Hi Marty,
Why use a top rotor?
Mark
To: Indoor_Construction_at_yahoogroups.com
From: mda35_at_cornell.edu
Date: Wed, 30 Mar 2011 23:07:19 -0400
Subject: [Indoor_Construction] Re: SO Helicopter
This has been interesting, and in the spirit of interesting things, how
about this: Everything I have read here has been passive. How about an
active system analogous to a variable pitch prop being an active
system? Suppose the base of the post sticking up from the top rotor was
somehow attached to a small lever arm such that whenever it was pressed
into the rotor (by the post bumping the ceiling or a beam ... NOT
hanging up) it hooked onto the motor stick and stopped the top rotor;
and whenever it dropped away from the ceiling a small spring pushed the
lever away from the top rotor allowing the top rotor to spin again. I
think such a system would be hard to make (but probably no harder then
the first VP props), and flight might be somewhat unstable, but this
might be the ticket in low to moderate ceilings. I am picturing
something totally within the helicopter and totally aerodynamic in
nature. Hmmmmmm. Any thoughts?
Best,
Marty
--
Marty Alderman
Physics Teacher!
Cornell University Visiting Faculty
2007-9, 2010-11 Cornell PhysTEC TIR (Teacher In Residence)
128 Clark Hall, Cornell University, Ithaca, NY 14853
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mda35_at_cornell.edu
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Most teachers answer it emphatically:
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Received on Wed Mar 30 2011 - 21:20:09 CEST