Well said ,Bob....and thanks for the input. It's no secret that only the special
racing props are rated for....and are safe for the higher rpms of the pylon
engines. I'm not a competition pylon racer. I do have club racing pylon racers
with "sport" 40's, .45's, and .47 engines. They turn in the 16-17K range, not
anywhere near the rpm of the racing engines.
bob27s
The MA 9x6 was the standard prop for years in NEPRO Q-500 racing (K&B .40 engines).
Don't the K&B's run up in the 18-20K range ? It seems obvious that if that prop
was selected for spec racing in AMA, that it is a safe prop.
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Let's look at this "load" by our friend DHG, shall we ?
Aerodynamically, they're fine. In fact, I chose a Master Airscrew for a
cut-down bench prop because the airfoil and blade area at the hub looked better
than any of my wood or APC props for what I wanted it for, namely moving air
to cool the crankcase.
A cut-down bench prop ? What manufacturer recommends cutting down props ?
Answer none. They do not recommend "shaving, cutting down, or modifying
their props, anyone who ever read the prop instructions knows that.
You might want to "look again" at the APC prop. Does it not have extreme pitch
from the hub, out to about 2/3 the distance of the blade. Would it not "move air
to cool the crankcase."
But if I had known then what I know now about the length and composition
of the fibers in the material, and the way glass-filled nylon will instantly fail when it
reaches that magic combination of load, flex, and vibration, I would've thrown that
thing as far away as I could.
What kind of a load of bull is this ?....
"....glass-filled nylon will instantly fail when it reaches that magic combination."
Oh really ? What is the dreaded "magic combination"?
Should we all fear then, that maybe our Master Airscrew propellers will fail ?
You gotta love this "Domesday Report....
You can happily run Master Airscrews for combat, or aerobatics, or as
a replacement for the little cooling fan that came with your beach hat and water
bottle for all I care. But you should NEVER, EVER use one for bench break-in or
any other high-rpm/high-power application.
Oh, please....gimme a break.
If you do, you are looking at a bomb waiting to go off in your face. They
can sue me for saying it, but truth is a defense. I have photos and witness
statements to back me up.
Well, we certainly wouldn't have any "bombs" going off in our faces, now would
we ? I like the bit about the "witness statements" too....funny stuff.
Look Fellas....here's the bottom line. I'm a Moderator in this Forum, along with the
others. The trust of RCU has been placed upon me to insure that the messages
and statements posted on these boards is indeed factual and forthcoming.
You can quote me on this....I will not stand for kind of bull on my watch. These
kinds of lies and scare tactics about a perfectly good product will not fly around
here. Unless otherwise directed....I WILL take issue with anyone posting this kind
of bologna on the boards of RC Universe....
....I can promise you that.
Flyboy Dave.