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Old 12-08-2003 | 08:22 AM
  #16  
gus
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From: Toronto, ON, CANADA
Default RE: paper or plastic?

ORIGINAL: Mike in DC

When the airplane is in the air, I've never heard that there is a significant difference.

.....
Well, I have first hand observation of differences in props "in the air". When I was still flying my trainer, I had soloed fine, but did not yet have my "second" plane. I was trying to do inverted outside loops. Fly inverted straight-and-level... push forward on the stick, and go "up" and around the loop. My plane was a PT-40 with an OS 46LA.

Well, I had been trying, trying, and trying, but the plane just did not have the oomph to get around the loop. It would go up, to about 10degrees from vertical, and then "fall off" like in a hammerhead, but in the upright direction, so it was really just doing pointy waves in the air, instead of loops.

The flying instructor that took me through to my solo was at the field, he said "change that master airscrew for an APC", so next time at the field, I did.

I swapped out my 11x6 Master Airscrew for an 11x6 APC, and now the inverted loops are well within the capability of the plane. Not exactly round, but they are possible.

FWIW, I now fly 11x5 APC on that plane, and it is just fine with most simple aerobatics.

gus