MC-130 Handling

Question 1

Define bending moment

Answer 1

The movement created by a transverse deflection of a body through and perpendicular to its longitudinal axis
Example: walking across a plank

Question 2

Define Shearing Force

Answer 2

A force tending to cause deformation of a material by slippage along a plane or planes parallel to the imposed stress
Example: Slippage during an earthquake

Question 3

Define Torsion Moment

Answer 3

The twisting of a body by the exertion of forces tending to turn one end about a longitudinal axis, while the other is held fast or turned in the opposite direction
Example: Wringing a towel

Question 4

Load-limit factors

Answer 4

Exceeding the Ultimate Limit (UL) may cause catastrophic failure of the airframe.
- UL factors are, by definition, 1.5 times the Limit-Load factors (LLF)

Question 5

Prohibited Maneuvers

Answer 5

Maneuvers that result in excessive accelerations
-spins, nose high stalls, steep dives
Hard rudder kicks producing large yaw angles
Do not exceed:
-60 degree AoB with flaps retracted
-45 degree AoB with flaps extended
–Maximum 3.0 g symmetrical/2.33 g unsymmetrical with flaps up
–Maximum 2.0 g symmetrical/1.5 g unsymmetrical with flaps extended

Question 6

Abnormally High slideslip angles and the Fin-Stall

Answer 6

Abnormal… Prohibited by flight manual

• if pilots let sideslip go too far, could get fin stall
• normal maneuvering of aircraft, including reasonable sideslips and uncoordinated turns do not cause fin stall

Very violent and very uncomfortable maneuvers are required to produce a fin stall

• Reduce rudder force and/or use opposite rudder force to bring the aircraft back to coordinated flight
• DO NOT apply full opposite rudder, this could result in structural damage to the aircraft and/or departure from controlled flight
• Smoothly re-center the ball

Question 7

Define Symmetrical Maneuvers

Answer 7

Symmetrical maneuvers are those maneuvers performed with ailerons neutral - i.e. zoom maneuver from wings level flight
- limited to 3.0 g in area A

Question 8

Define Unsymmetrical Maneuvers

Answer 8

Unsymmetrical maneuver are those maneuvers performed with ailerons deflected - i.e. increasing back pressure on the yoke while threat reacting
- limited to 2.33 g in area A

Question 9

Explain stall characteristics

Answer 9

• Progresses: Light to moderate to heavy buffet
• Buffet intensity increases with increasing GW - With 0% flap light buffet precedes stall by 5 - 9 kts, gradually increasing to moderate stall
  
  • Higher intensity buffet and more abrupt with flaps extended
• Greatest stall warning margin exists (in terms of percentage of stall speed) at 50% flap configuration - Less margin exists at 0% and 100% flap

Question 10

Describe how to recover from a stall

Answer 10

EXCEEDING CRITICAL AoA CAUSED THE STALL

• Adjust back stick pressure to reduce AoA
  
  • Control rolling tendencies with ailerons and rudder (last surface to stall)
  • Rolling out also reduces AoA of your lifting surfaces, potentially breaking an accelerated stall
  • Add power if available
• DO NOT raise flaps (if extended) during recovery, this changes effective AoA
• “Don’t flaps cause drag and shouldn’t drag be reduced?”
• Remember that for a given AoA, flaps increase CL
• Raising flaps will immediately reduce lift and cause a sink

Question 11

Know the following on the C-130 Doghouse Plot (slide 78)

Answer 11

Max instantaneous turn
Max sustained turn
Max sustainable airspeed
 - Straight & Level
Corner Speed
 - Max sustainable turn
Minimum Airspeed