It has just come to me !

Change the angle of inclination ov the track such that it is
perpendicular to a level plane ! This should then assure you of maximum
acceleration with no added weight so the whole of the weight budget can
be devoted to minimizing friction with the guide rail and the air.
Better till do away with the air this would negate even more ov the
friction. Hence the only thing to worry about is the friction between
the sled and guide rail !

(pulse jet wont work in a vacuum) you may need solid fuel booster !

Steve.....

-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Mike Singer
Sent: 09 January 2004 17:19
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [EE:] Sled propulsion

Jinx wrote:
> > A snowy hill usually works.
>
> Ah-ha, the obvious. Specify that proper operation is not
> guaranteed away from the Cresta Run or Aspen

   Does anybody remember IBM-360 hard disk drives with
the great linear drives? Cylinder magnet and a sled inside.
   Few of them lined up will look awfully (though not as awfully
as new NASA's underground launcher project)

Mike.

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