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 Dreadnought deceleration calculations Posted By: Vincent 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 109 metres) away. It then proceeds to Earth at "near relativistic speeds" - call it .99c (0.99 x 3.00 x 108 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 108 x 777600) + (0.5a x 777600²) 7480000000000 = 230947200000000 + 302330880000a -223467200000000 = 302330880000a a = -739ms-2 ----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.