Gentlemen,
A relay from Thomas:
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Dear Barry,
for some unexplainable reason, I cannot post to the forum. Albeit I often would
like to share my experience.
Anyway, I am not sure whether I would subscribe still that converting from wider
blades to the tapered ones does help much in performance.
It is a complex co-play between OAT, Altitude, prop-angle and engine
performance.
I think I did change when I still had a ground-adjustable hub and then it helped
as the 912 is a quite weak engine when at high OAT and a heavy plane.
I am now flying non-tapered and illegally long (by Europa-standards) blades in
the search for hi-altitude performance. Since I added the airbox which is fed
by a NACA-Scoop with fresh and slightly pressurized air, my max indicated
altitude
flown in California was 18.200 feet. The RPM at take-off is however scaringly
low even with minimum prop-angle. Only during the second half of the roll
will I see more than 4.800 rpm !
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Barry
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Barry Tennant
D-EHBT
At EDLM - Germany
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=396037#396037
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