Lots of good advice here but getting back to Echoindiajulliet's original query about weight and the C150 in particular (although before the PPRUNE pedants jump on me I guess this applies to any plane).
As long as you are within the weight and balance limits, it will fly just fine.
A while ago I took an 18 Stone friend up in C150 and a lot of people at the club expressed concern (he is a real fat biffer) but I calculated how much fuel I could take on and keep below Max take off weight. Several people checked my figures and we all came to within a few pounds/kilos of the same answer.
The take off run was a little longer than usual but that was the only difference. Obviously its winter and if your taking off from wet grass factor this into your abort point calculation.
PS At the risk of whipping the Pedants up into a frenzy, I actually find the C150 easier to land than the C172
Good luck with the test,
cpl4hire
Last edited by cpl4hire; 28th October 2008 at 12:29.