Most of these airplanes have piston engines with 2 to 5 times the
 displacement of the Mazda 160 ci 13B Wankel yet Dave is competitive.

 With a p-port, more streamlined intake manifold, max 2 rotor turbo power
 will go up from about the current 250 HP to about 300 HP at the same
 45 inches of HG boost. Of course bost levels could go much higher
 as the Wankel block is very robust indeed.

 In car drag racing these turbo engine will develop well over 700 HP however
 that would take a change in gear ratio from the current 2.17:1 to
 more than 3:1 so the engine can rev to its 10,000 or 11,000 RPM red line
 without exceeding Mach 1 prop tip speed.

 I suspect many of these turbo piston engines racing at Reno are now using
 NOS so the sky is the limit there.

 Perhaps the next step is a cleaner airframe and a 3 or 4 rotor.

 The picture captions are largely self explanatory.
 The guy standing on the left in the fourth picture name is Red and
 he was Dr. Dave's teacher in anesthesiology as well as his pilot CFI
 instructor. He has a Phd in oceanography as well.

 As a result of the 229 MPH posted Dave has won the $1000 Everett
 Hatch memorial prise for exceeding 220 MPH using a Wankel rotary
 engine in an air race. A past winner was Tracy Crook at 210 MPH.

 That depletes the fund and raises the bar to 250 MPH assuming we get
 new donations. First we must beef up the RV tails to raise the VNE.

 Paul Lamar

Hi Paul,

 I thought the 2.17 gears were 4 gears not 6. Guess I am wrong on that, but
the parts diagrams show 4.
 Now to change the ratio to 3.17, the planet carrier has to become the drive
to the prop shaft and the ring gear must be held. Is this possible with Ford
parts?

Dale Davies

To reiterate the reduction ratio has nothing to do with the number of pinions.
With the front and back planetary alone you have four choices of reduction ratio. Early
C6 version had 3 gears as I recall. Ford was not the first to make six planet versions.
The hot rodders did it first.


Yes to get 3.17:1 you hold the back set ring gear and take the power out of the
planet carrier. Probably a good idea to machine the teeth off it.


Paul Lamar


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