snip...

BTW Chuck Harbert should have been going 220 to 250 MPH with his turbo 3

rotor

in a standard size Velocity and not just 200 MPH.

Paul Lamar

    Seriously Paul, help us out here. I'm not into bad mouthing anyone's
product whatever it is, and there's an old cliché, "Speed costs, how fast do
you want to go."  -  It also applies to our airplanes.  For those who need
all the power they can get for take-offs, but would still like to go faster
than the fixed pitch power prop can go, what are the options.  A new MT,
Whirlwind, or any of many other good variable pitch props costs well over
the ten thousand dollar mark.  I keep hearing hangar talk about someone who
knew someone else who bought a used VP prop for four or five thousand
dollars and then had it re-worked to fit their plane, but I'm not running
across many of those deals myself.  What else is a person to do when the VP
props cost almost as much as their airplane kit did?  I can see why a lot of
people are willing to accept some sort of compromise on perfection, the
prices on those things are staggering.  -   What's the average guy supposed
to do?

Robin

Well you could adapt a $900 governor to a 20B with a cog belt drive and use a Hartzel 
or McCauly constant speed prop if you could figure out a way of getting
the oil pressure into the prop through the PSRU shaft. I have an 84 inch constant 
speed two blade McCauly in excellent condition for sale off my C82 that I have 
been offered only $1500 for. I am asking $2000. Its real heavy. Most of the weight 
is in the aluminum blades.  I just had to buy a rebuilt one for $3500. Long story. 
The FAA would not let me use my old good prop on my new engine.

Have you checked the ACRE NL web site for my design of an electric variable pitch prop?
Do you have any friends with a machine shop?. I tried to design it so it would
be as simple and cheap to make as possible. The housing is a simple weldment 
made from 4130 tubing.

Paul Lamar
 
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