I'll throw some facts out about that engine from my shool book. the power turbine section turs at 30,650 rpm's at 100% and the compressor turns about 51,000 rpm's at 100%. the ouput pad on the gearbox turns at 6,000 rpm's. it produces about 650 shaft hp and weighs 235 lbs dry. the max stabilized turbine operating temprature is 768º C. it's also got quite a few cut-away's and breakdowns of the engine. A variation of it is still used in the OH-58 helicopters in the army.