AC-130 / MC-130 Performance and Handling Flashcards Preview

18A - Aerodynamics and Performance > AC-130 / MC-130 Performance and Handling > Flashcards

Flashcards in AC-130 / MC-130 Performance and Handling Deck (55):
1

Absolute Altitude

Distance about the surface (AGL)

2

True Altitude

Distance above MSL

3

Indicated Altitude

Altitude reading on altimeter calibrated to proper sea level reference

4

Pressure Altitude

Altitude reading on altimeter set at standard atmosphere sea level barometric conditions (i.e. 29.92 inches of Hg)

5

Density Altitude

Pressure altitude corrected for nonstandard temperature

Best measurement of the air mass an aircraft operating in; primary indicator of performance.

6

For a given altimeter setting, as temperature increases, true altitude _________

increases

7

For a given altimeter setting, as temperature decreases, true altitude _________

decreases

8

For a given temperature, as altimeter setting increases, true altitude _________

decreases

9

For a given temperature, as altimeter setting decreases, true altitude _________

increases

10

Where do you find cold weather altimeter corrections?

In the FIH

11

When are cold weather corrections not required?

When using an aircraft's TRUE ALT function

12

When should you take altitude calibrations?

Altitude calibrations for any "True Alt" function need to be taken as close as possible to the objective area.

13

Understand implications of low alt threat reactions. Zero G Bunt

Airspeed does not affect time-to-impact, at 0g you lose 32 ft/sec^2

Faster you fly, the more g you command for a given change in pitch - this could produce visual illusions

14

Understand implications of low alt threat reactions. Negative g Pushover

Abrupt pushover to negative g condition should be avoided

*Angle of pitch down and negative g condition continues even after yoke direction has been reversed

15

**MFLMETO**

Length of runway required to accelerate to decision (refusal) speed, experience an engine failure and stop or continue acceleration to:
-(Legacy) 1.2Vs Power-on / (J) 1.05 Vmu4 in remaining runway
- **Does not guarantee Vmca**

16

**Refusal Speed Vr**

Max SPEED the aircraft can accelerate to on 4 engines and then STOP within the runway available.

-**When Computed refusal speed exceeds T/O speed, us T/O as refusal speed**

-**When computed refusal is less than takeoff, you must do an acceleration time check**

17

Critical Engine Failure Speed

Max SPEED (Vcef) the aircraft can accelerate to on 4 engines, lose 1 engine, and either STOP OR CONTINUE THE TAKEOFF within the charted critical field length.

18

**Ground Min Control Speed**

Minimum (Vmcg) speed during the ground run at which you can lose an engine and still maintain directional control.

-**Max power on remaining engines, (J) ATCS operating**

-**Maintain within 30 ft of runway centerline**

19

**Air Minimum Control Speed **

Min Speed (Vmca) to maintain directional control - Function of temp and pressure altitude

-Level flight is a function of power available and GW and whether you can maintain an AoA that supports the weight

-**For C-130, yaw control required (rudder authority) establishes Vmca**

20

**Air Minimum Control Speed (continued)**

As airspeed decreases:

-yaw from asymmetric thrust and (L) wind-milling prop drag increases

-Rolling tendency caused by asymmetric prop slipstream increases-balanced by aerodynamic controls, which become less effective

21

C-130 has greatest stall warning margin (in terms of percentage of stall speed) at what flap configuration?

50% Flaps

22

Is landing or takeoff performance more critical?

More important to know if you can depart the airfield

23

Best rate of climb is?

Maximum altitude GAIN OVER TIME; based on:

-Max continuous power/TIT
-Clean configuration

24

**Best angle of climb? **

Max altitude GAIN OVER DISTANCE

-**If obstacles are a factor immediately after T/O, maintain 50% flap obstacle clearance until clear**

25

**Service Ceiling is...**

**The alt at which the max rate-of-climb capability at maximum continuous power, and best climb speed is 100 ft per minute**

26

Discuss load limits and define forces experienced by the airframe. Structural and Load Limits

Structural limits are intended to prevent operation beyond the aircraft load limit.

Load limits assume aircraft weight and fuel distributions fall within established limits and smooth, steady force is applied to flight controls

27

Discuss load limits and define forces experienced by the airframe. Flight-control inputs

Abrupt control inputs produce abrupt control surface and primary structure loads of a greater magnitude than those produced by smooth, slowly applied control forces

*Consequently additional abrupt corrective inputs are required to stop the moving mass at the desired airplane attitude as in the snap roll*

28

Discuss load limits and define forces experienced by the airframe. Torsion Moment**

Twisting of a body by the exertion of forces tending to turn one end about its axis while the other end is held fast or turned in the opposite direction

29

Discuss load limits and define forces experienced by the airframe. Bending Moment

Created by transverse deflection of a body through and perpendicular to its longitudinal axis

30

Discuss load limits and define forces experienced by the airframe. Shearing Moment

Force tending to cause deformation of a material by slippage along a plane or planes parallel to the imposed stress

31

Discuss prohibited maneuvers. Do not exceed:

60 degrees w/flaps retracted
45 degrees w/flaps extended
- max 2.0 g symmetrical / 1.5 g unsymmetrical with flaps extended

32

Legacy aircraft g meter is only accurate at the _____

Installation

33

Symmetrical maneuvers are those maneuvers performed with ailerons _____

Neutral

34

**Ground Min Control Speed**

Minimum (Vmcg) speed during the ground run at which you can lose an engine and still maintain directional control.

-**Max power on remaining engines, (J) ATCS operating**

-**Maintain within 30 ft of runway centerline**

35

**Air Minimum Control Speed **

Min Speed (Vmca) to maintain directional control - Function of temp and pressure altitude

-Level flight is a function of power available and GW and whether you can maintain an AoA that supports the weight

-**For C-130, yaw control required (rudder authority) establishes Vmca**

36

Air Minimum Control Speed (continued)

As airspeed decreases:

-yaw from asymmetric thrust and (L) wind-milling prop drag increases

-Rolling tendency caused by asymmetric prop slipstream increases-balanced by aerodynamic controls, which become less effective

37

Two Engine Inop (Vmca2)

What does -1 require?

Bleed on reduces speed 2-5 kts

38

What type of flaps does the C-130 have?

Fowler Flaps

39

Deflection of the flaps causes:

- Increase in chord and wing area
- Nose down moments due to increased camber
- Twisting loads on structure
- Most be controlled with elevator
- For the same AoA, CL (coefficient of lift) will increase with flaps extended

40

How do you recover from a fin stall?

- Reduce rudder force and/or use opposite rudder force to bring the aircraft back to coordinated flight
- Smoothly recenter the ball

41

In general, thrust is the term used for jet aircraft and ______ is the term used for propeller-driven aircraft.

Power

Power is considered to be thrust x velocity and is expressed as shaft horsepower

42

What are the two main types of drag for slow speed aircraft?

- Parasite Drag
- Induced Drag

43

Parasite drag is a function of _________.

Velocity squared

44

Induced drag is a function of __________.

Angle of Attack (AoA)

45

Landing performance is...

More important to know if you can depart the airfield

46

Best rate of climb...

Maximum altitude GAIN OVER TIME; based on:

-Max continuous power/TIT
-Clean configuration

47

Does a heavier aircraft descend in less distance?

No, lighter aircraft descend in less distance.

48

Be able to read an energy maneuverability diagram

See slides 55/56.

49

**Best angle of climb? **

Max altitude GAIN OVER DISTANCE

-**If obstacles are a factor immediately after T/O, maintain 50% flap obstacle clearance until clear**

50

**Service Ceiling is...**

**The alt at which the max rate-of-climb capability at maximum continuous power, and best climb speed is 100 ft per minute**

51

Driftdown

Forced descent due to loss of engine(s)
-Maintain driftdown speed until descent drops to 100fpm
-maintain 100fpm down to appropriate 3-/2-engin service cieling

52

Max Range descent...

Flight idle, clean L/D max

53

penetration descent...

Max range to 20k Ft -250 knots to level

54

rapid-configured descent...

Flight idle, gear / 100 flaps - 145 knots to level

55

rapid-dive speed descent...

Flight idle, clean - dive speed to level