[Spaceships] Winged Spaceships

scc · 04-14-2014, 07:36 PM

OK then, if I use the Merlin-1D thrust to weight ratio of 150, yielding 7.5 Gs my atmospheric speed is 1.9 mps, with a 5.74 needed for orbit I only need 3.84 mps.

Using the KVD-1's Isp of 462 I get .154 mps per tank of fuel, 15 fuel tanks will get me into orbit with room to spare (0.318 mps) carrying 190 tons of cargo (I think that can work)

Altogether this means it takes $600,000 of rocket fuel to lift 190 tons of cargo to orbit, that's $3157.89 per ton or or $1.41 per pound

04-14-2014, 07:36 PM	#28
scc Join Date: Mar 2013	Re: [Spaceships] Winged Spaceships OK then, if I use the Merlin-1D thrust to weight ratio of 150, yielding 7.5 Gs my atmospheric speed is 1.9 mps, with a 5.74 needed for orbit I only need 3.84 mps. Using the KVD-1's Isp of 462 I get .154 mps per tank of fuel, 15 fuel tanks will get me into orbit with room to spare (0.318 mps) carrying 190 tons of cargo (I think that can work) Altogether this means it takes $600,000 of rocket fuel to lift 190 tons of cargo to orbit, that's $3157.89 per ton or or $1.41 per pound