|
Excellent Dennis!! Great workmanship!!
Joe Berki
Limo EZ
----- Original Message -----
Sent: Monday, January 07, 2008 6:33
PM
Subject: [FlyRotary] 60 Hour
Inspecton
60 Hour Inspection : RV-7A, RX-8 Renesis engine, James
Rotary Cowl, Radiators under engine
As of January 08 I've flown my
Renesis powered RV-7A about 60 hours. At the 60 hour mark I did a
detailed inspection of the intake and exhaust systems as well as everything
else under the cowl.
I found no cracks or other problems with the exhaust
system!! The heat shield between the muffler and the left cowl had lost
one attachment screw- no big deal. Attached are pictures of the
exhaust. I use a stock RX-8 exhaust manifold - a 4 in dia. X approx. 6
inch long swirl pipe(see third picture) to redirect the exhaust from the front
to the rear of the plane and a Flowmaster Hushpower Resonator (PN -
12512400) as the exhaust muffler. Everyone who hears the airplane fly
comments on how quiet the engine is - neighbors call it the Stealth Rotary
RV! It is super quiet compared to my neighbors 180 Lycom.
RV-7A. I don't know if the Flowmaster muffler will withstand the
exhaust pulses from the RX-7 engine rotors but I feel confident the muffler
will work with the Renesis. Mark Steitle with his 20 B engine and
Flowmaster resonator will have first hand knowledge soon!
I had
previously found that one EGT probe extension wire melted - it was about 8
inches from the exhaust system. The probe wires leads were not
damaged but the extension thermocouple wire from A/S had insulation
that melted from the exhaust heat. I have rerouted the extension wire to
keep it away from the exhaust.
There were no problems with the intake
system. It is fabricated using part of the RX-8 manifold and a
home-made intake plenum. I used the stock injectors, fuel rails and
injector locations. The fuel pulse damper was removed! (Pictures in next
E-Mail)
I did find several very small oil leaks in the casting of the
PSRU. I'll confer with Tracy as to how to address these.
I used
the James Rotary Cowl - same one as the Power Sport rotary used - mounted my
oil and water radiators underneath the engine, bought an engine from a
wrecked RX-8 with less than 10,000 miles on it. The engine was not
disassembled. I also used (with some modifications) the exhaust,
intake, fuel injection parts, spark plugs, plug wires, coils, 100 amp
alternator, oil injecton with Richards adaptor, water pump and water
outlet system with the thermostat removed. (See attached pictures)
I
will be adding a cowl flap to keep the oil and water temps. cooler in the
hottest summer and warmer in the coldest winter temperatures.
My prop
is a Catto 76 in. dia X 88 in. pitch and my max. cruise rpm is only
6200. I am over- propped for the HP currently being produced. This
does allow me to cruise at rpms around 5400 when I want to go fairly fast and
keep fuel flow down.
My intake and muffler systems could be
improved to raise HP. I've been flying side-by-side with my neighbors
RV-7A with a Lyco. 180 HP engine and a metal fixed pitch prop. At the
same take-off weight we climb about the same rate and in cruise we are about
the same speed. I believe I will be slightly faster above 8000 feet alt.
in cruise.
My success so far is in large part due to the
contributions others have made to my project by posting - their successes and
failures, thoughts, knowledge, suggestions and references to other
sources - to this list!!!
A Special "Thank You" to Ed Anderson, Lynn
Hanover, Al Gietzen and all the other contributors for all the great
knowledge they bring to the rotary group!
Dennis Haverlah
 (2).JPG)
.JPG)
.JPG)
--
Homepage: http://www.flyrotary.com/
Archive and
UnSub:
http://mail.lancaironline.net:81/lists/flyrotary/List.html
No virus found in this incoming message.
Checked by AVG Free
Edition.
Version: 7.5.516 / Virus Database: 269.17.13/1213 - Release Date:
1/7/2008 9:14 AM
|