PPC

Question 1

The same PPC data will suffice for consecutive takeoffs and landings, when?

Answer 1

The aircraft gross weight or environmental conditions have not changed significantly; that is, an increase of 1,000 pounds GW, +/-10°C, or +/- 1,000 feet PA

Question 2

What is a validation factor?

Answer 2

The validation factor is a torque value that will correspond to the maximum allowable gross weight for the mission profile.

Question 3

What is the maximum power authorized for premission planning at departure/arrivals below 40KCAS?

Answer 3

Intermediate torque available (30 min operations).

Question 4

What is the purpose of performance planning?

Answer 4

To provide the best performance for the CH-47.

Question 5

Where are the conditions for the data listed?

Answer 5

Under the title for each chart.

Question 6

On the torque available chart, the point where the line bends to the left represents what?

Answer 6

The region where power is at maximum available due to NG speed limitation.

Question 7

What does the Vne line on the Cruise Chart represent?

Answer 7

Structural limitations as imposed by the

airspeed limitations chart (figure 5-8) in chapter 5.

Question 8

What do the torque available charts provide?

Answer 8

The primary use is to determine available engine torque for various combinations of PA and Temp.

Question 9

Maximum gross weight to hover chart is used to provide what?

Answer 9

The upper chart provides Max Structural limit, lower chart provides MAX GW IGE/OGE based on engine.

Question 10

What does the GO/NO GO provide?

Answer 10

If there is sufficient power to attempt OGE maneuvers.

Question 11

The Airspeed operating limits chart is used to determine an airspeed limit based on what?

Answer 11

To determine the max operating airspeed; structural or blade compressibility, use whichever is lower.

Question 12

What does the Max R/C and END airspeed provide?

Answer 12

The highest R/C, max time aloft and also

represents the best single engine airspeed.

Question 13

What does the MAX range airspeed provide?

Answer 13

The greatest distance out of a fuel load.

Question 14

What does MIN and MAX single engine airspeed provide?

Answer 14

The MIN and MAX airspeed range that

maybe flown with and without a load.

Question 15

What should be considered when selecting cruise airspeeds?

Answer 15

Airspeed selected is not in excess of

item 44/45, or the Vne line indicated on the cruise charts.

Question 16

What is drag factor value used for?

Answer 16

The amount of additional torque required to carry an external load.

Question 17

Max gross weight continuous power is based on what?

Answer 17

Airspeed, pressure altitude and temperature.

Question 18

What can you adjust on the cruise chart to meet the mission requirements?

Answer 18

The airspeed/gross weight on the applicable cruise chart.

Question 19

What does the MAX gross weight SE from the SESC chart tell you?

Answer 19

The MAX weight that SE flight can be maintained based on MAX R/C and Endurance KCAS and 100FPM climb.

Question 20

The maximum allowable GWT for the mission profile is based on?

Answer 20

Either structural limit or power limit for the entire mission.

Question 21

What can be added back into the MAX MSN profile GWT?

Answer 21

The expendables that will be used prior to

reaching the highest altitude/temperature if applicable.

Question 22

What chart and condition is used to calculate the MAX gross weight for MSN profile Torque?

Answer 22

The hover chart and forecast conditions at time of departure.