Ian Bagshaw Posted May 12, 2018 Share Posted May 12, 2018 How do people set up their fuel tank and engine so you don't loose power in outside loops or whenever the plane is in a vertical dive? Currently my OS55 has a standard fuel setup with pressure from the exhaust with a one way valve, but when I'm at the bottom of the loop the engine is searching for fuel. Many thanks Ian Quote Link to comment Share on other sites More sharing options...
Jon H Posted May 12, 2018 Share Posted May 12, 2018 one way valve? whats that doing in there? Quote Link to comment Share on other sites More sharing options...
Former Member Posted May 12, 2018 Share Posted May 12, 2018 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted May 12, 2018 Share Posted May 12, 2018 Ian, a motor that is run in, with no extra valves, and good plumbing, decent glow plug, with normal clunk will bunt. So one or more requirements are adrift Quote Link to comment Share on other sites More sharing options...
Ian Bagshaw Posted May 12, 2018 Author Share Posted May 12, 2018 Many thanks I will do some checking the valve is to keep the system pressurised and stop unspent fuel coming out of the exhaust, works a treat. Quote Link to comment Share on other sites More sharing options...
stu knowles Posted May 12, 2018 Share Posted May 12, 2018 The one way valve is the only thing that you don't need. Better with a clip to apply after the flight to stop fuel running back into the exhaust during transport.(IMHO) Quote Link to comment Share on other sites More sharing options...
ASH. Posted May 12, 2018 Share Posted May 12, 2018 Ian, the way to prevent any fuel running back out through the pressure line is to loop the tubing up over the engine mount first then down to the exhaust. I always loop all three lines, it also prevents siphoning to an inverted mount. You will have to take the tank out and put in longer tubing, whilst there check free movement of the clunks and fit metal fuel clips at the outlets. No risk of slippage then. As said above.. no extra valves! ps it's good practise to drain tank of all fuel after flying session and burn off any left in carb line. Edited By ASH. on 12/05/2018 21:57:07 Quote Link to comment Share on other sites More sharing options...
Ian Bagshaw Posted May 12, 2018 Author Share Posted May 12, 2018 Thanks for all the advice I was just wondering if anybody had a different clunk setup, the valve system is just a one way valve & I have been using them for 35 years...works perfectly Ian Quote Link to comment Share on other sites More sharing options...
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