I have a lycoming, but I would prefer to build a rotary firewall forward
system. I think I can work the engine specific items, but in
  looking for a psru... HELP. Most of the sites I have come across are
  dead. Does anyone build a reliable PSRU?

RODNEY BINGHAM



If we can get 5 orders we will build a batch of the Ross copies. No
surprises. 100's have been sold. 10 pounds lighter than Tracy's. I'll
test fly it it on my RV4. Silicon rubber coupling. $3000 each. Billet
housing. Fit Jeff's adapter plate. Same bolt pattern as Tracy used.

Paul Lamar


I'd be interested in that. Probably next year before I can order though.

Chad Peterson.


Once we have five commitments it will take a while to complete the order.

Paul Lamar


I'll be needing one in 12 - 16 months, Have purchased my kit plane, it
is about to be shipped from US to Aus..

Regards Keith Bennett

Contact Neal he might as well be making more than one. Neil Unger
<neil.unger@bigpond.com



Paul Lamar


I would be interested.  Could I get a look at the general construction
of it?
Diagram? Pics?  Good for 300 hp?

Rod Bingham

Are you in Oz Rod? If so Neal, got any 3D's yet?

Here are a bunch pictures of Tracy's stuff.

It depends on how you get the 300 HP and the RPM you get it at.
If turbo that implies more torque than a normally aspirated P-port
rotary putting out 300 HP at 9500 RPM.

It has been used on a 3 rotor turbo that puts out more torque than one
can get with a 2 rotor engine.

Paul Lamar


Paul,
          Today I had the drawings done for the "flex coupling" so
once that is finalised the initial prototype can be made for testing.  I
am calling it an improved RWS  PSRU as it will fit exactly where Tracy's
PSRU exists.  Now attempting to ascertain the weight to compare. Will
definitely be lighter but how much will be the surprise.  Once the
prototype has lasted the 50 hours I will aim to produce them in batches
of 5 for sale. Now to build an engine mount ready for the test bed based
on an RV9.

Neil.

The 3D drawing program will tell you the weight of the parts.
If it is solid works you can export an IGES file and I can load that
into Rhino and determine the weight of the part.

Paul Lamar


Try this one. It gets my present vote. Too bad it's not a planetary.
They will be at Oshkosh, I think Stuart Davis is giving a forum on the
unit. Larry Pearlman bought the business from Bud. Neat constant speed
product. Believe they have plans for one for a rotary as well with 0 offset.
Auto PSRU's
(936) 827-5126
geareddrives@yahoogroups.com is the group set up for it.

Marc.

Bud and his daughter died  in a Chev V8 powered exp crash.

It is another 100 pound V8 box with a centrifugal clutch that weighs 20
or 40 pounds
all by it self.


Furthermore the ratios are less than 2:1 so far. We need about 3:1

Paul Lamar



Paul,
       Still finalising thrust bearings and flex drive.  Bearing companies
will not forward details once they get a whiff of "aerospace" application.
They seem to think I am off to the moon with this thing.  So to save all
arguments, I have to get details for a boat prop.  Then comes the problem of
explaining how a boat prop is turning at 2700 RPM. Oh the joys, but getting
there. Now have head full of setting up the test bed for an RV9 pattern.
Have to travel a hundred miles to get the bolt pattern off an RV under
construction.

Neil.


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