I think I got it...:)
You are talking about the brake horsepower that the engine supplies and the
blade converts it into thrust horsepower or lift, when talking about wings.
The "twist" maximizes the efficiency,which varies anywhere between 50 and 87%,
depending how much the propeller slips.
What you call the angle of incidence, my fella tha Murkans know as simply the
blade angle, not to be confused with the geometric blade pitch, which is the
distance a propeller should advance in one revolution, or the effective blade
pitch, which is the distance the propeller actually advances, simply called a
slip.
Yep, I got it....:)
Boris
From: Chris Barker <ftog@xxxxxxxxxxxxxxxx>
Subject: [OM] Re: #225
Date: Mon, 18 Jul 2005 17:56:28 +0100
By the way, the way a wing (or prop blade) is set is called angle of
incidence. Angle of attack is the angle between a aerofoil's chord
line and the relative air flow; incidence is static, attack dynamic.
Geddit? ;-)
Chris
~~ >-)-
C M I Barker
Cambridgeshire, Great Britain.
+44 (0)7092 251126
www.threeshoes.co.uk
homepage.mac.com/zuiko
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