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Old 23-05-2005, 10:43 AM
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ving (David)
~Dust bunny breeder~

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Join Date: Nov 2004
Location: The town of campbells
Posts: 12,359
Quote:
Originally posted by slice of heaven
The answer is still no. The tiny rocket part was a joke. lol
I might do a search after and try and find a full detailed description of the thrust equation to explain it.
I used to play with model rockets when I was a kid and it is easy to understand.
The size of the exhaust nozzle is critical.
Never had a toy jet though. But i think the adjustable exhaust nozzle on the jets is for the afterburners. They are opened for the afterburners and closed for the normal operation. The afterburners are only a series of injecters squirting fuel directly into the exhaust ,therefore needing a larger exhaust nozzle.
cool! science experiment time!!

you need:
  • 1 pingpong ball
  • 1 straw
  • 1 3" diameter pvc tube or other similar tube

place the ball on a flat surface and blow thru the straw at it, taking note at velocity achieved at lung presure exerted. now grab the 3" tube and repeat useing the exact same pressure.
the force coming out of the 3" tube is substantially less than the straw and the ball moves less.

Dr Ving says lesson over.
interestign topic peoples!
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