411A
Ok now I think I've got it !!
Pratt and Whitney, desperate to get into the radial engine business built an engine for the B36 which was a pusher engine.
Then to get more business they got it put into the C124, The C119 and the P2V but no one told them these engines were pullers rather than pushers.
Pratt thought that all they had to do was change the prop the other way round and bingo.
They then found out the hard way that the front cylinders were now in the back and it all went downhill from there.
Fortunately by then the all the jet engine people emigrating from Europe went to work for them and they got into the jet engine business and the rest as they say is history !
