Free Republic
Browse · Search
General/Chat
Topics · Post Article

To: ml/nj

The ships are particle accelerators. So they are expelling mass at nearly lightspeed. There’s your propulsion, and that’s why the ship has to be kept tiny and light.


19 posted on 07/13/2009 11:12:42 AM PDT by LibWhacker (America awake!)
[ Post Reply | Private Reply | To 13 | View Replies ]


To: LibWhacker
If you expel a particle mass that weighs one microgram at the speed of light (no mean feat) its momentum would be 3x108 x 10-6 or 300 gr m/sec. A single pilot alone weighs about 75,000 grams so if he got all of the momentum to balance the expulsion his speed would increase less than half a millimeter per second. What am I missing?

ML/NJ

20 posted on 07/13/2009 11:28:07 AM PDT by ml/nj
[ Post Reply | Private Reply | To 19 | View Replies ]

Free Republic
Browse · Search
General/Chat
Topics · Post Article


FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson