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Neutral Point shift due to propeller effects

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Matt G.

Well-Known Member
Joined
Nov 16, 2011
Messages
1,315
Location
Kansas, USA
Neither Performance, Stability, Dynamics, and Control of Airplanes (Pamadi) nor Airplane Design Part 7: Determination of Stability, Control, and Performance Characteristics (Roskam), nor Perkins and Hage [The three stability and control-related books that I own) seem to have much of any useful information about the effect of thrust on the neutral point. My Stability and Control notes from college have a series of equations for the direct and indirect power effects on longitudinal stability, but unfortunately, the charts used for a couple of the terms are for a very specific WWII-era Hamilton Standard prop only (and came from some NACA report of the early to mid '40s), so they won't do me any good for the design of my scale T-28. How does one determine these things for a GA aircraft?
 
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