Chapter 5 Limits Flashcards
(30 cards)
Maximum wind velocity for rotor start or stop
45 kts from any direction
Main rotor overspeed
One dot=127%
Two dot=137%
Three dot=142%
Engine RPM
12 Sec transient 105-107%
Transient. 101-105%
Continuous. 95-101%
Transient. 91-95%
Avoid operations in 20-40 and 60-90% range except during start and shutdown.
Power off (autorotation) rotor RPM
Maximum 110%
Transient 105-110%
Normal 90-105%
Fuel Quantity A/L
Normal 200-1500 lbs
Precautionary 0-200 lbs
Airspeed
Maximum 193 knots
Engine Ng
10 second transient 102-105%
30 minute limit 99-102%
Continuous 0-99%
Engine oil temperature
30 minute limit 135-150 degrees Celsius
Continuous -50-135 degrees Celsius
Engine oil pressure (700)
Continuous 20-100 psi
*35 psi minimum at 90% Nq and above
Engine % TRQ (700)
10 second transient Dual-engine 100-125% Single-engine 110-135% Continuous Dual-engine 0-100% Single-engine 0-110%
Turbine Gas Temperature (700)
10 second transient 850-886 degrees Celsius
Start abort limit 850 degrees C
30 minute limit 775-850 degrees C
Normal 538-775 degrees C
Main transmission oil temperature 60-A
Precautionary 105-120 degrees C
Continuous -50-105 degrees C
Main transmission oil pressure
Precautionary 65-130 psi
Continuous 30-65 psi
Idle and transient 20-30 psi
Engine % TRQ (701C)
10 second transient Dual engine above 80kts 100-144% 80kts or below 120-144% Single engine 135-144% Continuous Single engine 0-135% Dual engine Above 80kts 0-100% At or below 80kts 0-120%
Turbine gas temperature (701C)
10 second transient 903-949 degrees C 2.5 minutes transient (contingency power) 878-903 degrees C Start abort limit 851 degrees C 10 minute limit 851-878 30 minute limit 810-851 degrees C Normal 538-810 degrees C
Engine oil pressure (701C)
5 minute limit 100-120 psi
Normal operation 26-100 psi
Idle 22-26 psi
Main transmission oil temperature 60-L
Precautionary 105-140 degrees C
Continuous-50-105 degrees C
Engine starter limits
Temps 15 degrees C and below. Two start cycles (60 seconds between) 3minute rest period Two start cycles (60 seconds between) 30 minute rest
Temps above 15 to 52 degrees C
Two start cycles (60 seconds between)
30 minute rest
Engine start caution
Engine start attempts at or above a pressure altitude of 18,000 feet (701c), or 20,000 feet (700) could result in a Hot Start.
Weight limitation
60-A 20,250
60-L 22,000
60-L 23,500 only with cargo hook loads between 8000-9000 pounds
Floor loading maximum capacity is 300 pounds per square foot.
Max capacity for each storage compartment
125 pounds
Load capability of the four cabin ceiling tie down fittings
4,000 pounds
Cargo hook weight limits and airspeed
60-A 8,000 pounds
60-L 9,000 pounds
120 KIAS
Rescue hoist weight limit
600 pounds
