lead on the stern but the boat will still dive and surface perfectly. LOVE IT!
I make my own piston tanks with one at the front and one at the rear and having boyancy for and aft makes a large boat much better when on the surface. I was lucky anough to win an ADF in last years competition so I put it in my little Alpha to try it out but with a difference. I linked the rear vane servo to a set of mico swithches that cut out the tank that is either filling or emptying first so as I submerge or surface the tanks maintain level trim without any messing about with bits of lead. Now the great thing is that by using the manual overide I can adjust surface trim by simply moving the vanes up or down and this automatically adjusts the tanks, I can then put vanes back to neutral and as soon as I dive the tanks sort things out. My party piece is to put a 4 oz block of lead on the stern but the boat will still dive and surface perfectly. LOVE IT!
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