Quote from: RocketmanUS on 12/09/2012 03:23 amOutpost, with crew able to stay longer and multiple EVA with rover could be able to collect more samples, sort out what should be sent back to Earth. Ascender could take samples up to a return capsule in LLO, no crew in ascender would mean more mass of samples. Plus we would get better data on how crew is able to handle low gravity. More for total dollar invested. Better to what till 2022 just two years later to get a better return on the investment and a foot hold with the outpost. The geinus of Stern is that he is not going to be lulled into the same mistakes that NASA has been making over the past 5 decades. He is not about to allow his project to die a slow lingering death from requirements creep, and he is not going to try to get funded on the basis of unreasonable low-ball cost estimates.I have a hunch that he can do it for less than $8B, before 2020. And once it is clear that the major hurdles have been cleared, I would be very surprised if Godeln Spike does not announce some future extended stay lunar surface exploration options.I think his efforts are entirely worthwhile. We don't know if it will be successful. It is a gamble, just like Planetary Resources. If they do not get enough orders to warrant serious development then they can bail out without loosing their shirts. And if they succeed, then they just might have found a way to bypass the political barriers that have been holding back manned spaceflight.
Outpost, with crew able to stay longer and multiple EVA with rover could be able to collect more samples, sort out what should be sent back to Earth. Ascender could take samples up to a return capsule in LLO, no crew in ascender would mean more mass of samples. Plus we would get better data on how crew is able to handle low gravity. More for total dollar invested. Better to what till 2022 just two years later to get a better return on the investment and a foot hold with the outpost.
I agree... This whole plan depends on an effective lander, all other parts are nearly available. Make a great lander (ideally with a way to efficiently refuel it), and this plan is workable.
Quote from: Robotbeat on 12/10/2012 04:31 amI agree... This whole plan depends on an effective lander, all other parts are nearly available. Make a great lander (ideally with a way to efficiently refuel it), and this plan is workable.Actually, Rocketman is spot on. Identifying what paying customers want is the critical link.
The lander is what they would need to work on first. They will need to test land it before crew would use it. So land probes/rovers first. After the probes then land the needed components for an outpost ( could be added to later to make it a base ). Then send first crew to assemble the outpost and bring back some of the samples that the probes have collected.Investors would be paying for the outpost components and landing them on the moon. GSC should be looking to make a lander that is capable of placing 10klb to 15klb of usable mass on the surface without a crasher stage. Single stage to the surface. If it carried crew then it could return then to LLO without refueling. Us CH4/LOX. If fueled in LEO then it would not need the FH ( less tanker flights if can be done with FH ), also the EDS.No if we had an assemble station in LEO then all parts could be there and fueled. After the lander is on it's way the crew could be sent shortly after to LLO. Weather problems are eliminated as crew would be sent up before the tanks were filled by the assembly station. Assembly stations could be used for other types of missions too. Could store multiple EDS, landers, ect. at the station. Station could be designed to grow in size as needed. So it can start out small. They have stated in space propellent transfer, so that part would be developed that can work at an assemble station or tanker to EDS. So the first cargo missions could be done without the assemble station ( Atlas 55X or FH would be needed ).So what we need now is to now what the customers want. Flag and foot print to say they went and some samples? Or that and the ability to have a permanent base on the moon to explore and put the needed infrastructure there so they can move further out into the solar system?Get a lander that has a future on the lunar surface and they would most likely increase that amount of investors and funds.
Quote from: Bill White on 12/10/2012 04:40 amQuote from: Robotbeat on 12/10/2012 04:31 amI agree... This whole plan depends on an effective lander, all other parts are nearly available. Make a great lander (ideally with a way to efficiently refuel it), and this plan is workable.Actually, Rocketman is spot on. Identifying what paying customers want is the critical link. Paying customers want apps, cellphones, TVs, laptops, tablets, cars, food, and a trip to the beach. Let's not kid ourselves, we aren't trying primarily just to make money on whatever business. They are trying to land people on the Moon primarily, making enough money to pay for it comfortably. You cannot land on the Moon without a lander!
Quote from: Robotbeat on 12/10/2012 04:31 amI agree... This whole plan depends on an effective lander, all other parts are nearly available. Make a great lander (ideally with a way to efficiently refuel it), and this plan is workable.This whole plan depends on money. You have money, you have a lander. This is not the 1950's. Ask any of the current lander/VTVL developers what they need to make an effective* lander and I'm pretty sure their top answer will be money.Even if an off-the-shelf lander existed, the plan would go nowhere without money. Of course, if an off-the-shelf lander did exist, then we'd be living in a world where the creation of Golden Spike probably wouldn't have been necessary.* why use the word "effective"? If it lands, isn't it effective?
Quote from: Garrett on 12/10/2012 09:33 am* why use the word "effective"? If it lands, isn't it effective? That depends on whether you want to take off and come home again after you've landed.
* why use the word "effective"? If it lands, isn't it effective?
The heaviest lander they discuss is the 2-person, pressurized, storable lander that has a IMLLO of about 12 mT--about twice the IMLLO of the LH2 version. They note that the former is too heavy to fly under all mission scenarios (implying that it can fly under some, presumably using the FH LV's).
Us CH4/LOX.
If fueled in LEO then it would not need the FH ( less tanker flights if can be done with FH ), also the EDS.
Quote from: kch on 12/10/2012 03:42 pmQuote from: Garrett on 12/10/2012 09:33 am* why use the word "effective"? If it lands, isn't it effective? That depends on whether you want to take off and come home again after you've landed. I think what you're getting at is a fully reusable lander, that combines descent and ascent capabilities in to one module. Reusability is not necessarily more effective however.
Quote from: Bill White on 12/10/2012 04:40 amQuote from: Robotbeat on 12/10/2012 04:31 amI agree... This whole plan depends on an effective lander, all other parts are nearly available. Make a great lander (ideally with a way to efficiently refuel it), and this plan is workable.Actually, Rocketman is spot on. Identifying what paying customers want is the critical link. Yep.The rest of the technobabble here is not related to the future of Golden Spike.No bucks, no Buck Rogers.
Quote from: Warren Platts on 12/10/2012 12:57 pmThe heaviest lander they discuss is the 2-person, pressurized, storable lander that has a IMLLO of about 12 mT--about twice the IMLLO of the LH2 version. They note that the former is too heavy to fly under all mission scenarios (implying that it can fly under some, presumably using the FH LV's).Only if you don't use propellant transfer. If you do, ... the dry storable lander would be much lighter than the fueled cryogenic lander.
And since we do have propellant transfer and storage for hypergolics, but not for cryogens
Huh? I must be missing something because it seems to me that you still have ship the storable propellant to LLO, in a tanker presumably. Right? So you increase IMLEO and cost by including a depot/tanker--not to mention the residual propellant that will be leftover--in addition to your old-fashioned, over-weight, 2-stage, disposable, hypergolic lander!
That is simply not true. There are guys with nothing but a GED and CDL that do it every day. The problem with the LH2/LO2 lander concept is not that it is too hard to refuel--after all, they say that's why they want it--so that it can be refueled!