932 was the solution decided on and, I believe still is used by, the US operators of the C130E and H for the T56-15, way back in the late '70s. Allison always intended the engine to be operated at 1010, but didn't make the turbine of stern enough stuff - and so history repeats itself. The RAF settled for a compromise of 985 - which may have had something to do with the fact that our engines were license-built by Rolls Royce originally, and may have been more durable. Seemed to work well enough at 985, anyway. Spookily, the HSC figures (height/IAS) for the C130K at 1010 were very similar to the HSC figures for the C130J at designed MCP........