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Re: Trailers

From: adrian.johnson@s...
Date: Tue, 20 Mar 2001 03:53:49 -0500
Subject: Re: Trailers

>==> I concur, though you may find because you're hauling it behind, if
you
>were going at speed, drag would possibly keep is straight behind you
>(think dragging a glider behind a plane). 

If you go *straight ahead* at speed, the trailer will stay straight
behind you thanks to air drag. If you brake, or turn, it won't stay
there any more than a glider will stay straight behind a towing plane
which slows down or turns. (Which is to say "not at all" even at
supersonic speeds, unless the glider also has a full set of maneuvering
surfaces *and* either a pilot of its own or is remote controlled from
the towing plane.)

***Adrian:  Hang on a sec, though.  A glider is on 250' of 5/8"
polypropylene rope (give or take).  A trailer is on a wee little
hitch...
There is a lot of difference between how you tow a glider and how you
tow a
trailer, and an awful lot could be done with clever *hitch* design, I'd
think.	I'm sure with some careful thought and good engineering, you
could
design a hitching mechanism that used hydraulic/pneumatic/electric
actuators to damp out unwanted swaying/pivoting of the trailer, such as
when decelerating, but still allow enough flexibility to accomodate
bumps,
etc.  Damp out unnecessary turns, and then allow turns when appropriate
-
wired into the brain of the vehicle (or doing it automatically with
gyros


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