Steve,
        Got any pics of the evap cores installed?  Thanks

Joe Berki
Limo EZ
Mounting evap cores
At 07:59 AM 8/18/2004 -0400, you (Steve Brooks) wrote:

Rusty,

Sorry to hear that rev 3 is having problems.  I can relate to the high temp issues though.  I ve done away with my large radiator in exchange for 2 evaporator cores.  These are (will) be mounted more in line with the incoming air flow. 

 

I m curious about how the temperatures you are seeing now compare to when you had the turbo.  You should have been making similar horsepower then as well.  Were your temperatures with the turbo also high ? 

 

Steve Brooks (working on rev 2)

 

 

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Russell Duffy
Sent: Tuesday, August 17, 2004 10:57 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Rev 3 flight report

 

Greetings,

 

I flew the rev-3 mod today for the first time, and there were no fatalities.  Unfortunately, that's about the end of the good news.  I need to spend some time thinking about this, because it just doesn't make complete sense to me.  Comments will be appreciated.

 

Cheers,

Rusty (tired, depressed, confused)

 

 

 

8-17-04  .5 hours

 

Flew the rev-3 setup for the first time, and it s clear this mod isn t over. 

 

First, the plane pulls HARD left on takeoff.  Tracy probably saved me from wrecking the plane with his advice to keep the tailwheel on the ground initially to use it for extra steering.  I m already planning to shim the mount to get the left thrust out. 

 

During climb, I needed even more right rudder.  If you let off the pedal, it pegs the ball on the right of the inclinometer.  In cruise, the ball is off to the right about as much as it was off to the left before. 

 

Climb rpm was only 5650 at 120 mph.  This was just short of 2000 fpm climb, but can t really be trusted since I had a ceiling of only 1400 ft to work with.  I really didn t get established in climb long enough to tell what it was really doing.  Temps go up fast now, but again, I wasn t able to climb long enough to find out just how bad it is. 

 

I spend some time orbiting the airport at 1400 ft, and about 5000 rpm.  The temps stabilized at 192 for oil, and 158 for water.  I went to full throttle for about 15 seconds, and saw a max of about 28 inches MAP at about 170 mph TAS.  Forgot to note the rpm, but I didn t let it build up anyway.  Temps go up fast. 

 

After the flight, I did some full throttle runs on the ground to look at the MAP.  With my current setup using the small plenum I made, I got 5500 rpm (down from yesterday for some reason), at 27.0 MAP.  Removing the inlet tubes from the throttle body gave me 5750 rpm, at 27.3 MAP.

 

I didn t think to check the accuracy of the EM-2 MAP display.  That struck me as odd that it would be exactly 30, then I realized that it gets it s MAP from the EC-2, which was not on.  I ve still got to verify this is correct, but bet that it is.

 

So, what does this leave me with.  First, I m not getting the 6200 static rpm that I think Tracy reported with his (still unverified) 13B setup.Tracy s, though that s a long shot. 

 

If the MAP readings are correct on the EM-2, I m losing about 3 inches of MAP in the throttle body alone.  My ports are on the engine side of the throttle body, which is only about 4 inches long.  The throttle body is the same ID as the intake runners, so am I losing 3 inches of MAP every 4 inches of intake runner.  This is depressing, though as always, there's significant room for improvement.