Performance Class 2 x Cat A Sk92

[alexandrepvi]

Hello everybody,

I would like to discuss performance class 2 operations as compared to CAT A / PC1 operations on the S92.

If you are at MTOW (26.500lb), MSL, 1013, zero wind, 32°C, your TDP would be 47kt and you would be able to safe reject in 2.343ft (iFly precision) =)
And for the same conditions you will have to limit your take off mass as temperature goes above 32°C.

But if we use the chart for PC2:

MAXIMUM TAKEOFF AND LANDING GROSS WEIGHT
BASED ON 150 FPM OEI CLIMB AT 1000 FT ABOVE THE TAKEOFF SURFACE
CT7−8A MAXIMUM CONTINUOUS OEI POWER BEST ROC SPEED

We have a limitation that starts from 34°C.

Does anyone knows the reason for this difference?

If we are taking off from a paved clear runway shouldn´t those two be the same?

Best regards,

Vidual

[helonorth]

Try pprune. This is mostly a US forum and not much cat A being done around here.