With more efficient engines (including the option of PT6As) and greater wing span, the updated Metroliner III version allows for greater takeoff weights. It's also more economical to operate, turning it into a perfect cargo- and regional airplane. Metro III can be easily configured for cargo, ambulance or 19-seat commuter operation. With up to 500km/h high cruise-speed and a pressurized cabin, it is the largest aircraft that can land on short unsealed airstrips.