Re: Marathon's Cruising Speed


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Re: Marathon's Cruising Speed

Posted By: Forrest of B.org Date: 4/16/13 1:10 a.m.
In Response To: Re: Marathon's Cruising Speed (vonzwietracht)

: Mabey I can make this my next reason to use a calculator: how much force
: would be needed to launch deimos into a solar orbit that leads to deimos
: exiting the solar system at around .039c
One thing to factor in is that the Marathon was driven by a Bussard ramjet and so was continually accelerating the entire time in transit, scooping up fuel from the interstellar medium as it went. So it's not just a matter of launching it from Sol at its average cruising speed; it's a matter of launching it at a speed which, taking into account continuing acceleration (which we'd have to calculate separately, factoring in things like the density of the interstellar medium plus all the technicalities of the hypothetical drive mechanism), leaves its average cruising speed as such (meaning much greater cruising speed by mid-journey, before it has to start braking).

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Pre-2004 Posts

Replies:

Marathon's Cruising Speed VonZwietracht 4/15/13 3:31 p.m.

Re: Marathon's Cruising Speed Hopper 4/15/13 4:44 p.m.

Re: Marathon's Cruising Speed VonZwietracht 4/15/13 4:59 p.m.

Re: Marathon's Cruising Speed Forrest of B.org 4/15/13 7:50 p.m.

Re: Marathon's Cruising Speed vonzwietracht 4/15/13 11:21 p.m.

Re: Marathon's Cruising Speed Forrest of B.org 4/16/13 1:10 a.m.

Re: Marathon's Cruising Speed treellama 4/16/13 3:44 a.m.

Re: Marathon's Cruising Speed Bob-B-Q 4/16/13 4:25 a.m.

Re: Marathon's Cruising Speed Godot 4/16/13 12:03 a.m.

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Pre-2004 Posts

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: One thing to factor in is that the Marathon was driven by a Bussard ramjet : and so was continually accelerating the entire time in transit, scooping : up fuel from the interstellar medium as it went. So it's not just a matter : of launching it from Sol at its average cruising speed; it's a matter of : launching it at a speed which, taking into account continuing acceleration : (which we'd have to calculate separately, factoring in things like the : density of the interstellar medium plus all the technicalities of the : hypothetical drive mechanism), leaves its average cruising speed as such : (meaning much greater cruising speed by mid-journey, before it has to : start braking).

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Marathon's Cruising Speed	VonZwietracht	4/15/13 3:31 p.m.
Re: Marathon's Cruising Speed	Hopper	4/15/13 4:44 p.m.
Re: Marathon's Cruising Speed	VonZwietracht	4/15/13 4:59 p.m.
Re: Marathon's Cruising Speed	Forrest of B.org	4/15/13 7:50 p.m.
Re: Marathon's Cruising Speed	vonzwietracht	4/15/13 11:21 p.m.
Re: Marathon's Cruising Speed	Forrest of B.org	4/16/13 1:10 a.m.
Re: Marathon's Cruising Speed	treellama	4/16/13 3:44 a.m.
Re: Marathon's Cruising Speed	Bob-B-Q	4/16/13 4:25 a.m.
Re: Marathon's Cruising Speed	Godot	4/16/13 12:03 a.m.



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	Message: : One thing to factor in is that the Marathon was driven by a Bussard ramjet : and so was continually accelerating the entire time in transit, scooping : up fuel from the interstellar medium as it went. So it's not just a matter : of launching it from Sol at its average cruising speed; it's a matter of : launching it at a speed which, taking into account continuing acceleration : (which we'd have to calculate separately, factoring in things like the : density of the interstellar medium plus all the technicalities of the : hypothetical drive mechanism), leaves its average cruising speed as such : (meaning much greater cruising speed by mid-journey, before it has to : start braking).
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