Marine Starters

Article lead image — Size 45T SSS Clutch for DDG51 Gas Turbine Generator Starter

The Size 45T SSS Clutch is used as a replacement for the previous unreliable sprag clutch on the Air Starter for a Gas Turbine Generator set. The clutch output bolts directly to the gearbox high speed pinion shaft, and the air starter is mounted to the input side of the clutch by the existing Marmon Clamp.

A manual turning feature was added at the time of the retrofit so that GT inspection could be carried out without disturbing any rotating parts.

Fig A: Size 45T SSS Clutch installed onboard DDG-61, USS Ramage. Fig B: Locked access plate removed and turning tool being inserted into clutch. Fig C: Tool rotating gas turbine for boroscopic inspection.