Glossary/FLYING NEEDLE
From scientopedia
flying needle
Definitions
l . an F/N that is a real F/N and so forth, takes off, it flies. You can see it disconnect from the bank and start to function. So it's just a colloquialism; fly a needle, float a needle, F/N, that's all. (Class VIII No. 2) 2. an earlier definition-a constant rise, constant rapid rise.(SH Spec 181, 6208C07)
