[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

*To*: Timothy van der Linden <T.L.G.vanderLinden@student.utwente.nl>*Subject*: Re: OK, here the right calculus (I hope)*From*: Kevin C Houston <hous0042@maroon.tc.umn.edu>*Date*: Tue, 2 Apr 1996 15:53:26 -0600 (CST)*cc*: KellySt@aol.com, kgstar@most.fw.hac.com, stevev@efn.org, jim@bogie2.bio.purdue.edu, zkulpa@zmit1.ippt.gov.pl, rddesign@wolfenet.com, David@InterWorld.com, lparker@destin.gulfnet.com, DotarSojat@aol.com*In-Reply-To*: <199603300114.AA05967@student.utwente.nl>

On Sat, 30 Mar 1996, Timothy van der Linden wrote: > Optimal solution for a maser deceleration starship. The starship carries all > the necessary repulsion mass and gets the energy needed to accelerate the > repulsion mass from the maser. > > To do this we want to find the solution that consumes the least energy. <Equations snipped> > The minima are: > > Vstart Vexh optimal Fuel:ship-ratio Energy per kg of ship (in Joules) > 0.1 0.062 5.36 7.45E14 > 0.2 0.121 5.84 3.25E15 > 0.3 0.180 6.40 8.11E15 > 0.4 0.240 7.06 1.64E16 > 0.5 0.300 7.87 2.97E16 > 0.6 0.364 8.91 5.23E16 > 0.7 0.433 10.38 9.21E16 > 0.8 0.512 12.72 1.73E17 > 0.9 0.615 17.75 4.04E17 > 0.99 0.803 52.00 3.12E18 > 0.9996 0.906 238.81 2.91E19 > So you're saying that a Maser Augmented Rocket System (MARS) _will_ work? do I have that correct. That we can use maser sail to accelerate at 1G constant, then convert the Microwave energy to elec. to accelerate Reaction Mass (RM) to about .803 C and we will need 52 times the ships dry mass for RM. Celebratory cheers pending confirmation. > Note that the power of the maser-beam is NOT constant, it is supposed that > it decreases while the ship gets lighter (because it repulses mass). If it's not too much trouble, can you figure this for a constant maser beam How much extra RM will we need? A decreasing maser beam is possible, it's only a time delay calculation, but a constant beam would solve some engineering problems and which time frame do I use to figure the energy of the Maser beam? ship's time or earth's time? Kevin

**References**:**OK, here the right calculus (I hope)***From:*T.L.G.vanderLinden@student.utwente.nl (Timothy van der Linden)

- Prev by Date:
**Re: Broken Draft on New Lit Server** - Next by Date:
**Re: OK, here the right calculus (I hope)** - Prev by thread:
**OK, here the right calculus (I hope)** - Next by thread:
**Re: OK, here the right calculus (I hope)** - Index(es):