On the fourth day of the flight of Apollo 9, Schweickart felt better than expected as he worked his way into the lander to get it ready for the EVA. By the time he had put on the backpack, McDivitt was ready to let him do more – to stand on the lunar lander porch at least.
McDivitt later said that the engine had come on abruptly, but with the tremendous mass, acceleration was very slow – it took the whole 5 seconds to add 11 meters per second to the speed.
The successful Apollo 7 flight cleared the way for a US moon landing in 1969. Still a lot of flight and ground testing remained and there would probably be surprises. The greatest concern was Nasa had to complete three virtually flawless missions and achieve every major test objective before a lunar landing could be attempted. The odds seemed to be stack against NASA.
Perhaps the most significant point about the lunar-orbit flight proposed for Apollo 8 was that the command and service modules would fly the same route to the moon as would be used for the actual lunar landing.
An ‘A’ type mission would be flown with a Saturn V and be used to test the Launch vehicle, spacecraft, and a high velocity lunar return. Nasa cover the ‘A’ mission with Apollo 4 & 6.
A ‘B’ type mission would be flow with a Saturn IB and test the lunar module development, and propulsion, and launch vehicle staging. This was accomplished with Apollo 5.
A ‘C’ type mission would be flown with a Saturn IB and test the command and service module and evaluate the crew performance in low earth orbit. This was accomplished with Apollo 7…
CAPCOM Number 1 (Deke Slayton): Okay. I think you ought to clearly understand there is absolutely no experience at all with landing without the helmet on.
SCHIRRA: And there no experience with the helmet either on that one.
CAPCOM: That one we’ve got a lot of experience with, yes.
SCHIRRA: If we had an open visor, I might go along with that.
CAPCOM: Okay. I guess you better be prepared to discuss in some detail when we land why we haven’t got them on. I think you’re too late now to do much about it.
SCHIRRA: That’s affirmative. I don’t think anybody down there has worn the helmets as much as we have.
SCHIRRA: We tried them on this morning.
CAPCOM: Understand that. The only thing we’re concerned about is the landing. We couldn’t care less about the reentry. But it’s your neck, and I hope you don’t break it.
SCHIRRA: Thanks, babe.
CAPCOM: Over and out
After the uncertain days of February 1967, NASA officials began to realize that a recovery from the tragedy was under way. Through hard work and problem solving, morale of Nasa personnel started to improve…
What went wrong? Even years after the investigators began to sift through the wreckage of Apollo 1 piece by piece, no one could say exactly. But within weeks the general picture became clear: The fire was a disaster waiting to happen.