*Mate worked for TWA and said they had a long pole with rubber end to stop fan rotation on JT9Ds during start-up with strong tailwind.
*"ONTOS" the TWA Fairchild C-82A Packet used to ferry JT9Ds around Europe.
I believe Britannias required a member of ground crew to hold a prop blade if there was a strong tail wind during start up.
I'd love to have seen TWA's Packet!