jbhart(at)onlyinternet.ne Guest
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Posted: Wed Oct 06, 2010 9:24 am Post subject: Thrust to Chord Angle |
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Kolbers,
Having read that some have set the thrust vector parallel to the wing bottom
surface and then wondering what angle should the engine be set to best
performance, I thought I might relate my experience with the FireFly. At
first I built a AOA meter and measured the wing AOA at my cruse speed. Then
I washered up the rear of the engine so that the thrust line was parallel to
the relative wind. Later on, while studying the effects of power factor, I
was able to further refine the thrust angle to remove all power factor
influence at cruise.
At the time I put up a page on how it was done. They can be seen at:
http://jackbhart.com/firefly/firefly56.html
If you are interested, you can repeat the same procedure by removing all
rudder trim and using the slip indicator to help you to washer your engine
up or down to remove all power factor slip at your desired cruise speed.
When you have found that point, you can re trim the rudder to remove the
remaining slip at your desired cruise.
Jack B. Hart FF004
Winchester, IN
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