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Dreadnought deceleration calculations  
Posted By: Vincent <danielspowage@hotmail.com>  Date: 1/24/09 9:19 a.m. 
Since Bungie were obliging enough to give us some numbers (albeit vague ones), I thought I'd try and work out a rough idea of it's deceleration. Fair warning: several assumptions from this point on. We are given that the dreadnough takes 9 days (777600 seconds) to get to Earth. It "arrives in the sol system"  I'll assume for now it starts at the edge of the system, which I'll put at just past the kuiper belt, or about 50AU (50 x 149.60 x 10^{9} metres) away. It then proceeds to Earth at "near relativistic speeds"  call it .99c (0.99 x 3.00 x 10^{8} metres/second) for now, but could be much lower  I'll assume it starts at that speed and decelerates uniformly the whole distance. Warning: maths to follow! We can work out acceleration with the formula s=ut+½at², where s=distance, u=initial speed, t=time, and a=acceleration. So: 50 x 149.60 x 10^9 = (0.99 x 3.00 x 10^{8} x 777600) + (0.5a x 777600²)
End maths What this tells us is that, assuming all assumptions are correct, the dreadnought would have had to decelerate at 739ms^{2}, or 75 times the force of gravity. You can of course change this number by changing the speed we assume it to start at, the distance it travels, etc.  this is merely an idea of the kind of numbers we're talking about. Though I do wonder why Truth took almost twice as long getting to Earth as he did travelling from High Charity...


Replies: 
Dreadnought deceleration calculations  Vincent  1/24/09 9:19 a.m. 
Re: Dreadnought deceleration calculations  urk  1/24/09 3:36 p.m. 
That's irrelevant...  stan  1/24/09 4:22 p.m. 
Re: Dreadnought deceleration calculations  BlueNinja  1/24/09 4:56 p.m. 
Re: Dreadnought deceleration calculations  SonofMacPhisto  1/24/09 5:01 p.m. 
Re: Dreadnought deceleration calculations  scarab  1/25/09 5:40 a.m. 
Re: Dreadnought deceleration calculations  Stephen L. (SoundEffect)  1/24/09 9:40 p.m. 
Re: Dreadnought deceleration calculations  Devil mingy  1/24/09 10:06 p.m. 
Re: Dreadnought deceleration calculations  Ragashingo  1/24/09 10:55 p.m. 
Re: Dreadnought deceleration calculations  SonofMacPhisto  1/25/09 12:22 a.m. 
Ah, touché *NM*  Vincent  1/25/09 3:11 a.m. 
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