The MA Scimitar and Mejzlik 18-8's both turned within 100 rpm of eachother on my BGX-1, and flew about the same (or so it seemed) I tried a Zinger, just to see what would happen, and it turned about 200 rpm faster but the planes performance suffered badly. It definitely did not pull as hard.

Same goes for my RCS180. . the Zinger 18-8 spins a tad faster than my Scimitar, but the plane definitely performs better with the Scimitar.



As for the test mentioned. .I find it REALLY hard to believe you'll see 1000 rpm drop by changing the pitch by 2" between a 22-8 and 22-10. IN a recent series of posts (da is here) http://www.rcuniverse.com/showthread...7&pagenumber=2 the person with the engine lists 7100 with a Mejzlik 22-10 and over 6700 with other props tested on the standard DA muffler (after getting the muffler to replace the one he had).

It's not me posting these numbers, but several people on different occasions. all you have to do is research it a bit. given that DA itself claims rpm figures in this range, and it is backed up by independent users with barely broken in engines, I'd say that a consistent and repeatable set of power numbers has been etablished for the DA50.

Call it 7100+ with a Mejzlik 22-10. . and in the 6700+ range with a Menz 22-10. That's whats being reported, and unless you want to call everyone who is sending in numbers a liar (which is what is being hinted at here), then I guess maybe they are telling the truth and we now have a broad-based spectrum of users agreeing on what the DA will turn with these props..