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!?