Control inputs 68 to {HEAD ~ the counter rotational gears} 44 in {TAIL ~ the concentric counter rotation transmission unit} 28 distribute shaft horsepower generated by the engine core to the upstream blade row and downstream blade row through pitch control units 26 and 42 
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Control inputs 68 to { HEAD ~ the counter rotational gears } 44 in { TAIL ~ the concentric counter rotation transmission unit } 28 distribute shaft horsepower generated by the engine core to the upstream blade row and downstream blade row through pitch control units 26 and 42
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH