Something my club pointed out when I flew my prankster for the first time yesterday (Actually, I flew it 9 times that day . . .), was how short a time the fuel tank seemed to last. So, this morning I decided to find out exactly how long.
Using an OSLA 40, A3 glowplug, Double yellow spot fuel at WOT, I managed to get about 9 mins of run-time (with the HS needle set just a little richer than the highest rpm). Is the acceptable? MY only reason for not putting a bigger tank in is that the plane struggles to take off anyway (uses almost the entire length of the patch). I may put a more powerful engine on, but that will require an even bigger tank (I was thinking a JEN .56). So, the questions are;

1) any idea what tank is in at the moment?

2) is this sort of run-time normal? Or should I be able to keep the engine at WOT for longer?

3) How much more fuel does a .56 engine use over a .40?

Many thanks,