Hi Guys,

I'm having a little trouble with my engine dying when doing outside loops. I enter the manoeuvre from the top at about 1/3rd throttle and the engine starts play up just before the bottom (about 4 o'clock) of the loop. The engine dies either at the bottom or just after the bottom when I'm starting to open the throttle right up to complete the loop.

The engine I'm using is an OS 1.60 FX with a Perry pump. The tank is a 16 Oz two line set-up with a standard clunk. The tank is mounted on the CG.

I suspect the fuel is dropping to the front of the tank leaving the clunk out of the fuel. On a full tank the engine appears to do outside loops fine. The engine seems to do all other manoeuvres fine although I haven't tried an outside loop from the bottom while inverted...

I'm considering trying a few things like a heavier clunk, more flexible clunk line or even a header tank.

What are people's thoughts and have others seen this problem?

Cheers
Jason.