Can water be transported in a special container in the unpressurised trunk?I believe that was the method in ATV.Seems like a waste of much needed volume to put it in bags inside the small capsule.
Water weighs 1 ton per cubic meter. It's a solid material rather than hollow cases & circuit board racks. It's the heaviest thing per volume around.
Quote from: Burninate on 02/26/2015 07:52 amWater weighs 1 ton per cubic meter. It's a solid material rather than hollow cases & circuit board racks. It's the heaviest thing per volume around.It's the densest consumable the ISS needs in significant quantities. It is -far- from the heaviest thing around. If it were, ships would never sink in it.It has the advantage, however, of being highly recyclable, so the ISS only needs to replenish what gets wasted. If the ISS didn't have extreme recycling going on, they would require far more supplies than they currently do.
Quote from: dror on 02/26/2015 06:59 amCan water be transported in a special container in the unpressurised trunk?I believe that was the method in ATV.Seems like a waste of much needed volume to put it in bags inside the small capsule.Water weighs 1 ton per cubic meter. It's a solid material rather than hollow cases & circuit board racks. It's the heaviest thing per volume around.
That's Irrelevant, it's still a wasted volume in the cabin and dragon is volume limited.If they need to certify a water container, a barrel in the trunk seems like a good alternative.The biggest disadvantage may be the crew time needed to unpack it with the robotic arm.
Elon Musk @elonmuskUpgrades in the works to allow landing for geo missions: thrust +15%, deep cryo oxygen, upper stage tank vol +10%
So if S2 is ~14m, this is a ~1m stretch. How significant is this for GSE, can they support this by just lengthening some umbilicals for the payload, or do they have to do more?
At what point does it graduate to v1.2?
At first, I thought it was a stretch of the first stage tanks not the second. I think stretching the upper stage is less of a big deal because the upper stage is much smaller to begin with, though it should help the performance significantly (especially to high energy).
A tweet from Musk about F9 performance upgrades coming soon: (we already knew about the densification and M1D thrust upgrade, but the upper stage stretch(?) is new)https://twitter.com/elonmusk/status/572257004938403840QuoteElon Musk @elonmuskUpgrades in the works to allow landing for geo missions: thrust +15%, deep cryo oxygen, upper stage tank vol +10%
Here's to a year that's boring when it's supposed to be boring and still exciting when it's supposed to be exciting...