Warm-Up – 12/13 – 10 minutes Utilizing your notes and past knowledge answer the following questions: Define the Rate of Turn. Define Radius of Turn. What.

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Presentation transcript:

Warm-Up – 12/13 – 10 minutes Utilizing your notes and past knowledge answer the following questions: Define the Rate of Turn. Define Radius of Turn. What are the principal reasons an aircraft is certificated for weight and balance? What are the concerns that a heavier gross weight can have on an aircraft? What can habitual overloading of an aircraft cause?

Questions / Comments

Warm-Up – 12/13 – 10 minutes Utilizing your notes and past knowledge answer the following questions: Define the Rate of Turn. Define Radius of Turn. What are the principal reasons an aircraft is certificated for weight and balance? What are the concerns that a heavier gross weight can have on an aircraft? What can habitual overloading of an aircraft cause?

Load Factors and Flight Maneuvers Rate of Turn The rate of turn (ROT) is the number of degrees (expressed in degrees per second) of heading change that an aircraft makes.

Warm-Up – 12/13 – 10 minutes Utilizing your notes and past knowledge answer the following questions: Define the Rate of Turn. Define Radius of Turn. What are the principal reasons an aircraft is certificated for weight and balance? What are the concerns that a heavier gross weight can have on an aircraft? What can habitual overloading of an aircraft cause?

Load Factors and Flight Maneuvers Radius of Turn If the bank angle is held constant and the airspeed is increased, the radius of the turn changes (increases). A higher airspeed causes the aircraft to travel through a longer arc due to a greater speed.

Warm-Up – 12/13 – 10 minutes Utilizing your notes and past knowledge answer the following questions: Define the Rate of Turn. Define Radius of Turn. What are the principal reasons an aircraft is certificated for weight and balance? What are the concerns that a heavier gross weight can have on an aircraft? What can habitual overloading of an aircraft cause?

Weight and Balance Aircraft are certificated for weight and balance for two principal reasons: 1. The effect of the weight on the aircraft’s primary structure and its performance characteristics. 2. The effect of the location of this weight on flight characteristics, particularly in stall and spin recovery and stability.

Warm-Up – 12/13 – 10 minutes Utilizing your notes and past knowledge answer the following questions: Define the Rate of Turn. Define Radius of Turn. What are the principal reasons an aircraft is certificated for weight and balance? What are the concerns that a heavier gross weight can have on an aircraft? What can habitual overloading of an aircraft cause?

Effect of Weight on Flight Performance A heavier gross weight results in a longer takeoff run and shallower climb, and a faster touchdown speed and longer landing roll.

Warm-Up – 12/13 – 10 minutes Utilizing your notes and past knowledge answer the following questions: Define the Rate of Turn. Define Radius of Turn. What are the principal reasons an aircraft is certificated for weight and balance? What are the concerns that a heavier gross weight can have on an aircraft? What can habitual overloading of an aircraft cause?

Effect of Weight on Aircraft Structure Habitual overloading tends to cause cumulative stress and damage that may not be detected during preflight inspections and result in structural failure later during completely normal operations.

Questions / Comments

THIS DAY IN AVIATION December 13 1949 — Prototype Of North American Aviation XF-93, Air Force jet penetration fighter, arrives at Edwards Air Force Base, California for testing. The XF-93 is a new version of the basic North American F-86 “Sabre” design, with a 38-foot wingspan and 44 foot length, powered by a Pratt & Whitney J-42 engine.

THIS DAY IN AVIATION December 13 1984 — First flight of the Grumman X-29 FSW (Forward Swept Wing) research aircraft.

THIS DAY IN AVIATION December 13 1962 — USAF Stargazer balloon reached an altitude of 82,000 feet

Questions / Comments

December 2013 1 2 3 Chapter 4 Torque 4 5 Load Factors 6 7 8 9 Sunday Monday Tuesday Wednesday Thursday Friday Saturday 1 2 3 Chapter 4 Torque 4 5 Load Factors 6 7   8 9 Load Factors / Stalling Speeds 10 11 Load Factors Turns / Weight Balance 12 13 Weight Balance Load Distribution Flightline Friday 14 15 16 17 TEST 18 19 20 21 22 23 NO SCHOOL 24 25 26 27 28 29 30 31

Questions / Comments

Chapter 4 – Aerodynamics of Flight FAA – Pilot’s Handbook of Aeronautical Knowledge

Today’s Mission Requirements Identify in writing the forces acting on an aircraft in flight. Describe how the forces of flight work and how to control them with the use of power and flight controls essential to flight. Describe in writing how design, weight, load factors, and gravity affect an aircraft during flight maneuvers. EQ: Describe the importance of Aeronautical Knowledge for the student pilot learning to fly.

Effect of Load Distribution The effect of the position of the CG on the load imposed on an aircraft’s wing in flight is significant to climb and cruising performance.

Effect of Load Distribution With forward loading, “nose-up” trim is required in most aircraft to maintain level cruising flight. Nose-up trim involves setting the tail surfaces to produce a greater down load on the aft portion of the fuselage, which adds to the wing loading and the total lift required from the wing if altitude is to be maintained.

Effect of Load Distribution This requires a higher AOA of the wing, which results in more drag and, in turn, produces a higher stalling speed.

Effect of Load Distribution With aft loading and “nose-down” trim, the tail surfaces exert less down load, relieving the wing of that much wing loading and lift required to maintain altitude. The required AOA of the wing is less, so the drag is less, allowing for a faster cruise speed.

Effect of Load Distribution The recovery from a stall in any aircraft becomes progressively more difficult as its CG moves aft. This is particularly important in spin recovery, as there is a point in rearward loading of any aircraft at which a “flat” spin develops.

Effect of Load Distribution A flat spin is one in which centrifugal force, acting through a CG located well to the rear, pulls the tail of the aircraft out away from the axis of the spin, making it impossible to get the nose down and recover.

Effect of Load Distribution To summarize the effects of load distribution: The CG position influences the lift and AOA of the wing, the amount and direction of force on the tail, and the degree of deflection of the stabilizer needed to supply the proper tail force for equilibrium.

Effect of Load Distribution The aircraft stalls at a higher speed with a forward CG location. This is because the stalling AOA is reached at a higher speed due to increased wing loading.

Effect of Load Distribution Higher elevator control forces normally exist with a forward CG location due to the increased stabilizer deflection required to balance the aircraft.

Effect of Load Distribution The aircraft cruises faster with an aft CG location because of reduced drag. The aircraft becomes less stable as the CG is moved rearward. A forward CG location increases the need for greater back elevator pressure.

Chapter Summary In order to sustain an aircraft in flight, a pilot must understand how thrust, drag, lift, and weight act on the aircraft. By understanding the aerodynamics of flight, how design, weight, load factors, and gravity affect an aircraft during flight maneuvers from stalls to high speed flight, the pilot learns how to control the balance between these forces.

Chapter Summary For information on stall speeds, load factors, and other important aircraft data, always consult the AFM/POH for specific information pertaining to the aircraft being flown.

Questions / Comments

Lesson Closure - 3 – 2 - 1 2. List 2 things you have questions about today’s lesson. 3. List 3 things you learned today. 1. Create (1) quiz question with answer about today’s lesson.