by Tom Corell » Sat Sep 24, 2016 7:32 pm
Tim
Thanks for the reply, I flew my airplane the other day at 6500 da 24in 2440 rpm(sweet spot valve timing) two people 50 gal fuel & trued out 176 knots @17 .5 gph, at 9.5 to 10.5 isa grossed out I get 170 kts 14 gph with couple kt increase with burn off.it looks like I get the extra 3 kts on a already fast pa30c I will try a drift down from alt when conditions permit and compare the info with my pa30c drift down tables which are based on GROUND SPEED Keep in mind the MTs are not like other 3 bladed props that lose their perfomance to various degrees.The props & eng have a completely different sound than before that's really neat These props bring this airplane up to the 21st century Thanks again for your comment Tim.
Tommyc.
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