HI guys,
Thank you for the information guys. I'm making notes. How about the best cruise altitudes to use? I gather you guys don't generally go above FL250? The engines are the straight 118s and the craft was converted from a RT to an ER. So i'm thinking going above 250 would be a stretch for us using the straight 118s.
I heard flaps can create maintenance issues. Any recommendations re. flap usage?
Regards
Kiz
How many more messages do i have to go before i can PM?
Originally Posted by
JetJock16
Once you can PM I'll add more but here's some numbers:
T6 Limits:
SkyWest climb limit ........................................... 720°C (Maximizes Eng life etc)
(Limit the higher of the T6's to 720 and then Match the other Tq)
MAX Cruise torque:
NP at 100% .................................................. .......... 72%
NP at 90% .................................................. ............ 80%
NP at 85% .................................................. ............ 84%
NP at 80% .................................................. ............ 84%
Min. NH for ops of deice equip .................................... 80%
Note: We cruise at 85% Np and have flip cards that take ALT and Temp into account to give us a cruise setting that’s 2/3’s performance and 1/3 economy.
NP Limits:
Max speed for setting NP to 100% ......................... 200 KIAS (Don’t use props as speed brakes!!!)
Min NP in icing conditions ............................................ 85%
Climb at 100% Tq and 720°C. At 12K reduce Np to 90% while observing the 720°C climb limitation. This reduces cabin noise. If needed the 720 limitation can be exceeded as need by the pilots.
Fuel conservation descent is roughly at 190 - 210 KIAS with a 2K FPM descent rate, Np at 80% and Tq around 30% or less.