Roadster 280,
The Fairey Gannet had a Double Mamba turboprop driving the contra-rotating props. The gearbox arrangement allowed one engine to be shut down to save fuel and extend endurance without having an asymmetric effect. Engines would routinely be alternated on / off every 30 minutes to equalize usage. I always thought it was a nice little aircraft.
Fairey Gannet AEW3
