"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."
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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.
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"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."
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And fuel consumption.
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"MecanAir electronic injection and ignition management system
controls fuel combustion very precisely. Actual test bench
mesurements show that the MecanAir TIE-200-V1A engine uses
slightly less fuel than a conventional air-cooled aircraft engine of the
same power."
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We are probably doing a lot of the cooling system developement for them not to
mention the real world in the air testing we are also doing.
Paul Lamar
The AirCraft Rotary Engine NewsLetter. Powered by Linux.
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