Mission objectives Apollo AS-201, maiden flight of the Saturn IB
Posted on Flickr by Mike Acs: link
The AS-201 mission, which included instrumented Apollo command and service modules and a spacecraft LEM adapter, to check spacecraft launch vehicle mechanical compatibility and to test the spacecraft heat shield in a high-velocity reentry mode.
The objectives of the mission were to:
Demonstrate the Saturn IB launch vehicle propulsion, guidance and electrical systems.
Demonstrate structural compatibility between the launch vehicle and CSM, ensuring the spacecraft's design loads weren't exceeded.
Demonstrate appropriate separation of all vehicle elements.
Demonstrate the CSM's heat shield, service propulsion system (including in-space restart), CM and SM reaction control systems, environmental control of cabin pressure and temperature, partial communications, stability and control, Earth landing system, and electrical power subsystem.
Evaluate the Emergency Detection System in an open-loop configuration.
Demonstrate the CM heat shield ablator at a 200 BTU/ft2/sec heat transfer rate.
Demonstrate support facilities for launch, mission control, and recovery
"A still from onboard camera footage of the S-IVB stage pulling away from the spent S-IB during the AS-201 flight."
"The first stage worked perfectly, lifting the rocket to 57 kilometers (31 nmi), when the S-IVB took over and lifted the spacecraft to 425 kilometers (229 nmi). The CSM separated and continued upwards to 488 kilometers (263 nmi).
The ground track for the suborbital AS-201 flight.
The CSM then fired its own rocket to accelerate the spacecraft towards Earth. The first burn lasted for 184 seconds. It then fired later for ten seconds. This proved that the engine could restart in space, a crucial part of any crewed flight to the Moon./It entered the atmosphere traveling 8,300 meters per second (27,000 ft/s). It splashed down 37 minutes after launch, 72 kilometers (39 nmi) from the planned touch down point, and was on board the aircraft carrier USS BOXER two hours later."
-Info from Drew Ex Machina: link