Phil Flaugher wrote:

After years of excuses the airplane and the powerplant have been
selected;
Wittman Tailwind and Mazda rotary.

Every airplane and every powerplant seem to have unbelievable claims
for
speed and power. I hope you folks can help determine
honest expectations.

I'm wanting to achieve 200 mph cruise and 15,000 feet; best I can tell
the power requirements at 5,000 feet would be
approximately 170 HP with turbo to maintain speed at altitude.

Is anyone doing this now?

Everything is a supertight budget (isn't everyone's ?) so the
PSRU and intake manifold will have to be home fabbed but Tracy's
fuel and ignition controls are on Santa's list.

Can anyone tell me what a complete rotary installation, with and
 without turbo, with and without OEM muffler, with oil and
coolant, will weigh?

Be prepared for lots of info requests.......expect to buy engine
first of the year.

Thanks for leading the way.

Phil

I think that speed is easily doable. Try to find an 1989 or 1991 Turbo
II
Mazda RX7 motor. Without turbo you are looking at about 320 pounds
firewall forward. Take off for the muffler and add the turbo
roughly another 30 pounds.

Paul Lamar

Jerry Hey wrote:

Hi Phil,   a lot of work has already been done regarding on the rotary
powered TW.  Since the performance  you are looking for is well within
the ability of a 160 hp 0-320,  it will easily be achieved by a rotary
engine.   You will have great difficulty sticking a turbo inside the TW
cowl.  I don't think it is possible.  But will be glad to be proven
wrong.     A better and lighter configuration is with P Ports.   You
will easily achieve 200 plus h.p. and save weight as well.     Issue
#12 of the Tailwind Times covers the rotary installation is some
detail.   You can e-mail me privately for more info about that
publication.

I think the Tailwind and the Rotary engine will  prove to be a
wonderful combination.        Jerry

Jerry Hey <j-winddesigns@thegrid.net>

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