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*To*: STAR1SHIP@aol.com*Subject*: Re: starship-design: Re: FTL travel*From*: Ben Franchuk <bfranchuk@jetnet.ab.ca>*Date*: Fri, 17 Mar 2000 23:54:08 -0700*CC*: starship-design@lists.uoregon.edu*References*: <3e.1cf5a7a.2604780e@aol.com>*Reply-To*: Ben Franchuk <bfranchuk@jetnet.ab.ca>*Sender*: owner-starship-design@lists.uoregon.edu

STAR1SHIP@aol.com wrote: > The equation Power (in watts) = ISP ( impulse ) > * 9.8 ( g ) * N ( newtons of thrust ) / 2 are not used as they are ISP > equations for chemical rockets based constants determined on measured power > ratios of chemical rockets reactions vs velocity. I grabbed this equation from a Electrical Rocket description page. Power is still power.That is about 25 watts per ISP unit. 1 lb thrust for 24 hours with 1 lb of fuel is a ISP of 86,400. This is 2.160 MW's for 1 lb of thrust. But then this is the hard way of doing it since E=MV/2 for your numbers with the right conversion factor will give the power in watts. > They have no real world comparison for atomic rockets with the single > exception of some atomic rockets that expel the propellant instantaneously > (like most chemical rockets) in a very short period of time compared to > system time. The ISP measurements database does not even exist for atomic > rockets beyond poor guesswork of the 1950's. The working equations are the > ones I gave. The limiting difference in velocities is determined by momentum > needed to be overcome which approaches infinity with machines using > instantaneous acceleration. One violates (instantaneous) the laws of momentum > and the other does not. Common particle accelerators are other examples using > instantaneous acceleration. > As a believer in Auto-dynamics, SR has a momentum problem, AD does not. > > Regards, > Tom > > > > > > > starship-design@lists.uoregon.edu > > -- "We do not inherit our time on this planet from our parents... We borrow it from our children." The Lagging edge of technology: http://www.jetnet.ab.ca/users/bfranchuk/woodelf/index.html

**References**:**Re: starship-design: Re: FTL travel***From:*STAR1SHIP@aol.com

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