In a message of 18 Dec 95  11:24:34, Roger Marshall wrote:
RM>  Hi, guys...
RM>  
RM>  -=> Quoting Ken Ellison to Mark Corona <=-
RM> 
RM>  KE> Why is that?  That is what everyone sells.  If you order from say
RM>  KE> Tower Hobbies, etc...  They all sell Master Airscrews.  Also I see a
RM>  KE> lot (about 90 percent) of the pilots at the airfield that use them.
    Now, here's a message that I never saw.
RM>  Just for whatever it's worth - I prefer wood props (Zinger mostly) and
RM>  I use them whenever I'm flying a bird that won't go over on its nose - 
RM>  I use APC otherwise - I have used Master Airscrew props for my large
RM>  4-cycles, largely because they're cheaper than the big APC or wood
RM>  props - they do OK but they do tend to flex under high RPM, making me
RM>  suspicious about their efficiency and safety.  TTYL - Roger
    Master airscrew don't seem to hold their pitch well.  I get a very marked 
increase in speed and thrust with APC.  I tend to be able to go up a full 
inch in pitch with no loss in RPM.
    If you look at the edge of a master airscrew while under power you will 
notice that the blades are not tracking in the same plane.  Don't look too 
close, you might get a face full of blade.  The inaccurate tracking shows 
that the blades are not producing the same thrust, or one blade is stiffer. 
          MC
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