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Space Forum / Shuttle / September 2005CEV cabin space question
Does anyone know the maximum amount of cabin space the new CEV will have for the astronauts to occupy? Anyone know what the dimensions of the CEV crew cabin will be or know of a website when I can find this information? I wonder if it will be as big as the space shuttle crew cabin. Ray > Does anyone know the maximum amount of cabin space the new CEV will > have for the astronauts to occupy? Anyone know what the dimensions of > the CEV crew cabin will be or know of a website when I can find this > information? I wonder if it will be as big as the space shuttle crew > cabin. Those details don't appear to have been established, yet. The nominal crew for a lunar mission is four, but I would expect the CEV is large enough to carry six, and in an emergency, eight. It's certainly larger than Apollo and for a crew of four, it might have as much per-person cubage as Shuttle. I haven't seen any interior art, so I presume it's a single flight deck. One hopes the sanitary facility will have >some< privacy, if only a curtain. This assumes the CEV is a cone like Apollo, and not a lifting body design like Lockheed-Martin's: http://www.lockheedmartin.com/data/assets/10189.gif For comparison, Kliper looks very roomy and has a separate Soyuz-style orbital module in its rear. http://www.russianspaceweb.com/kliper.html --Damon > Those details don't appear to have been established, yet. The > nominal crew for a lunar mission is four, but I would expect the > CEV is large enough to carry six, and in an emergency, eight. Not quite an assumption one can make here. For the shuttle, the weight of an extra astronaut is not very significant compared to the totall mass and wing lift capacity. And pilots can somewhat compensate during final landing by having the node slight more up to reduce rate of descent during last few feet. A capsule with extra weight may not be able to safely land on ground if its parachutes and final landing engines would not be strong enough. Would water landings allow overweight landings safely ? > Does anyone know the maximum amount of cabin space the new CEV will > have for the astronauts to occupy? Anyone know what the dimensions of the > CEV crew cabin will be or know of a website when I can find this > information? I wonder if it will be as big as the space shuttle crew > cabin. According to one statement by Griifin 3 times the volume but only 50% more mass the Apollo capsule. If this is accurate it would be aprox 18 m3 and 9,000 kg Yes on paper sure. I am sure that the designer have already huge mass headaches. Large capsule leads to snowball effect on descent and landing system. I still cannot figure out why this capsule of this size. Why do you need to bring back say the toilets and the galley ? Why not do a Soyuz type spacecraft with a smaller capsule limited to bringing back the six crew and everything which is not mandatory for reentry is destroyed in an expendable pressurized upper module. >Yes on paper sure. I am sure that the designer have already huge mass >headaches. Large capsule leads to snowball effect on descent and >landing system. Note that internal *volume* has almost no effect on those things. Just making the capsule bigger causes very little mass gain, unless you then fill the extra space with more equipment.  Signaturespsystems.net is temporarily off the air; | Henry Spencer mail to henry at zoo.utoronto.ca instead. | henry@spsystems.net it will be interesting to see the differnaces between the new cev and McDonnell Douglas 6 man Big G version of the Gemini big, |
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