"The power produced by the Wankel sections installed in the MecanAir
 engine is optimized with turbo-supercharging. The turbocharger boosts
the manifold pressure already at sea level to increase the power, and
maintain the manifold pressure and power up to the critical altitude.

This feature allows variable compromises for ratings. Normal rating
 which was decided for the TIE-200-V1A engine is 200 HP @ 2000
propeller RPM. By increasing the RPM and adjusting the manifold
pressure, a take-off rating of 220 HP DIN @ 2200 RPM may be used.

Our rotary TIE-200-V1A model engine is turbo-super-charged, an
exhaust gas turbine driven compressor boosts manifold pressure up to
47" Hg."
*******************************************************************

47 inches of Hg is about 8.5 psi boost. So it looks like the stock
set up is good for 8.5 psi boost and about 220 HP.

And this sounds like Tracy's gear box.

*******************************************************************
"In the MecanAir engine, the "crankshaft" drives the sun gear through a
dampener. The bell gear is bolted to the case but is designed in such a
manner as to have some design elastic properties to equalize the forces
 between the planetary gears. The propeller shaft is driven by the
planetary gear "spider"."

Mechanical stress is evenly distributed between six (6) planetary gears.
 Propeller shaft is kept in line with the crankshaft.
Lower propeller speed produces less noise and increased cabin
 comfort.

Standard propellers may be used as the shaft rotates in the conventional
 direction."
**********************************************************************

     Paul,
      Have you heard what the actual ratio of the "MecanAir" redrive is? No
 mention of engine rpm so we can calculate it. The prop rpm would indicate
 something close to the C6/E40D based 2.85 such as the "Ross" (And hopefully
 a 2.85 from Tracy someday).

     Kelly Troyer

It is on the pdf data sheet you can download from their web site. 
2.95:1. Max RPM is 6500 with a prop RPM of 2200. Big or a very quiet prop!

Paul Lamar
 
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