http://model-boats.com/plans The two main engines were Rover Meteorite petrol units which each developed 375 h.p. and ran at 2,400 r.p.m. The craft had Mathway hydraulically operated reverse gearboxes which meant that when reverse gear was selected the craft could stop in its own length. Both engines rotated anti-clockwise and were controlled from the wheel house.
The two engines were mounted on strong and durable sub frames. They were the dry sump type and included fresh water cooling; flaps were used on the outlets to prevent the ingress of water. The sub frame also carried a lubricating oil service tank, oil filters, oil thermostat and a combined oil and water cooler. The whole assembly was built so that it could be lifted in and out as a single unit.