Hi John,
There are no ballpark figures, only arguments about them : )
FWIW, I am using a Sam James cowl with 5" round inlets and fervently
hope that they will cool my 20B.
Tracy (dangerously close to first engine start)
----- Original Message -----
Sent: Sunday, January 29, 2006 8:06
PM
Subject: [FlyRotary] Cooling air
inlets
I am modifying the cowling for the
Tailwind. The air inlet holes are 2 5/8"s x 7.5"s for a total of
app. 21.5 sq. inches. x 2 for a total of 43. I am looking at a 5
inch round hole which is the size that Same James is using for
the O-320's, which would make the diffusers easier to
fabricate. The round 5 " hole has approximately 19.3 sq inches x 2
for 38.6 sq. inches total, if my math is right. Is this a ball park
figure for the water coolers (GM evaporators) on the Mazda 13 B engine.
JohnD