Unmanned Systems Technology 009 | Ocean Aero Submaran S10 | Simulation and testing | Farnborough report | 3W-110xi b2 TS HFE FI | USVs | Data storage | Eurosatory/UGS 2016 report

supplies hydraulic fluid at a working pressure of about 75 psig (pounds per square inch gauge) to the hydraulic motor via two connections, enabling the motor to reverse its direction of rotation. Ocean Aero chose electro-hydraulics over a purely electrical system for the combination’s greater versatility, fewer rotating shafts or sliding rod seals and the fact that it is less likely to suffer water leaks and is more tolerant of any that do occur. The motor has a low swept volume with a high-torque output via a square shaft. The motor bolts to the bottom of the clutch housing via an adapter plate, and turns the central flap driveshaft via a square socket in the centre of a circular boss on the bottom of the shaft that passes through the adapter plate. On top of this circular boss, and therefore fixed to the flap driveshaft, is a clutch ring. The flap driveshaft passes through the hollow centre of the wing sail AOI driveshaft, on the lower end of which is a set of elongated splines on which a clutch piston is free to slide vertically. This piston has teeth on both upper and lower surfaces. The upper end of the wing sail AOI driveshaft is formed into a worm drive, while the upper end of the concentric flap driveshaft engages with a separate The S10’s hull in the workshop, revealing the depth of the wing fold slot and composite construction, which uses primarily glass fibre reinforced plastic