I hope the Dream Chaser gets hot fire tests on 2 different makes of launch vehicle. Cheaper than 2 actual launches but the payload interfaces still get developed.
Quote from: A_M_Swallow on 07/09/2012 12:00 amI hope the Dream Chaser gets hot fire tests on 2 different makes of launch vehicle. Cheaper than 2 actual launches but the payload interfaces still get developed.Not required. If they are developed for one, they are developed for the others since most launch vehicles EELV SIS so that they can get USAF and NASA contracts. They can pick between 62 inch standard interface, 66, 47, and 37 inch adapters and 37 and 61 pin connectors.
Quote from: Jim on 07/09/2012 12:03 amQuote from: A_M_Swallow on 07/09/2012 12:00 amI hope the Dream Chaser gets hot fire tests on 2 different makes of launch vehicle. Cheaper than 2 actual launches but the payload interfaces still get developed.Not required. If they are developed for one, they are developed for the others since most launch vehicles EELV SIS so that they can get USAF and NASA contracts. They can pick between 62 inch standard interface, 66, 47, and 37 inch adapters and 37 and 61 pin connectors. I doubt either the DreamChaser or CST-100 could launch on a Falcon 9 (not enough launcher) or Liberty (not enough LAS). Only the relatively light-weight Dragon can switch to a ULA LV, but still not Liberty. Maybe Dreamchaser can look to launch on a F9 v2.0 (not v1.1), but there aren't many domestic human-rated alternatives to the Atlas V 402 / 412.
Indeed. v1.1 should be capable enough for DC or CST, in the very unlikely event it would be needed.
How much to develop a spacecraft adapter, wind tunnel testing, and crew access tower for a launcher you will never use ??Or will SpaceX provide these services for free, just to win the additional business ?
I doubt either the DreamChaser or CST-100 could launch on a Falcon 9 (not enough launcher) ......Maybe Dreamchaser can look to launch on a F9 v2.0 (not v1.1), but there aren't many domestic human-rated alternatives to the Atlas V 402 / 412.
Quote from: baldusi on 07/08/2012 03:18 pmQuote from: rmencos on 07/07/2012 04:46 pmGetting closer to a NASA decision. I bet on SpaceX, Boeing and Sierra Nevada Corp. to come through - - - but wait, here comes ATK flailing its arms and making a case to anyone who will listen (although only a few select NASA individuals are the ones that count). It's a great competition and I'm glad to be a spectator. Historic really.I can't really stress how much more interesting it becomes when you have L2 subscription. I'm sorry I can't go into specifics, but thrust me. It's extremely interesting.shameless plug: Yes L2 is worth the investment.
Quote from: rmencos on 07/07/2012 04:46 pmGetting closer to a NASA decision. I bet on SpaceX, Boeing and Sierra Nevada Corp. to come through - - - but wait, here comes ATK flailing its arms and making a case to anyone who will listen (although only a few select NASA individuals are the ones that count). It's a great competition and I'm glad to be a spectator. Historic really.I can't really stress how much more interesting it becomes when you have L2 subscription. I'm sorry I can't go into specifics, but thrust me. It's extremely interesting.
Getting closer to a NASA decision. I bet on SpaceX, Boeing and Sierra Nevada Corp. to come through - - - but wait, here comes ATK flailing its arms and making a case to anyone who will listen (although only a few select NASA individuals are the ones that count). It's a great competition and I'm glad to be a spectator. Historic really.
Quote from: Prober on 07/08/2012 04:36 pmQuote from: baldusi on 07/08/2012 03:18 pmQuote from: rmencos on 07/07/2012 04:46 pmGetting closer to a NASA decision. I bet on SpaceX, Boeing and Sierra Nevada Corp. to come through - - - but wait, here comes ATK flailing its arms and making a case to anyone who will listen (although only a few select NASA individuals are the ones that count). It's a great competition and I'm glad to be a spectator. Historic really.I can't really stress how much more interesting it becomes when you have L2 subscription. I'm sorry I can't go into specifics, but thrust me. It's extremely interesting.shameless plug: Yes L2 is worth the investment.Could ATK stay in if they remain unfunded?
Quote from: PeterAlt on 07/09/2012 03:45 amQuote from: Prober on 07/08/2012 04:36 pmQuote from: baldusi on 07/08/2012 03:18 pmQuote from: rmencos on 07/07/2012 04:46 pmGetting closer to a NASA decision. I bet on SpaceX, Boeing and Sierra Nevada Corp. to come through - - - but wait, here comes ATK flailing its arms and making a case to anyone who will listen (although only a few select NASA individuals are the ones that count). It's a great competition and I'm glad to be a spectator. Historic really.I can't really stress how much more interesting it becomes when you have L2 subscription. I'm sorry I can't go into specifics, but thrust me. It's extremely interesting.shameless plug: Yes L2 is worth the investment.Could ATK stay in if they remain unfunded?That question has been answered by ATK themselves on multiple occassions
Quote from: Lurker Steve on 07/09/2012 12:28 amQuote from: Jim on 07/09/2012 12:03 amQuote from: A_M_Swallow on 07/09/2012 12:00 amI hope the Dream Chaser gets hot fire tests on 2 different makes of launch vehicle. Cheaper than 2 actual launches but the payload interfaces still get developed.Not required. If they are developed for one, they are developed for the others since most launch vehicles EELV SIS so that they can get USAF and NASA contracts. They can pick between 62 inch standard interface, 66, 47, and 37 inch adapters and 37 and 61 pin connectors. I doubt either the DreamChaser or CST-100 could launch on a Falcon 9 (not enough launcher) or Liberty (not enough LAS). Only the relatively light-weight Dragon can switch to a ULA LV, but still not Liberty. Maybe Dreamchaser can look to launch on a F9 v2.0 (not v1.1), but there aren't many domestic human-rated alternatives to the Atlas V 402 / 412.F9 v2.0 does not exist as plans.
Their second stage is not as capable as the dual-engine Centaur that the spacecraft launching on Atlas have baselined.
Quote from: Lurker Steve on 07/09/2012 04:22 amTheir second stage is not as capable as the dual-engine Centaur that the spacecraft launching on Atlas have baselined. For purposes of injecting the payload to LEO only, how is it not as capable? Where are your numbers? There is too much armwaving going on around here.
Quote from: ugordan on 07/09/2012 07:23 amQuote from: Lurker Steve on 07/09/2012 04:22 amTheir second stage is not as capable as the dual-engine Centaur that the spacecraft launching on Atlas have baselined. For purposes of injecting the payload to LEO only, how is it not as capable? Where are your numbers? There is too much armwaving going on around here.Lower impulse, heavier weight, both make the Falcon upper stage less capable than the Centaur. This is not blasting the Falcon, it is pointing out the comparisons between the two.
To compensate for the lower upper stage performance, Falcon has a significant edge in first stage performance.
Could ATK stay in if they remain unfunded?
Huh? Silly question. They can do anything they want. Nobody on the outside can stop them.