Quote from: kyle_baron on 12/24/2009 04:17 pmThat's exactly my point. I realize that T.O. will always be part of a SRM. However, the "shake its passengers to death" requires additional inputs (similar frequencies) from the rest of the rocket. IMO, the similar frequencies will not happen, because the stages and interfaces, have different materials, all vibrating at different frequencies.It will not happen because we will not allow it to happen. You can't sit back and think 'oh, it will never happen' because then it surely does. I intend to make sure it does not happen by putting this specific environment (and several others of similar concern) in the SRD of this new vehicle.
That's exactly my point. I realize that T.O. will always be part of a SRM. However, the "shake its passengers to death" requires additional inputs (similar frequencies) from the rest of the rocket. IMO, the similar frequencies will not happen, because the stages and interfaces, have different materials, all vibrating at different frequencies.
I figure the astronauts at 200 lbs. each X 4 = 800 lbs.
Even if they fixed it some points remain valid:1. Ares 1 costs an obscene amount of money to develop and would cost alot of money for each mission (each new rocket). 2. If they must add new parts or modules to fix the issue then they are adding weight further reducing preformance (and its not great as it is since ares 1 cannot actually put orion in orbit (the sm engine must complete the launch burn))3. Whatever they add requires additonally R&D perhaps an additional test flight and it adds money in and of itself.
Quote from: kyle_baron on 12/24/2009 10:15 pmI figure the astronauts at 200 lbs. each X 4 = 800 lbs. For the shuttle, it is 450 lbs per crew.
1. Of course it will cost a lot of money to develope, test, and qualify. IT'S A BRAND NEW ROCKET. IIRC, the cost of each mission is only $200-$500 million, and it will be, the safest rocket.2. There is plenty of mass margin for the T.O. mitigation, as I stated previously,with the new friction-welding process. The SM engine will have enough propellent for LEO and EOI.3. Maybe, but over the 30-40 yr. life span of the program, that's small peanuts.
Quote from: Jim on 12/26/2009 03:23 pmQuote from: kyle_baron on 12/24/2009 10:15 pmI figure the astronauts at 200 lbs. each X 4 = 800 lbs. For the shuttle, it is 450 lbs per crew.Does that number include the reentry suits mass as well or is that a separate allotment?
Thanks for the answer Jim!
... this appears to be Danny's data, not released directly by NASA....
Just to help my understanding:Food and O2 for how many days? Are the oxygen tanks not included?