tag:blogger.com,1999:blog-6633940777526327846.post8644093715932566533..comments2024-03-21T08:00:48.696-07:00Comments on No Shortage of Dreams: Apollo to Mars & Venus: North American Aviation's 1965 Plan for Piloted Planetary Flybys in the 1970sUnknownnoreply@blogger.comBlogger16125tag:blogger.com,1999:blog-6633940777526327846.post-9194517649765718762020-10-15T18:23:11.073-07:002020-10-15T18:23:11.073-07:00I really feel like a newbie to space history now. ...I really feel like a newbie to space history now. I'll bookmark this and learn from you about the space. This is like a bible. DAVID BINIONhttps://solarpanelfreak.com/noreply@blogger.comtag:blogger.com,1999:blog-6633940777526327846.post-43755769172114060472020-10-06T13:11:12.974-07:002020-10-06T13:11:12.974-07:00Abort could take place during the first hour after...Abort could take place during the first hour after trans-Mars injection. After that, it'd be too late - the CSM could not return to Earth in a survivable period of time. To be honest, though, I don't think that NAA devoted a lot of attention to the abort. Bellcomm would delve into it more during 1966 studies. dsfpDavid S. F. Portreehttps://www.blogger.com/profile/15818906581595028816noreply@blogger.comtag:blogger.com,1999:blog-6633940777526327846.post-2175724190437139662020-10-06T11:48:04.642-07:002020-10-06T11:48:04.642-07:00Hi HB,
There would have been 44,000 lbs of propel...Hi HB,<br /><br />There would have been 44,000 lbs of propellant in the Service Module at the start of the mission. I imagine that if the docking failed a propulsive abort would be possible that early in the trajectory. You might even be able to stretch the fuel supply by using the Oberth effect during either an Earth or lunar flyby. <br /><br />But yeah, I'd hate to see that docking go wrong.Capt Stevehttps://www.blogger.com/profile/10262797376576426403noreply@blogger.comtag:blogger.com,1999:blog-6633940777526327846.post-91538660634396592772020-10-05T09:10:07.225-07:002020-10-05T09:10:07.225-07:00Captain:
I suspect that they'd have dumped t...Captain: <br /><br />I suspect that they'd have dumped the isotopic generator. There's discussion in other piloted flyby documents of flying a meteoroid-detector spacecraft akin to the Pegasus satellites out to the edge of the Asteroid Belt ahead of the piloted flyby mission. If they'd done that, and believed the data it returned, they'd not have worried so much about meteoroids. David S. F. Portreehttps://www.blogger.com/profile/15818906581595028816noreply@blogger.comtag:blogger.com,1999:blog-6633940777526327846.post-80318383297717975422020-10-05T09:04:16.822-07:002020-10-05T09:04:16.822-07:00AL:
In the next round of piloted flyby planning t...AL:<br /><br />In the next round of piloted flyby planning they abandoned artificial-G. Incidentally, the 75-foot spin radius was probably not sufficient to avoid some unhealthy effects — astronauts would have felt a difference in G between their feet and their heads, for example. <br /><br />dsfpDavid S. F. Portreehttps://www.blogger.com/profile/15818906581595028816noreply@blogger.comtag:blogger.com,1999:blog-6633940777526327846.post-29826330400397623752020-10-05T08:58:34.225-07:002020-10-05T08:58:34.225-07:00HB:
It's a bit like the Apollo mission, whic...HB: <br /><br />It's a bit like the Apollo mission, which sees the CSM retrieve the LM from the top of the S-SIVB in transit to the Moon. That being said, if the CSM could not dock with the LM then the crew could use CSM propulsion to get onto a free-return trajectory, swing around the Moon, and return to Earth. The piloted flyby crew could not survive in their CSM for more than a couple of David S. F. Portreehttps://www.blogger.com/profile/15818906581595028816noreply@blogger.comtag:blogger.com,1999:blog-6633940777526327846.post-19428948498538423572020-10-04T12:58:54.432-07:002020-10-04T12:58:54.432-07:00"CSM and MC/PC would then rendezvous and dock..."CSM and MC/PC would then rendezvous and dock "in transit" soon after their S-IVBs placed them on course for Mars."<br /><br />I would be very, very nervous about messing up that docking.Harry Bravinerhttps://www.blogger.com/profile/03194295400356729149noreply@blogger.comtag:blogger.com,1999:blog-6633940777526327846.post-56699452663496068012020-10-03T22:00:38.049-07:002020-10-03T22:00:38.049-07:00If they needed to add fuel in Earth orbit, they mi...If they needed to add fuel in Earth orbit, they might as well get a truss structure up there and have it bolted between the CSM and the rest. It might not be as lightweight but would have been much eafer and easier to build.Alexander Lópezhttps://www.blogger.com/profile/08517986861000324855noreply@blogger.comtag:blogger.com,1999:blog-6633940777526327846.post-39739538883195140412020-10-03T20:06:50.356-07:002020-10-03T20:06:50.356-07:00There would not be very much time for the astronau...There would not be very much time for the astronauts to be 'human tending' in a manner that would seriously improve over navigation from Earth.<br /><br />It's not NASA's that's so much worried about losing people, it's the public. Search up Apollo 1 and Apollo Applications on this blog to see how much of an impact Apollo 1 alone had on the space program.<br /><br />Solar fredinnohttps://www.blogger.com/profile/17753508368520026406noreply@blogger.comtag:blogger.com,1999:blog-6633940777526327846.post-79123353302825226902020-10-03T02:25:35.878-07:002020-10-03T02:25:35.878-07:00Instead of cold-gas, monopropellant, or bipropella...Instead of cold-gas, monopropellant, or bipropellant thrusters (or perhaps as a back-up to any of these), heliogyro solar sail blades (or E-sail [electric sail]) wires could be deployed from each spinning spacecraft component, enabling precise control of the spin rate during pay-out and reel-in of the cables. The heliogyro solar sail blades could utilize variable blade pitch (or Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6633940777526327846.post-24397652042632041232020-10-02T08:41:42.852-07:002020-10-02T08:41:42.852-07:00Speaking of artificial gravity solutions, I wonder...Speaking of artificial gravity solutions, I wonder if anyone has ever written a paper/article about the various proposed solutions and their effect on mission planning, i.e. mission 'X' would have been more feasible or taken more seriously had it not been for the penalty in launch mass imposed by the artificial gravity solution. I'd note that space station design and planning didn'Capt Stevehttps://www.blogger.com/profile/10262797376576426403noreply@blogger.comtag:blogger.com,1999:blog-6633940777526327846.post-51390897390302186962020-10-02T08:37:18.252-07:002020-10-02T08:37:18.252-07:00Using the CSM as a counterweight is an odd choice ...Using the CSM as a counterweight is an odd choice to be sure. A better (read: safer) option would be to use the SIIb as the counterweight, but the tradeoff would be extra mass and therefore more propellant needed for any engine burns and you'd still have the isotropic generator sitting in the CM, fairly close to the crew for 700 days. Capt Stevehttps://www.blogger.com/profile/10262797376576426403noreply@blogger.comtag:blogger.com,1999:blog-6633940777526327846.post-45287923507054614692020-10-01T09:23:38.815-07:002020-10-01T09:23:38.815-07:00I know, right? I didn't want to comment on the...I know, right? I didn't want to comment on the use of the CSM as a counterweight in the post - wanted to see if folks like yourself had some thoughts on it. Incidentally, as best I can tell, an artificial-gravity spin-up/spin-down test was not part of the development and test program. Imagine if a spin-down thruster jammed on during CSM retraction. Instant spaghetti! dsfpDavid S. F. Portreehttps://www.blogger.com/profile/15818906581595028816noreply@blogger.comtag:blogger.com,1999:blog-6633940777526327846.post-19012686215000529742020-10-01T08:44:43.406-07:002020-10-01T08:44:43.406-07:00If I were on that crew the thought of those cable ...If I were on that crew the thought of those cable reels failing would keep me up at night. The ride home is at the other end of those cables...<br /><br />The need to imm4ediately start cooling the isotropic power source after landing is problematic. What if the CM lands off-target? Granted the chances of that are very small, but not zero. Capt Stevehttps://www.blogger.com/profile/10262797376576426403noreply@blogger.comtag:blogger.com,1999:blog-6633940777526327846.post-10364604018546869642020-09-30T19:58:06.537-07:002020-09-30T19:58:06.537-07:00I don't think it would make sense to release p...I don't think it would make sense to release probes. It might make sense to think of the flyby spacecraft as a space station that goes somewhere — as you imply, I think! If one is trying to creep up on a Mars mission — say, if annual funding is not sufficient to carry out a Mars landing mission on a reasonable timeline — a free-return piloted flyby might be a good interim mission for keeping David S. F. Portreehttps://www.blogger.com/profile/15818906581595028816noreply@blogger.comtag:blogger.com,1999:blog-6633940777526327846.post-39893386331471184582020-09-29T22:45:35.388-07:002020-09-29T22:45:35.388-07:00Would a flyby mission still make sense today? Say ...Would a flyby mission still make sense today? Say using the SLS and a derivative of Gateway?fredinnohttps://www.blogger.com/profile/17753508368520026406noreply@blogger.com