RE: PUSHER engine - fuel flow problem w 2 tanks
Hi!
If you use a conventional R/C tank the clunk should be at the rear...but why use a clunk in the first place! It's not needed in a sport model.
All R/C models can be flown without a clunk in the tank...all you have to do is to bend the sucktion tubing down so that the engine gets fuel when the nose points upward. OK! You can't do any lenghty inverted flights but all other maneuvers will work just fine. If you have long fuel hose it's no problemn to fly inverted for, lets say 5-10 seconds.
Best solution obviously is to use the Tettra"Bubbleless" tank which has no clunk at all. Fuel and air are separated with silicon bladder inside the tank and fuel is pressed forward to the carb by the pressure developed by the silencer/pipe.
I have had a 6oz Tettra tank in my .40 size "Pushy Cat" pylonracer for years and it works very good.