piclist 2001\01\18\184723a >
Thread: Rocket Altimeter Project
www.piclist.com/techref/index.htm?key=rocket+altimeter
face picon face BY : Sean H. Breheny email (remove spam text)



Hi all,

A few weeks ago, I asked several questions on here about a rocket altimeter
project that I was working on. Well, I finally built and tested it, and the
preliminary results are at

http://www.people.cornell.edu/pages/shb7/alt.html

Unfortunately, I don't have time right now to put all the stuff I have up
onto the page (like video, code, schematic), so all I have right now are a
text explanation and data graphs. In a week or so I should have the other
stuff up there.

Overall, it was quite successful in that it gave data that makes sense. One
interesting thing is that I observed some strange engine behavior. On the
first test, the engine had about 30% less thrust than it was supposed to,
and on the second test, the engine exploded on the pad (but didn't damage
the altimeter). Do any of you rocket gurus have any idea why? The engines I
used were about 4 or 5 years old, could that be why? Right now I am kicking
myself for putting this much effort into it and then not buying a $6 pack
of new engines :-)

Thanks again for your help,

Sean

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