"DAVID WILLIAMS" bravely wrote to "MIKE ROSS" (07 Jun
05  17:49:54) 
 --- on the heady topic of "Pnu 732" 
 
 DW> Momentum/energy = MV/(.5MV^2) = 2/V. If V the force produced per watt must be greater than a "photon rocket" 
 DW> produces. 36uN/3nN = 12000, so I suppose Deep Space 1's thruster must 
 DW> eject its exhaust at about 1/12000 of the speed of light, or 3e8/1.2e4 
 DW> or 2.5e4 metres per second. 25 km/s. That's pretty fast! 
 
Yes it is and more amazing that 90 milli-Newtons is equivalent to the 
force exerted by a sheet of paper resting on the palm of one's hand. 
DS-1 ended its mission some years ago and it was a proving ground for 
about a dozen new technologies. 
 
 M*i*k*e 

... Don't put your remaining good eye in the path of the laser!-
--- Blue Wave/DOS v2.30