CASA used to issue P-charts for light GA aircraft which took into account many factors including, but not limited to, old aircraft and the abilities of an 'average' pilot.
Their factor was 15% over the POH figures although these days they don't make these charts anymore.
If 15% is good enough for CASA then I guess it's good enough for everyone else!
Last edited by ConfigFull; 27th September 2009 at 07:57.
Reason: silly spelling mistake...