Subject: New PSRU design.
From: Rotary Engine
Date: 11/3/2009, 9:50 PM
To: AAA Put this in the To box



There is a limited market for cut down motor plates with no motor mounts. My
guess you will find less than five people willing to spend $250 to take out
2 or 3 pounds out of a flying example.

We need things with a higher priority than water pumps. The 2nd gen and 3rd
gen engines will become more scarce as times goes on and the RX8 pump is
fine as is. Also there is a light weight low cost aluminum cartridge already
available for the 2nd gen and 3rd gen pumps.

Now 15 pounds out of the gear box with a $1000 dollar saving is another
matter :)

Paul Lamar


Did you have Something specfic
In mind or were you just tossing out an ideal.

Clifton

I new light weight gear box design that takes the best features of the 30
pound Ross and improves upon them. It also takes advantage of the recent
drop in NC milling cost to lower the price and the weight. I am shopping for
a supplier of some of the harder to make parts as we speak. It will bolt to
Jeff's motor plate.  Tracy's box is about 40 pounds.

Paul Lamar
--
How about a version with a hollow shaft oil fed constant speed unit? That
would sell. Marc Wiese

That would be something I would not be interesting in getting into right now
due to the
weight of the CS props. One has to choose the largest market possible when
one gambles
on a new product. If this one is successful in the market place well then
maybe a CS
version.
--
Paul Lamar


Paul,
Have you seen the Aerocomposites cs units? http://www.aerocomposites.com/ or
the MT, or Hoffman, for weight.....all are composite blade, oil fed constant
speed units. Lighter weights. I've heard good reports from aerobatic (and
seaplane) pilots running some of them, esp the aerocomposite ones.
Marc Wiese

MT and Hoffman have electric versions as well.

Paul Lamar


Paul, others.

I have heard good things about Aero Composites but they are unwilling to
make a electric version.
This begs the question.   Are electric C/S props  adequate for non
acrobatic flying?  If so it seems a shame to add the weight and
complexity of a belt driven prop governor, plus the hassles of the
hollow prop, shaft seals and  hoses etc.


Doug in  Japan.

Mark Steitle runs one so lets ask him. Mark how well does it work?

Paul Lamar
-- 
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