I have been using Bernie hunt's program to see what the affect of varying the boom length might be. The version of the program I have has Steve Brown's F1D entered into it.
The only parameter I changed was boom length. For the purposes of this experiment I did not change the boom weight. The result was as follows:
Shortening the boom 1" (from 19.5" to 18.5") increased the time & reduced the static stability margin.
Lengthening the boom 1" (from 19.5" to 20.5") decreased the time & increased the static stability margin.
I was expecting a longer boom to increase time because I thought that the decalage (angle of attach difference between wing & stab) would be less with the stab farther back. Also, with the weight of the stab farther back I thought the CG would be closer to the neutral point & the static stability margin would be less. I would like to hear your opinions on the affect of boom length. And, yes I know that a longer boom length might require a heaver boom, but not necessarily.
Thanks,
Gary Hodson
Received on Fri Feb 24 2012 - 05:44:44 CET
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