I keep coming back to this design for that and other reasons.
  Also because it can be retrofitted to Tracy's gear box.
  The stiffness  of the silicone blocks can be almost anything.

  Not because it is my design :)

  Paul Lamar

  Paul, I am willing to do some of the leg work getting these parts made if
  you like. Industrial metal supply is a few blocks from where I live, they
  can cut most of it. Plenty of other cutting options nearby as well.


  And to get a prototype made, I can weld it up too. Have an 84 syncrowave
  waiting for a job.

  Ed Carver

  Great Ed go for it. I think there are some laser cutters in your
  neighborhood.
  I am in the boonies when it comes to industrial stuff. Are you up
  to speed on Rhino or Solid Works? Most laser cutters guys can take Solid
  Works
  files. I can send Rhino files that will load into Solid Works.
  Mazdatrix sells suitable ring gears. Does Industrial metal supply sell
  4130
  sheet?
  Use a .090" for the flex plate. A bit over kill IMHO but fine for
  a test prototype. I'll test it on the RV4 after I get a few hours
  on it.

  You might want to make a prototype with cheap sheet steel to be certain
  everything fits on a counter weight.

  Get all that want them to send a deposit. Let me know what you
  need and I will send a check or cash your choice.

  Paul Lamar


  No rhino yet. I have Industrial metal working on a quote for the raw
stock
  .090 4130. They do water jet and will take one of your rhino files maybe.
 I
  will be down there tomorrow to purchase the 1 inch tube for my engine
  mount.

  Ed Carver

  OK Ed. Let us know what they are charging for 1 inch .049 4130 so we can
  compare
  prices.

  Check with IM and see if they can accept IGES or stp files.

  I can send them to you and you can give them a DVD or thumb drive.

  Paul Lamar



 They will take stp or iges.

  .090 4130 3'x12'=$525 I figured it is a little more than needed to make
20
 parts.
  They did not stock .050 4130 one inch tube, so I priced what they did
 have;
 .065 x 30 feet=$130

 They do water jet and laser cutting. Contact Terry Hill:
 thill@imsmetals.comHe apparently is the programmer for the lasers.

 I will, as usual, price this stuff elseware, IMS has usually been less
 costly compared to other local vendors. They do discount for larger
orders,
 and business accounts. Which does'nt include me.

 If the .050 tube is more than sufficient, I will us it for sure.

 Ed Carver

 I would go easy on the quantify of material bought  until we test this
 thing.

 Try .049" perhaps somebody is not reading the list properly.
 Yes the .065" is over kill for the motor mounts  and too heavy.
 I have to leave in a couple of days for a week in Reno so I will
 not get the dwgs done until I get back.

 AC Spruce is not bad on cost.

 Paul Lamar

I need to make a trip to ac spruce to get epoxy, etc. I'll pick up a 12x24
piece of 90 thou plate, it's about $30. I can make a prototype out of cheap
stuff from ims.

Ed Carver

Great Ed.

The splined plate is made from  part 675 in this dwg I think but I could be
wrong.
You might want to get one and find out. I'll see if I can get one when I
come back from Reno if you can wait. I think Tracy adds a short cylinder to
act as a pilot in the eshaft.  I know it is not a stock manual transmission
clutch spline. The 2.85:1 planetary gear set is part number 582 and the sun
gear is 612. Ring gear is 592.


Paul Lamar

--
I think we ought to make a concerted effort to build more or less duplicates
of the Mistral psru with a few improvements---including cheaper! Any machine
shops out there up to it?
Marc Wiese

They use custom gears so that adds a lot of money.
Ford parts are mass produced in the millions.
IMHO a constant speed prop is not worth the weight and expense for most two place
exp airplanes. Especially a high power to weight ratio rotary.
Just set the pitch for cruise and let the take off be what it
is.

Paul Lamar