(h)
Endurancetests; overspeed run. One hour of continuous operation must be conduc-ted at maximum continuoustorque andthe maximumpower-on overspeed expected in service, assuming that speed and torque limiting devices, if any, function pro-perly.
(i)
Endurance tests; rotor control positions. When the rotor controls are not being cy-cled during the tie-down tests, the rotor must be operated, using the procedures prescribedinparagraph(c)of this section, toproduce each of the maximum thrust positions for the following percentages of test time (except that the control po-sitions need not produce loads or blade .apping motion exceeding the maximum loads or motions encountered in .ight) :
(1)
Forfull vertical thrust,20percent.
(2)
For the forward thrust component, 50 percent.
(3)
For the right thrust component, 10 percent.
(4)
Fortheleftthrust component,10percent.
(5)
For the aft thrust component, 10 percent.
(j)
Endurance tests, clutch and brake engagements. A total of at least 400 clutch and brake engagements, including the engagements of paragraph (b) of this section, must be made during the takeo. torque runs and, if necessary, at each change of torque and speed throughout the test. In each clutch engagement, the shaft on the driven side of the clutch must be accelerated from rest. The clutch engage-ments must be accomplished at the speed and by the method prescribed by the applicant. During deceleration after each clutch engagement, the engines must be stopped rapidly enough to allow the engines to be automatically disengaged from the rotors and rotor drives. If a rotor brake is installed for stopping the rotor, the clutch, during brake engagements, must be disengaged above 40 percent of maxi-mum continuous rotor speed and the rotors allowed to decelerate to 40 percent of maximum continuous rotor speed, at which time the rotor brake must be applied. If the clutch design does not allow stopping the rotors with the engine running, or if no clutch is provided, the engine must be stopped before each application of the rotor brake, and then immediately be started after the rotors stop.
(k)
Endurance tests, OEI power run.
(1)
30-minute OEI power run. For rotorcraft for which the use of 30-minute OEI poweris requested, a run at30-minuteOEItorque andthe maximum speedfor use with30-minuteOEItorque mustbe conducted asfollows:For each engine, in sequence, that engine must be inoperative and the remaining engines must be run for a 30-minute period.
(2)
Continuous OEI power run. For rotorcraft for which the use of continuous OEI power is requested, a run at continuous OEI torque and the maximum
′
Elodie Roux. Septembre 2003
Subpart E : Powerplant
speed for use with continuous OEI torque must be conducted as follows : For each engine, in sequence, that engine must be inoperative and the remaining engines must be run for 1 hour.
(3) The number ofperiodsprescribedinparagraph(k)(1) or(k)(2) of this section may not be less than the number of engines, nor may it be less than two.
(l)
[Reserved.]
(m)
Any components that are a.ected by maneuvering and gust loads must be investi-gated for the same .ight conditions as are the main rotors, and their service lives must be determined by fatigue tests or by other acceptable methods. In addition, a level of safety equal to that of the main rotors must be provided for–
(1)
Each component in the rotor drive system whose failure would cause an un-controlled landing;
(2)
Each component essential to the phasing of rotors on multirotor rotorcraft, or that furnishes a drivinglink for the essential control of rotorsin autorotation; and
(3)
Each component common to two or more engines on multiengine rotorcraft.
(n)
Special tests.Each rotordrive system designed to operate at two or moregear ratios must be subjected to special testing for durations necessary to substantiate the safety of the rotor drive system.
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：FAA規章 美國聯邦航空規章 Federal Aviation Regulations 5(62)
