Related Clues:

• It goes round and around as well as up and down
• Either way it's essential to a helicopter
• Something going round either way
• Lifts a chopper up and down
• Such as turns, going to and fro
• It can go round either way
• Revolutionary palindrome
• Part of a turbine
• Rubbish or Turner?
• Chopper blade going to and fro
• Soldiers following break down engine section
• This goes up and down, round and round
• Source of spin -- rubbish, alternatively
• One may raise chopper
• It's essential to a helicopter going up or down