Paul

 For your files.  A prop extension.  The inner boss doesn't look
 like it extends one inch upwards though.   Source is AirCraft Spruce catalog.
 Say recently  Google has linked images to a website.  Much faster
 to located a known technology.

 Check out this companies compact SR  water cooled alternator/ and
 starter motor.  Nice and compact.   SR is is a very efficient way
 to use the electric fields.   It is not easy to do though.
 Good-bye starter ring and starter?

 http://www.cpowert.com/products/speedstart.htm

 Doug in Japan

 What does that sucker weigh ? :)

 Paul Lamar

 --


 Paul

 C power  didn't develop the technology.  They are a customer.   The company
 that developed it was SR Drives in England which is
 wholly owned by Emerson of St. Louis. USA.

 I have yet to find out the weight but because the rotor has no
 windings and these puppies are super efficient my guess is about 17 lbs.

 Here is Emerson's site.    I am now involved in designing a small
 hydro electric generator of 1 to 3 kW range and water cooled SW is perfect.

 Mistral asked me about this years ago.  Say what is happening
 with Mistral anyway?


 http://www.srdrives.com/starter-generator.shtml

 Cheers

 Doug in Japan

 Mistral ran out of money.
 They made the following errors:

 1. EFI. Should have put an A/C carb and mags on it.
        Lycoming is now in the same position. At least
        they are exploiting the experimental market.
        The FAA don't do EFI.

 2. Refused to sell parts to the experimental aviation market.
   Priceless free R&D.

 3. Wasted time and money trying to get it to run on Jet A.

 Paul Lamar

Paul,

Agreed.  I would add one more.  Failure to explore the merits of
the P-ported engine.

Does that mean their company is gone?  What about that lovely PSRU?
I would love to produce something like that. Perhaps design it so a
higher gear ratio could also be used and use a different resonant damper.

Doug in Japan


Its gone. I don't know yet who bought the assets if any.
They had a 3 rotor powered Maule in Florida.

Paul Lamar