As a side-bar to the above side bar ( I like that terminology today) on the 76A if you look up the Max Cat B take-off weight , where the take-off weight is less than 10,500 lbs due to the effects of altitude and temperature and plot that weight,temperature,and altitude against the 52knot , 21/2 minute OEI , forward climb performance chart, you will find invariably that the rate of climb is zero , "0" FPM .