No requirement for such missions
Quote from: Jim on 08/31/2011 08:12 pmNo requirement for such missionsWhy? Do we have enough data on the long-term effects of Mars gravity on the human body (or any low gravity environment)?
Quote from: AlexCam on 08/31/2011 08:18 pmQuote from: Jim on 08/31/2011 08:12 pmNo requirement for such missionsWhy? Do we have enough data on the long-term effects of Mars gravity on the human body (or any low gravity environment)?Why would we need that? We're not going to Mars, not before the end of this century.
Going with a high ball figure of 3 rpm for the angular velocity the radius could be 32 meters.
Quote from: Patchouli on 08/31/2011 08:37 pmGoing with a high ball figure of 3 rpm for the angular velocity the radius could be 32 meters.At 3 rpm vertigo will occur in most subjects. 1 rpm is what we should strive for.
Quote from: AlexCam on 08/31/2011 08:49 pmQuote from: Patchouli on 08/31/2011 08:37 pmGoing with a high ball figure of 3 rpm for the angular velocity the radius could be 32 meters.At 3 rpm vertigo will occur in most subjects. 1 rpm is what we should strive for.Lowest quote I seen was 2 rpm which was suggested by Robert R. Gilruth in 1969.A 74M radius could provide this but you may loose the option of a rigid truss.The 3 rpm figure I used was arrived at by D. Bryant Cramer in 1985.1 rpm is doable but you'll have to use a tether.
I would think a tether is preferable anyway. Practically no mass requirement or structural problems with it.
It's a fairly cheap experiment. It's still novel and the data gained is valuable, at least as far as I see it. Humans will go to Mars at some point. Knowing how quickly (or if) we adapt to Mars gravity is quite important.
Quote from: AlexCam on 08/31/2011 08:25 pmIt's a fairly cheap experiment. It's still novel and the data gained is valuable, at least as far as I see it. Humans will go to Mars at some point. Knowing how quickly (or if) we adapt to Mars gravity is quite important.It isn't cheap and no one has the money for it.
Quote from: Jim on 08/31/2011 08:12 pmNo requirement for such missionsHow biological systems react to zero, and low g's (less than 1g) is still a big unknown. Of course we know so little, that even doing the experiments on mice would fill in many of the gaps.If there was no need for this data, Japan would never have built the now canceled ISS, Centrifuge Accommodations Module for smaller bio experiments.
The experiment would be more then covered by the cost of one day of the Iraq war.
Quote from: kevin-rf on 09/01/2011 12:36 amQuote from: Jim on 08/31/2011 08:12 pmNo requirement for such missionsHow biological systems react to zero, and low g's (less than 1g) is still a big unknown. Of course we know so little, that even doing the experiments on mice would fill in many of the gaps.If there was no need for this data, Japan would never have built the now canceled ISS, Centrifuge Accommodations Module for smaller bio experiments.Didn't say that research wasn't needed just the mission defined on this thread.
Quote from: Jim on 09/01/2011 02:52 amQuote from: kevin-rf on 09/01/2011 12:36 amQuote from: Jim on 08/31/2011 08:12 pmNo requirement for such missionsHow biological systems react to zero, and low g's (less than 1g) is still a big unknown. Of course we know so little, that even doing the experiments on mice would fill in many of the gaps.If there was no need for this data, Japan would never have built the now canceled ISS, Centrifuge Accommodations Module for smaller bio experiments.Didn't say that research wasn't needed just the mission defined on this thread.Do you know alternative methods to gain insights on the effects of long-term Mars gravity exposure to humans?
Do you know alternative methods to gain insights on the effects of long-term Mars gravity exposure to humans?
zero g effects
Have there been concepts of such an experiment/mission yet?
Quote from: Jim on 09/01/2011 01:31 pmzero g effectsNot required if a long-term artificial gravity experiment proves to be successful.
Have there been concepts of such an experiment/mission yet? Basically a small Salyut-type space station module as a free-flyer that is put into spin with a tether to the upper stage of the rocket that put it in orbit or some other counterweight. Crew of 2 (or more) dock with the module and start the spinning to simulate Mars gravity. Crew stays there for several months to study the effects of Mars gravity. Anyone know of any plans for such a mission?
Quote from: AlexCam on 09/01/2011 01:52 pmQuote from: Jim on 09/01/2011 01:31 pmzero g effectsNot required if a long-term artificial gravity experiment proves to be successful. There isn't any and hence the inclusion on the list.