[NSRCA-discussion] Design Question

patterndude at tx.rr.com patterndude at tx.rr.com
Mon Nov 9 13:38:04 AKST 2009


That's all?  There a number of design issues we face in pattern where there's little documentation readily available. This is one, KE flight is another, wing incidence and engine thrustline effects in 4 axis flight is another. The more I think about it the more I think of. 
  There's no one answer and anything between the chordline and thrustline can be made to work by changing rudder shape and incidence. I settled on a quarter inch above the chordline and then adjusted the rudder to allow a trim incidence near zero so inverted flight is more effortless. 

Lance
AeroSlave
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-----Original Message-----
From: "J N Hiller" <jnhiller at earthlink.net>
Date: Mon, 9 Nov 2009 09:36:13 
To: NSRCA Mailing List<nsrca-discussion at lists.nsrca.org>
Subject: [NSRCA-discussion] Design Question

Hello all.
Here's a topic for discussion that I'm personally very interested in and may
be of interest to others.
I'm working up a new pattern design and would appreciate comments regarding
the vertical placement of the wing and thrust line relative to the stab
centerline.
I not only would like to know what the vertical offset is on modern pattern
designs but how the vertical location affects flight trim, and why?
Thanks all.
Jim Hiller



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