CL increases with an increase in AOA at some point the CL peaks and then begins to drop off This peak is called The wing root reaches its critical AOA making the stall progress ID: 287857
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Slide1
Utilizing your notes and past knowledge answer the following questions
:
CL increases with an increase in AOA, at some point the CL peaks and then begins to drop
off. This peak is called ____________.The wing root reaches its critical AOA _____ making the stall progress _________ toward the wingtip.By having the wing root stall first, _________ effectiveness is maintained at the wingtips, maintaining __________ of the aircraft.Describe two methods used to achieve the stalling of the wing root first.Critical AOA varies from _________depending on the aircraft’s design.
Warm-Up –
11/12
– 10 minutesSlide2
Questions / CommentsSlide3
Utilizing your notes and past knowledge answer the following questions
:
CL increases with an increase in AOA, at some point the CL peaks and then begins to drop
off. This peak is called ____________.The wing root reaches its critical AOA _____ making the stall progress _________ toward the wingtip.By having the wing root stall first, _________ effectiveness is maintained at the wingtips, maintaining __________ of the aircraft.Describe two methods used to achieve the stalling of the wing root first.Critical AOA varies from _________depending on the aircraft’s
design
.
Warm-Up –
11/12
– 10 minutesSlide4
Aerodynamic Forces in Flight ManeuversStallsCL increases with an increase in AOA, at some point the CL peaks and then begins to drop
off.This peak is called the CL-MAX. Slide5
Utilizing your notes and past knowledge answer the following questions
:
CL increases with an increase in AOA, at some point the CL peaks and then begins to drop
off. This peak is called ____________.The wing root reaches its critical AOA _____ making the stall progress _________ toward the wingtip.By having the wing root stall first, _________ effectiveness is maintained at the wingtips, maintaining __________ of the aircraft.Describe two methods used to achieve the stalling of the wing root first.Critical AOA varies from _________depending on the aircraft’s
design
.
Warm-Up –
11/12
– 10 minutesSlide6
Aerodynamic Forces in Flight ManeuversStallsIn most straight-wing aircraft, the wing is designed to stall the wing root first.
The wing root reaches its critical AOA first making the stall progress outward toward the wingtip.Slide7
Utilizing your notes and past knowledge answer the following questions
:
CL increases with an increase in AOA, at some point the CL peaks and then begins to drop
off. This peak is called ____________.The wing root reaches its critical AOA _____ making the stall progress _________ toward the wingtip.By having the wing root stall first, _________ effectiveness is maintained at the wingtips, maintaining __________ of the aircraft.Describe two methods used to achieve the stalling of the wing root first.Critical AOA varies from _________depending on the aircraft’s
design
.
Warm-Up –
11/12
– 10 minutesSlide8
Aerodynamic Forces in Flight ManeuversStallsBy having the wing root stall first, aileron effectiveness is maintained at the wingtips,
maintaining controllability of the aircraft. Various design methods are used to achieve the stalling of the wing root first.Slide9
Utilizing your notes and past knowledge answer the following questions
:
CL increases with an increase in AOA, at some point the CL peaks and then begins to drop
off. This peak is called ____________.The wing root reaches its critical AOA _____ making the stall progress _________ toward the wingtip.By having the wing root stall first, _________ effectiveness is maintained at the wingtips, maintaining __________ of the aircraft.Describe two methods used to achieve the stalling of the wing root first.Critical AOA varies from _________depending
on the aircraft’s
design
.
Warm-Up –
11/12
– 10 minutesSlide10
Aerodynamic Forces in Flight ManeuversStallsIn one design, the wing is “twisted” to a higher AOA at the wing root.
Installing stall strips on the first 20–25 percent of the wing’s leading edge is another method to introduce a stall prematurely.Slide11
Utilizing your notes and past knowledge answer the following questions
:
CL increases with an increase in AOA, at some point the CL peaks and then begins to drop
off. This peak is called ____________.The wing root reaches its critical AOA _____ making the stall progress _________ toward the wingtip.By having the wing root stall first, _________ effectiveness is maintained at the wingtips, maintaining __________ of the aircraft.Describe two methods used to achieve the stalling of the wing root first.Critical AOA varies from _________depending on the aircraft’s
design
.
Warm-Up –
11/12
– 10 minutesSlide12
Aerodynamic Forces in Flight ManeuversStallsThis critical AOA varies from 16° to 20° depending on the aircraft’s design.
But each aircraft has only one specific AOA where the stall occurs.Slide13
Questions / CommentsSlide14
November 14
1910 — The birth of the aircraft carrier occurs when Eugene Ely takes off from the cruiser
USS Birmingham
in Virginia, on a Curtiss biplane. The warship has an 83-foot platform built over the foredeck for the take-off. THIS DAY IN AVIATIONSlide15
November 14
1949 — Boeing Airplane Company begins delivery to the United States Air Force of B-50D's equipped with droppable fuel tanks.
THIS DAY IN AVIATIONSlide16
November 14
1957 — Chance Vought “
Regulus
II” completes successful rocket-boosted flight test by United States Navy. THIS DAY IN AVIATIONSlide17
November 14
1966 — A Lockheed C-141 “
Starlifter
” became the first jet aircraft to land in Antarctica. THIS DAY IN AVIATIONSlide18
Questions / CommentsSlide19
SundayMonday
TuesdayWednesdayThursday
Friday
Saturday
3
4
5
Chapter 4
Forces of Flight - Turns
6
7
Chapter 4
Forces of Flight – Climbs
Decents
8
9
10
11
No
School
12
Chapter 4
Forces of Flight
Stalls
13
14
Chapter 4
Forces of Flight
Stalls
15
16
17
18
Chapter 4
Forces of Flight
Basic Propeller Principles
19
20
Chapter 4
Forces of Flight
Basic Propeller Principles
21
22
Chapter 4 Quiz
FltLine
Friday
Flight
Simulator
Progress Reports
23
24
25
No
School
26No School27No School28No School29No School30
November 2013Slide20
Questions / CommentsSlide21
Chapter 4 – Aerodynamics
of FlightFAA – Pilot’s Handbook of Aeronautical KnowledgeSlide22
Mission:
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 the aerodynamics of 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.
Today’s Mission RequirementsSlide23
Aerodynamic Forces in Flight ManeuversStallsThere are three flight situations in which the critical AOA can be exceeded: low speed, high speed, and turning
.Slide24
Aerodynamic Forces in Flight ManeuversStallsThe aircraft can be stalled in straight-and-level flight by flying too slowly
. Slide25
Aerodynamic Forces in Flight ManeuversStallsAs the airspeed decreases, the AOA must be increased to retain the lift required for maintaining altitude.
The lower the airspeed becomes, the more the AOA must be increased. Slide26
Aerodynamic Forces in Flight ManeuversStallsLow speed is not necessary to produce a stall.
The wing can be brought into an excessive AOA at any speed. In a dive, the aircraft’s AOA changes abruptly from quite low to very high. Slide27
Aerodynamic Forces in Flight ManeuversStallsSince the flightpath of
the aircraft in relation to the oncoming air determines the direction of the relative wind, the AOA is suddenly increased, and the aircraft would reach the stalling angle at a speed much greater than the normal stall speed.Slide28
Aerodynamic Forces in Flight ManeuversStallsThe stalling speed of an aircraft is also higher in a level turn than in straight-and-level flight. Slide29
Aerodynamic Forces in Flight ManeuversStallsIn a turn, additional lift is acquired by applying back pressure
to the elevator control. This increases the wing’s AOA, and results in increased lift. Slide30
Aerodynamic Forces in Flight ManeuversStallsIf during a turn the AOA becomes excessive, the aircraft stalls.Slide31
Aerodynamic Forces in Flight ManeuversStallsTo balance the aircraft aerodynamically, the CL is normally located aft of the CG
. This makes the aircraft inherently nose-heavy, downwash on the horizontal stabilizer counteracts this condition. Slide32
Aerodynamic Forces in Flight ManeuversStallsAt the point of stall, this
allows the aircraft to pitch down abruptly, rotating about its CG. During this nose-down attitude, the AOA decreases and the airspeed again increases. Slide33
Aerodynamic Forces in Flight ManeuversStallsThe smooth flow of air over the wing
begins again, lift returns, and the aircraft is again flying. Caution - Considerable altitude may be lost before this cycle is complete.Slide34
Aerodynamic Forces in Flight ManeuversStallsAirfoil shape and degradation of that shape must also be considered in a discussion of stalls
. If ice, snow, and frost are allowed to accumulate on the surface of an aircraft, the smooth airflow over the wing is disrupted. Slide35
Aerodynamic Forces in Flight ManeuversStallsThis causes the boundary layer to separate at an AOA lower than that of the critical angle
. Lift is greatly reduced, altering expected aircraft performance. Slide36
Aerodynamic Forces in Flight ManeuversStallsIf ice is allowed to accumulate on the aircraft during flight
the weight of the aircraft is increased while the ability to generate lift is decreased. Slide37
Aerodynamic Forces in Flight ManeuversStallsIcing can occur in clouds any time the temperature drops below freezing and super-cooled droplets build up on an aircraft and freeze. Slide38
Questions / CommentsSlide39
Lesson Closure - 3 – 2 - 1
3. List 3 things you learned today.
1. Create (1) quiz question with answer about today’s lesson.
2. List 2 things you have questions about today’s lesson.