Re: Re: SO plane possessed?
Yes - incidence changes will make a big difference if the static stability margin is too low. In an extreme case the model will either stall or dive with nothing in-between.
Yes - 1.5 times altitude and time is the theory.
----- Original Message -----
From: torqueburner
To: Indoor_Construction_at_yahoogroups.com
Sent: Sunday, April 16, 2006 10:19 AM
Subject: [Indoor_Construction] Re: SO plane possessed?
--- In Indoor_Construction_at_yahoogroups.com, "Bill Gowen" <wdgowen@...> wrote:
>
> Dave
> It sounds to me like you're right on the edge with the static stability margin.
Thanks, Bill - that makes sense. We had noticed that the cg is way back for this plane, but
the student built it pretty beefy, ended up right at 8 grams, and he had no way to shift the cg
forward, so we decided just to try flying it. Initially, it flew fine, so we didn't think it was a
problem. . . I'm guessing that in this condition, the plane would be very sensitive to small
incidence changes?
> Are you using a dummy motor for the other 1/3 of the motor length? If not the short motor
could bend the MS enough to cause problems.
Yes, we are. The dummy stick is 1/3 of the hook to hook length and 1/3 the mass of a whole
motor. And am I correct, that a full loop should fly about 1.5 times as high, and as long, as a
2/3 loop wound and launched the same, with the same trim?
Dave Drummer
Kutztown Sr. High School
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Received on Sun Apr 16 2006 - 10:09:36 CEST
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:44 CET