> Paul,
>
> I recently viewed Mistral's website and learned that they are
> offering two-
> 3 rotor engines. One is a 300 hp, 3 rotor engine, and the other
> is a 360 hp,
> turbocharged, 3 rotor engine.
>
> My question:
>
> Are they using the 20B? Will this lead to scarcity of the 20B
> engines? One
> caveat. I AM A ROTARY NEWBIE. Therefore; is a 3 rotor simply
> "more" of a 2
> rotor? I realize the bolts and eccentric shaft are unique. I am
> asking, as
> to the urgency of securing a 3 rotor engine for myself. Will the
> source for
> 20B's dry up anytime soon? Or, with all the 2 rotors out there,
> can I build
> a 3 rotor from 2 rotor parts, and with parts from a "trick" shop?
>
> Thank you,
>
> Perry- IL.
> N801YZ
>
> Basically yes a three rotor is one more 13B rotor however
> there are some unique parts.
>
> Mistral are building their own engines and parts loosely based
> on the
> Mazda. You need to contact them for details.
>
> The source of three rotor parts from Mazda could dry up any day.
> There are other sources for 3 rotor shafts and perhaps Mistral
> is the only alternate source for the special three rotor intermediate
> end housings right at the moment.
>
> Rumor has it Mazda is about to announce a larger two rotor
> 16B any day. Mazda needs a higher torque rotary for the RX8.
> The 3 rotor is deemed too expensive to make by Mazda.
>
> Paul Lamar ...No rotor no motor.

Hi Paul

Would a greater torque engine be preferred over the renesis in a
aircraft conversion.

Marc Montreal Canada

No! Only if the greater torque engine also had more HP.

Geared aircraft engines only care about HP. The simple fact of
the matter is drag times speed IS HP! One HP IS ten pounds of drag
moving at 55 feet per second or 550 pound feet per second.

An aircraft powered by a 200 HP engine (net out of the prop) going
200 MPH or 293 feet per second has 200HP X 550 / 293FPS or 375
pounds of drag.

At 7500 RPM the 16B (assuming the same volumetric efficiency I.E.
"porting".) will generate 16/13 more HP at 7500 RPM. Lets say your
13B P-port engine is now making 250 HP at 7500 RPM. A 16B P-port
will make 307 HP at the same 7500 RPM.

What counts in cars (given the same set of gears) is torque at
1000 to 3000 RPM. In theory if you lower the gears with a given HP
you get more acceleration. This gives diminishing returns due to
the rotating inertia of the engine itself. When you slam open
the throttle on an engine not connected to anything it takes
time for it to reach red line RPM. This is the problem with
the small displacement rotary in cars. People don't like to shift
a lot of gears. They like to drive around in high gear at 2000 RPM
(good MPG) and slam open the throttle and expect instantaneous
high acceleration. In this case there is no replacement for
displacement (torque). That is why 500 cubic inch V8's are so
popular.

Paul Lamar ...No rotor no motor.

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