Your article is loads better than the current one on prop effective pitch.
Vance

I just read that Effective Pitch article in EAA Sport Av and it is not
all that bad of an idea. Course it is a bit redundant with just specifying
the top speed achieved with a given prop.

It would be better if the prop building guys used a cord pitch instead
of the bottom of the blade. Also a speed specification for optimum twist.

If that seems impractical then specify the angle of the blade every
0.1 blade radii. Too many props out there with the wrong twist, improperly
twisted or no twist at all.

Perhaps the EAA could apply some pressure for standardization.

Why don't you write an article on props Vance? Send it to me first and
I will critique it :-)

Paul Lamar

Paul/Vance,
It looks like your the expert on props Vance.
I've been doing some research and I just can't seem to get anywhere
too much maths and not enough info - for me.
It would also seem Paul is correct with his statement about the Props out
there.
There seems to be a lot of guessing on the part of the prop makers and much
of it is incorrect.
I for one would like it if you did an article on Props Vance.
I know it is and can be a complex issue. I initially sought simple
solutions,
I believe many Prop makers use these, however the more you read the more
you wonder if anyone could ever get it right.
Perhaps there is a good book - perhaps a computer program ???
So Vance if your up on it - please, help!!
George (down under)

 
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