Engine Limitations

Question 1

Max Reverse

Answer 1

Prop RPM = 1825
Oil Press = 85-105
Max ITT = 805
SHP = 675
Torque = 1865
Ng% = 101.6%
Oil Temp = 0-99

Question 2

Max Idle

Answer 2

Oil Press= Min 40
ITT = 685
Ng% = Min 52%
Oil Temp = -40-99

Question 3

Transient

Answer 3

Prop RPM = 2090
ITT = 850 for 2 sec
Torque = 2400 for 20 sec
Ng% = 102.6% for 2 sec
Oil Temp = 0-104 for 10 minutes

Question 4

Take Off

Answer 4

Prop RPM = 1900
Oil Press = 85-105
ITT = 805
SHP = 675
Torque = 1865 / 1970 with 1800 Prop RPM (SOP: 1800 if runway dist is 1.5x required t/o roll)
Ng% = 101.6%
Oil Temp = 10-99

Question 5

Max Cruise

Answer 5

Prop RPM = 1900 (SOP: 1750 or 1600 VIP)
Oil Press = 85-105
ITT = 740 (SOP: 700)
SHP = 675
Torque = 1865 / 1970 with 1800 Prop RPM
Ng% = 101.6%
Oil Temp = 0-99

Question 6

Start

Answer 6

ITT = 1090 (SOP: 900, if ITT is continue rising towards 900 CANCEL START)
Oil Temp = -40

Question 7

Max Continues Rated

Answer 7

Prop RPM = 1900
Oil Press = 85-105
ITT = 805
SHP = 675
Torque = 1865 / 1970 with 1800 Prop RPM
Ng% = 101.6%
Oil Temp = 10-99

Question 8

Max Climb

Answer 8

Prop RPM = 1900
Oil Press = 85-105
ITT = 765 (SOP: 740)
SHP = 675
Torque = 1865 / 1970 with 1800 Prop RPM
Ng% = 101.6%
Oil Temp = 0-99

Question 9

Time Limitiations

Answer 9

Reverse = 1 minute (SOP: 30 sec)
ITT Above 765 = 5 minutes
Max transient torque = 20 sec
Max transient ITT and Ng% = 2 sec
Max ITT = 2 sec

Question 10

Ng%

Answer 10

100% = 37,500 RPM
101.6% = 38,100 RPM
Power Turbine 33,000 RPM

Question 11

Engine Start Cycle

Answer 11

1) BATT START
30 sec ON - 60 sec OFF
30 sec ON - 60 sec OFF
30 sec ON - 30 min OFF

2)EXTERNAL START
20 sec ON - 120 sec OFF
20 sec ON - 120 sec OFF
20 sec ON - 60 min OFF