Is there any reason why the particular gear ratio between the rotor and
   the
   output shaft (not sure if this is the proper term) was chosen?  Would
   there
   be a way to modify this so that the PSRU was essentially integrated into
   the
   motor?  So, for example, so that 4 turns of the rotor were necessary for
   one
   turn of the shaft instead of 2?

   Just a thought, but might save alot of weight and one of the major risk
   factors of auto conversions.

   Thanks,
   Brannon

   I am not sure what you mean by "integrated".
   Can you come up with a sketch?

   Paul Lamar

  I think he is suggesting that instead of having the rotors turn once for
  three eccentric shaft revolutions you re gear the ratio to reduce the e
  shaft speed so that you no longer need a prsu. Pretty sure the answer is
 no
  but I wouldn't be able to come up with the why not (will seem obvious
 when
  you tell us). Would be a big job anyway, just dealing with the loads on
 the
  shaft would be challenging.

  John

  We had guy on here for years and he came come up with this.

  Paul Lamar



  I don't see how "Vances Folly" would work.  The stationary gear and main
 bearing are on the outboard ends of the engine.  Also, that would put all
 the torque on the rear sun gear.  So, I doubt it would last very long.
 And
 then there is the balance issue.  Have I missed anything?

 Mark S.

 Your not alone :)


 Paul Lamar


Not a hope in hell of changing the ratio of the planetary gear inside the
rotor.
That would make the gear much larger than the rotors actual dimension.
Increase the rotor dimensions, you'll have to build an entirely new motor,
then those larger rotors will have to
spin on a std size e/shaft to keep the stationarity gears std sized. Not a good
idea when the std shaft suffers from flexing at higher rpm with the rotors
it already carries. The 12a has less flex, the rotors aren't much lighter
than 13b,
but the main bearings are 20mm closer together.
Increase the E/shaft O.D. and the stationary gear ratio increases so your
back to the same ratio's as per standard.
Its a credit to the inventiveness of Felix that he found this concept.
Wankels system can only work with the 3 sided rotor in, that sized and
shaped trociod housing, with the planetary/side gear ratios provided. Change
any of these factors and you get a lump of scrap metal.
Sam Watson