UH-1H
A rise of 2 degrees C causes a loss of 1.5 PSI torque
A rise of each 1000 foot in altitude will cause a loss of 0.75 PSI torque
An increase of 1 PSI torque is equivelent to 200 LBS lift capability
For a given power setting, there is approx 1000 LBS difference in gross weight between IGE and OGE
Hovering OGE requires approx 5 PSI torque more than IGE