|
|
Rusty, hang in there fellow. I had to modify my oil cooling arrangement
FIVE times to get it right and you did it on your second try. I am on my 4th
intake manifold, etc. Based on my recent experience in reducing my raditor
inlet ducting by 30 % (from a total of 48 in^2 to 33in^2 and cooling was
still adequate, you might try minimizing your inlet are first. I can't tell
the size of it but it looks to be pretty large. Since you have coolant and
oil air flowing through the one duct my estimate is that it does not need to
total more than 72 in^2. If it is considerably more than that, it may be
excessive (depending on the airflow and outlet under the cowl).
Nope! Sorry no spare prop to lend Rusty.
While Tracy Crook and others have reported hitting a "wall" with the IVO
prop at around 175MPH that is still considerably higher than what Rusty is
apparently getting.
Drag goes up as the square of velocity (as best I recall), so a lot of drag
just might be a large part of the problem, but I agree with Rusty it would
seem that with the HP he is apparently generating he should be going faster
even with that BUC. I would think the high drag cowl would affect his top
end speed much more than his climb rate, but then finding out is what is all
about.
Stick with it Rusty
Ed Smfrtdpm
----- Original Message -----
From: "Rick Girard" <fly.ez@verizon.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Sunday, September 14, 2003 3:39 AM
Subject: [FlyRotary] Re: Good news, Bad news
Russell, Maybe someone on the COZY list has an SAE 2 prop they'd let you
test with (pusher CCW prop is a tractor CW prop and vice versa) Might
take the guess work out real quick. Tracy, Ed, you got a spare prop or
know someone who does?
Rick Girard
>> Homepage: http://www.flyrotary.com/
>> Archive: http://lancaironline.net/lists/flyrotary/List.html
|
|