In reply to wintertree:
Were they not to stabilise Fireball Junior during atmospheric entry and back to orbit?
For anyone who hasn't experienced the full joy of those days here is a full colour episode:
If you get bored with the story skip to the end for the wonderful 1960s pop rendering of "I wish I was a Spaceman" for the closing titles.
The opening sequence where they launch at a steep angle from the ground and see the sky darken and stars appear as they leave the atmosphere is a deep and enduring childhood memory.
It caused a recurring fantastic dream of being in a mercury capsule and seeing the earth from space with a real sense of grief for space after becoming earthbound again during the dream.
The same effect was used pretty well in the Zero X takeoff for Mars in Thunderbirds are Go, which had to be seen on the big screen to appreciate.
I think Apollo 13 borrowed the idea during the launch to Orbit sequence.
apologies for make nostalgia trip
Post edited at 10:25