George;
Determining the
area of the opening of a circular butterfly with position is certainly complex
enough; but the flow is likely not directly proportional because of the
complexities of the flow characteristics and pressure changes. I would
think measuring it is really the only way. Do you have access to a flow
bench?
Sorry; probably not
very helpful,
Al
G
-----Original
Message-----
From: Rotary
motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of George Lendich
Sent: Friday, September 21, 2007 9:21
PM
To: Rotary motors in
aircraft
Subject: [FlyRotary]
Area of a circle
I am trying to work out the area
of carb inlet as it is opened incrementally.
This involves the overlapped
portion of two circles, as well as, a circle cut into slices ( straight
cuts).
This should give me an indication
of the linier or otherwise, volume of air as it sweeps through the
carb.
This then should indicate the
shape of the grind of the needle in maintaining continuity of the mixture
ratio of fuel to air.
Any helpers with this
one!?