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Gene,,
I believe that we suck in 1/2 of the cubic inches every revolution, therefore:
360 x 2,700 / 2 = 486,000 CIM
or 486,000 / ( 12 x 12 x 12 ) = 281.25 CFM
That means that at 105 kts (our best glide and climb speed), the diameter of the air intake (d) should be:
( ( π x ( d / 2 )**2 ) / 2 ) x 105 x 1.15 * 5,280 / 60 = 281.25
or ( ( π x ( d / 2 )**2 ) / 2 ) x 10,626 = 281.25
or d = ( 281.25 / 10,626 x 2 / π )**(1/2) x 2
d = .259616 feet
or d = .259616 x 12 = 3.12 inches
and for the 320 engines at 250 CFM
we need a diameter of:
d = 2.94 inches
Lorn
From: "genemartin" <genemartin@enid.com>
Date: February 23, 2009 6:16:32 PM GMT-05:00
Does anyone know the CFM a IO360 lyc. pulls at max rpm. Thought I saw it posted once on a air filter discussion.
Gene Martin
--
Lorn H. 'Feathers' Olsen, MAA, ASMEL, ASES, Comm, Inst
DynaComm, Corp., 248-345-0500, mailto:lorn@dynacomm.us
LNC2, FB90/92, O-320-D1F, 1,533 hrs, N31161, Y47, SE Michigan
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