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 I respectfully disagree. One of the biggest troubles for some systems, like a 20B
RV-10 will be the lack of a CS prop. That is saying that a fixed pitch won't work at all
but carrying enough pitch for cruse/top speed will lengthen takeoff distance by a
significant amount.
Bill Jepson

Not if you start with a p-port 3 rotor. How many RV10 out there have 375 HP?

Paul Lamar


The Vari-prop weighs 36 lbs (complete installation), has it's own hydraulic system, can
be purchased with almost whatever diameter and blade config you can think of. Cost is
the only issue, as they start @ $7k. The proprietor tells me he is doing brisk business
with the military, for the UAV market. Seems like a reliable and effective solution to
the non CS PSRU dilemma. It is the route I'm going to take.

http://www.variprop.com/products.html

C. Smith


Looks like they have a severe name conflict copyright issue  with the sail boat version.
We need some larger pictures to figure out if this is going to work for us.

Here is some stuff I saw at Aero in Friedrichshafen in April 2009.
http://www.alisport.com/eu/eng/eliche.htm

---------------------------------------------

Since we have a bolt on flange anyway this adapter will convert to a constant
speed hydraulic prop. First three attachments 3D's. All you need is longer 1/4 inch screws. I would however recommend a prop weight of less than 30 pounds. Preferably with carbon fiber blades.

Paul Lamar