>      > > > Hello every one You can try again and I hope with better

      > > > luck.Some hi tech glitch in cyber space...??
      > > > Let me know.please. Cheers John.
      >
      > John,
      >
      > I like the 3 piece housing very neat.
      >
      > Do you know what RPM the BMW coupling is rated for?
      >
      > Can you advise of the total all-up weight.
      >
      > In your original assessment did you find splash oiling insufficient?
      > Thanks
      > George

  Hello George!   According to BMW (9 to 10000rpm) although  I did not
 see the specs on it! The weight of the PSRU
 with the starter is 49 lbs.The flywheel with the coupling is 19 lbs.
 While I was running tests;in the first 45 hrs I
 just ran on slpash,and the temp.never went over 205 degrees! Then ,with
 a nice spinner on the prop the temp. went up to
 230 degrees. However with the prop pusher mode,the temp stayed at
 205-degrees. I used 20w50 oil! With the oil from the
 engine directly from the cooler temp. stays around 190 degrees!

19 pounds is WAY too much weight for a rotary engine flywheel John.

Paul Lamar

   I disagree, I had three torsional dampers brake on my Ross gearbox,
one that went through the prop and the prop drove a piece through the
wing so I installed a 18 lb flywheel and it eliminated the problem
and as a side effect there was a very noticeable gain in power as the
flywheel absorbs power pulses and gives that power back during the
lull so I think it is worth its extra weight.
   Atkins had the same problem and installed to a flywheel and
reported the same results.
  I also tried my cog belt without a a flywheel and didn't like the
vibrations at certain rpm's so I installed a 16 lb flywheel and again
there was a noticeable performance gain that was worth the extra
weight.
  I have also noticed this in the off road cars that I have been
around, a lot of people install light flywheels but you have a lot
more torque with a heavy flywheel.

   Ken

There is no doubt that a heavy flywheel smoothes out the torque pulses.
It is the bigger hammer approach. On the other hand many airplanes are
flying successfully with the 3 or 4 pound flex plate alone. Tracy
Crook's damper plate works much better than the old BMW clutch disk
used by Ross. In your case you have a 5 bladed Warp Drive prop that probably
has a lot more rotational inertia than the average bear.

BTW I love those pictures you sent Ken. You lucky dog.

Paul Lamar
 
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