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*To*: starship-design@lists.uoregon.edu*Subject*: Re: starship-design: FTL and Special Relativity*From*: Steve VanDevender <stevev@efn.org>*Date*: Mon, 17 Jan 2000 21:16:27 -0800 (PST)*In-Reply-To*: <3883F3B5.A0456521@jetnet.ab.ca>*References*: <200001180403.XAA15573@fh105.infi.net><3883F3B5.A0456521@jetnet.ab.ca>*Reply-To*: Steve VanDevender <stevev@efn.org>*Sender*: owner-starship-design@lists.uoregon.edu

Ben Franchuk writes: > SR - speed limited by mass increase of the ship. "Relativistic mass increase" is a misnomer. It's hard to get an object up to a high fraction of c because the amount of energy needed to reach a velocity goes to infinity as the velocity approaches c, not because the object gets more massive as it approaches c. If you're the pilot of a high-velocity rocket, you don't see the fuel efficiency decrease as you go faster nor do you measure your rocket or anything else on board getting heavier. For a very lucid explanation of all this, see the section "Dialog: Use and Abuse of the Concept of Mass" in chapter 8 of _Spacetime Physics_. > AD - time does not slow down. > - speed limited to about .7C before the ships mass starts to decay. Both of these are in direct contradiction to experimental observation; moving objects _do_ show slower rates of time lapse and mass neither increases or decreases with velocity.

**Follow-Ups**:**Re: starship-design: FTL and Special Relativity***From:*Ben Franchuk <bfranchuk@jetnet.ab.ca>

**References**:**Re: starship-design: FTL and Special Relativity***From:*"Kyle R. Mcallister" <stk@sunherald.infi.net>

**Re: starship-design: FTL and Special Relativity***From:*Ben Franchuk <bfranchuk@jetnet.ab.ca>

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