Sounds like the NIH (not invented here) factor  to
me.   I'm betting (with money) they are wrong about
the Renesis.  I have one on the way scheduled for
delivery next month.  With any luck it will be
installed on the nose of my RV-4 before the next Sun
100 race at Sun 'n Fun.    The question I have for Powersport is:  Why did they
stiff their customers who paid 100% for their FWF
engine packages and did not get their engine
controllers or exhaust systems.  I personally talked
to 3 of them who had this happen and they said there
were others who had the same experience.    Did they
make delivery or not?  If not, I consider them out
of business despite their claims to the contrary.

Tracy Crook,  (and you can quote me on this)

----- Original Message -----
From: Greg Fuess
Sent: Tuesday, February 03, 2004 6:32 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Renesis Engine For Aircraft

All, Some food for thought.  Powersport has started
replying to e-mail on another list, and was asked
about the Renesis engine.  This is what Tim had to
say.  I had thought that the Renesis would have been
a great aircraft engine, but would have to lean
towards more educated opinion.  The questions to
powersport and their replies are copied in full
below.
  
I would appreciate any feedback on what is said.
  
Thanks,  Greg Fuess
  
Thanks for the info. Some questions for you:

1. What is the status of Powersport? Is it currently
shipping FWF
packages for RVs? Which model RVs?

Currently we have completely developed FWF packages
for RV 6-7-8-9 (9 at your own  "not recommended by Vans" discretion.)

2. Is the Renesis engine interchangeable with the
old 13B? Obviously
different exhaust, but are the engine mounts, etc.
the same?

Simply put, the Renesis is not suited for
installation in aircraft. There are many  reasons for this.

3. Is the Renesis engine better than the old 13B for
aviation use? I
understand it has better economy and sealing due to
the new port
arrangement. Is there anything else we should
consider?

No, the Renesis is far worse for aviation use. It
does not have better economy,  especially at the RPM range used in an aircraft. It
is lower HP! It still needs a suitable  aircraft ECU added. It develops its HP at a higher
RPM with will reduce its life cycle.  The changes made were for emissions and low end
torque, which are not important  factors in aircraft. Mazda still uses P-Port system
for their top racing application.

4. Is Powersport planning on switching to a
Renesis-based FWF?

No, see above.

I am not saying the Renesis is not a good engine, it
is a great engine... for a car.
The HP ratings are way overstated. Those who have
run them on dynos have reported  outputs around 180HP.

Thanks,
Tim