Quote:
Originally Posted by MarKoBrow
To further expand on the concept:
Contra-rotating propellers, also referred to as coaxial contra-rotating propellers, apply the maximum power of usually a single piston or turboprop engine to drive two propellers in opposite rotation  |
Its a bit more definitive than this...
The term contra-rotating prop is only correct if both props are driven from a singl engine.
If each prop is driven by a separate engine (as in the Gannet) then the term used is counter-rotating props.
The Gannet prop is simply two independent props that are mounted one behind the other and its odd to see a Gannet fly (back in the day!) with one prop stopped.