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Path: utzoo!decvax!harpo!eagle!allegra!linus!genrad!wjh12!n44a!ima!inmet!ramsey
From: ramsey@inmet.UUCP
Newsgroups: net.physics
Subject: Re: Orphaned Response - (nf)
Message-ID: <86@inmet.UUCP>
Date: Thu, 2-Jun-83 05:39:14 EDT
Article-I.D.: inmet.86
Posted: Thu Jun  2 05:39:14 1983
Date-Received: Wed, 8-Jun-83 23:54:03 EDT
Lines: 14

#R:sri-arpa:-156400:inmet:7600001:177600:584
inmet!ramsey    Jun  1 13:44:00 1983

There are no aerodynamic factors which prevent helicopters from looping,
only mechanical ones.  Most helicopters are not designed to tolerate
excessive negative g-forces (which could result from a sloppily executed
loop).  A mistake could result in the main rotor striking some other
portion of the helicopter (like the tail boom or rotor) with clearly
disasterous results.  Some helicopters use what are referred to as
'rigid' rotor blades (the blades themselves are flexible, the hub is
what is rigid).  Some of these machines are quite capable of looping
and rolling.

Marc Ramsey