CH47 -10 and .4 memorization

Question 1

Single Engine Service Ceiling Chart:
The charts are based on the aircraft being flown at ___ (___) to provide a maximum of ___ for a given pressure altitude and free air temperature.

Answer 1

– the best single engine airspeed (maximum endurance/maximum rate of climb airspeed)
– 100 feet per minute rate of climb.

Question 2

Alternating Current System:
The AC system is protected from ___, ___, and ___ conditions by generator control units. The generators will be disconnected from the AC buses any time the frequency drops below ___ for more than ___. These frequencies correspond to ___.

Answer 2

– overvoltage, undervoltage, and underfrequency
– 325 to 335 Hz, 3 to 7 seconds
– 82 to 85% NR.

Question 3

Fire emergencies:
When dealing with a FIRE emergency, aircrew should check for positive signs of fire and confirm with crewmembers in the cabin during the diagnoses process. If unsure, ___.

Answer 3

crews must assume there is a fire and execute the appropriate emergency action steps.

Question 4

Engine Failure Warnings:
The ENG 1/2 FAIL warning is activated whenever the engine failure logic within the ECU recognizes any of the following:_______________

Answer 4

– Power turbine shaft failure (NP is greater than NR by more than 3%).
– Engine flameout.
– NG underspeed (NG speed is below 48%).
– Over temperature start abort (Primary mode only).
– FADEC Primary and Reversionary failure.

Question 5

DAFCS-Off Flight Characteristics:
In general, the DAFCS-off flight characteristics are enhanced by ___, ___, and ___.

Answer 5

– spoilers on the forward pylon.
– strakes on the fuel pods and ramp.
– a blunted aft pylon.

Question 6

DAFCS-Off Flight Characteristics:
DAFCS-off flight will not be difficult when the following techniques are used:____________

Answer 6

– Maintain airspeed below established limits
– Enter all maneuvers smoothly, keep control movements coordinated and avoid overcontrol.
– Constantly scan the inclinometer to maintain trimmed flight.
– React positively but smoothly to divergent movements.

Question 7

CD REL Switch:
The CD REL switch is used to simultaneously ___ allowing the controls to be freely repositioned.

Answer 7

release the force-feel trim magnetic brakes for the lateral, longitudinal, and directional flight controls.

Question 8

Bucket Speed (.4):
Bucket speed is the airspeed range providing ___. Using the cruise chart for current conditions, ___, ___, ___, and ___. The most critical is ___.

Answer 8

– the best power margin for maneuvering flight.
– enter at 50% of maximum torque available
– go up to gross weight, over to the lowest and highest airspeed intersecting the aircraft gross weight
– note speeds between which there is the greatest power margin for maneuvering flight.

– lower speed since at higher speeds airspeed energy may be traded to maintain altitude while maneuvering.

Question 9

Best Rate-of-Climb / Maximum Endurance Airspeed (.4):
This airspeed has the following characteristics:____________

Answer 9

– Total drag at the minimum.
– Largest amount of excess power available.
– Lowest fuel flow during powered flight.
– Maximum single engine gross weight that can be carried (for dual engine aircraft).

Question 10

Airspeed Limitations Chart:
To determine the maximum operating airspeed, it is necessary to know the FAT, PA, and GW. Two airspeed limits must be determined and the lower limit is used. One is the ___; the other is ___

Answer 10

– structural limit based on GW.
– based on compressibility of airflow over the rotor blade.