Related Clues:

• Revolving arm
• It goes round
• Revolving arm in machine
• Turning blade
• Revolving mechanism
• Revolving part of machinery
• Distributor arm
• Reversible part of a helicopter?
• Drop remover
• Black Hawk part
• Machine part that spins
• Helicopter component
• Wrote her we heard to keep it ticking over
• Whirlybird feature
• Disc-brake component