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Floating arm trebuchet

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Author: davidz

Group: Default

Filesize: 498.75 kB

Date added: 2012-06-29

Rating: 5.6

Downloads: 2815

Views: 998

Comments: 2

Ratings: 2

Times favored: 0

Made with: Phun

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Just a floating arm version of my triple arm trebuchet. It has pretty reasonable masses - 1 kg projectile, 200 kg counterweight.
I managed to get over 60% efficiency :y
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s_noonan
2012/06/30 10:36:14
Very nice. :tup: :tup: How do you measure efficiency? When calculating (total energy gained by projectile at release)/(total energy lost by trebuchet), I get 77%. It appears that the trebuchet is 97% efficient at release and then looses another 20% settling down after the throw.
Last edited at 2012/06/30 11:53:58 by s_noonan
davidz
2012/06/30 13:27:42
Thnaks! I divided projectile kinetic energy by potential energy lost by counterweight, but total energy lost by system seems to be a better measure.

I'm still trying to build supersonic treb with reasonable masses and dimensions, but enormous amouts of energy are lost in last arm unless it's very light.