Dennis,
Could you please
describe the “hump” a little better? Are you talking about trying to
turn the air in the plenum? Pictures
perhaps?
Bill
B
From:
Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Dennis Havarlah
Sent: Sunday, October 31, 2010 10:30
PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: FW: [FlyRotary]
Ready to fly again
My Catto 76X88 prop for the
Renesis has a maximum cord of 6 ". If yours is wider I believe it is too
big for the engine. My static was 5730 rpm on a 90 deg
day.
When I first started flying the
rotary (three years ago) I had oil and water cooling problems - I used a
home made wind tunnel 2 inches wide inserted into the cowl and blew air into
it with a squirrel cage blower from a home A/C unit. I used a manometer
on the back side of the radiator to measure air pressure as the air came
through the radiator. I found I needed a good hump in the lower part of
the cowl inlet to deflect incoming air evenly through the oil and water
radiators. My radiators are
side-by-side.
You might use a GPS to compare
with the air speed gages to make sure they are in the ball
park.