FHHuber
In your above statement you said "If you are well above sea level then you will tend to need more runway for takeoff and landing. or some way to get more thrust, or you have to lose some weight. usually just shifting to a longer lower pitch prop helps a lot" My problem is with shifting to a longer lower pitch prop. At 8000' above sea level a internal combustion engine loses 30% + of it's power, so you need to prop it for a engine 30% smaller to get the same performance as at sea level. I would say less pitch and maybe a shorter prop to maintain engine performance. I run a Zenoah G62 with a 20X8 and get max. about 7400 RPM at 7500 feet above sea level, the engine is in great shape. Just wanted to add my 2 cents.


Thane