Download - Warm-Up – 5/7 – 10 minutes
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Utilizing your notes and past knowledge answer the following questions:
1) Describe the effect of a tailwind and headwind on an aircraft during takeoff.
2) What is the concern of an aircraft taking off below the recommended speed?
3) What is the concern regarding gross weight and landing?
4) Describe the benefits and concerns with excessive speed at landing.
5) Describe the most critical conditions of landing performance.
Warm-Up – 5/7 – 10 minutes
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Questions / Comments
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Utilizing your notes and past knowledge answer the following questions:
1) Describe the effect of a tailwind and headwind on an aircraft during takeoff.
2) What is the concern of an aircraft taking off below the recommended speed?
3) What is the concern regarding gross weight and landing?
4) Describe the benefits and concerns with excessive speed at landing.
5) Describe the most critical conditions of landing performance?
Warm-Up – 5/7 – 10 minutes
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Takeoff Performance• The effect of wind on
takeoff distance is large.
• The effect of a headwind is to allow the aircraft to reach the lift-off speed at a lower groundspeed while the effect of a tailwind is to require the aircraft to achieve a greater groundspeed to attain the lift-off speed.
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Utilizing your notes and past knowledge answer the following questions:
1) Describe the effect of a tailwind and headwind on an aircraft during takeoff?
2) What is the concern of an aircraft taking off below the recommended speed?
3) What is the concern regarding gross weight and landing?
4) Describe the benefits and concerns with excessive speed at landing.
5) Describe the most critical conditions of landing performance?
Warm-Up – 5/7 – 10 minutes
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Takeoff Performance
• Any attempt to take off below the recommended speed means that the aircraft could stall, be difficult to control, or have a very low initial rate of climb.
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Utilizing your notes and past knowledge answer the following questions:
1) Describe the effect of a tailwind and headwind on an aircraft during takeoff?
2) What is the concern of an aircraft taking off below the recommended speed?
3) What is the concern regarding gross weight and landing?
4) Describe the benefits and concerns with excessive speed at landing.
5) Describe the most critical conditions of landing performance?
Warm-Up – 5/7 – 10 minutes
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Landing Performance• The effect of gross weight on landing
distance is one of the principal items determining the landing distance.
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Utilizing your notes and past knowledge answer the following questions:
1) Describe the effect of a tailwind and headwind on an aircraft during takeoff?
2) What is the concern of an aircraft taking off below the recommended speed?
3) What is the concern regarding gross weight and landing?
4) Describe the benefits and concerns with excessive speed at landing.
5) Describe the most critical conditions of landing performance?
Warm-Up – 5/7 – 10 minutes
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Landing Performance• An excessive speed at landing may
improve the controllability slightly (especially in crosswinds), but causes an undesirable increase in landing distance.
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Utilizing your notes and past knowledge answer the following questions:
1) Describe the effect of a tailwind and headwind on an aircraft during takeoff?
2) What is the concern of an aircraft taking off below the recommended speed?
3) What is the concern regarding gross weight and landing?
4) Describe the benefits and concerns with excessive speed at landing.
5) Describe the most critical conditions of landing performance.
Warm-Up – 5/7 – 10 minutes
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Landing Performance• The most critical conditions of landing
performance are combinations of high gross weight, high density altitude, and unfavorable wind.
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Questions / Comments
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May 7
• 1936 — Amy Mollison lands at Wingfield Aerodrome, Cape Town, South Africa, to set a new record of 3 days, 6 hours, 26 minutes for a flight from England.
THIS DAY IN AVIATION
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May 7
• 1937 — The first successful pressurized airplane cabin is achieved in the Lockheed XC-35.
THIS DAY IN AVIATION
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May 7
• 1958 — Lockheed F-104A “Starfighter” sets altitude record for aircraft of 91,243 feet.
THIS DAY IN AVIATION
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May 7
• 1979 — Air France is the first airline to operate the Lockheed L-1011-500, a long-range version of the “TriStar” with shorter fuselage, more powerful engines, and improved aerodynamics.
THIS DAY IN AVIATION
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Questions / Comments
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SUNDAY MONDAY TUESDAY WEDNESDAY THURSDAY FRIDAY SATURDAY
1
Chapter 10
Aircraft Performance
2 3
4 5
Chapter 10
Aircraft Performance
6 7
Chapter 10
Aircraft Performance
8 9
Patriot’s Point
Field Trip
10
11 12 13
Chapter 11
14 15
Chapter 12/13
16 17
18 19
Chapter 14/15
20 21
Chapter 16/17
22
Seniors Last Day
23
Flightline Friday
24
25 26
Memorial Day
NO SCHOOL
27 28 29 30 31
May 2014
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Questions / Comments
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Chapter 10 – Aircraft PerformanceFAA – Pilot’s Handbook of Aeronautical Knowledge
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Mission: Describe the factors that affect aircraft performance.
Identify how aircraft weight, atmospheric conditions, runway environment, and the fundamental physical laws governing the forces can affect aircraft performance.
EQ: Describe the importance of Aeronautical Knowledge for the
student pilot learning to fly.
Today’s Mission Requirements
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Performance Charts
• Performance charts allow a pilot to predict the takeoff, climb, cruise, and landing performance of an aircraft.
• These charts, provided by the manufacturer, are included in the AFM/POH.
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Interpolating Data
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Takeoff Charts
• Sample Problem • Pressure Altitude........2,000
feet• OAT...............................22
°C• Takeoff Weight............2,600
lbs• Headwind....................6
knots• Obstacle Height.........50 ft
obstacle
This chart is an example of a combined takeoff distance graph. It takes into consideration pressure altitude, temperature, weight, wind, and obstacles all on one chart.
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Takeoff Charts
First, find the correct temperature on the bottom left-hand side of the graph.Follow the line from 22° C straight up until it intersects the 2,000 foot altitude line. From that point, draw a line straight across to the first dark reference line.
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Takeoff Charts
Continue to draw the line from the reference point in a diagonal direction following the surrounding lines until it intersects the corresponding weight line.From the intersection of 2,600 pounds, draw a line straight across until it reaches the second reference line.
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Takeoff Charts
Once again, follow the lines in a diagonal manner until it reaches the six knot headwind mark. Follow straight across to the third reference line and from here, draw a line in two directions. First, draw a line straight across to figure the ground roll distance.
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Takeoff Charts
Next, follow the diagonal lines again until it reaches the corresponding obstacle height. In this case, it is a 50 foot obstacle. Therefore, draw the diagonal line to the far edge of the chart. This results in a 600 foot ground roll distance and a total distance of 1,200 feet over a 50 foot obstacle.
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Takeoff Charts
The lift-off speed at 2,600 pounds would be 63 knots and over the 50 foot obstacle would be 68 knots.
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Takeoff Charts
• Sample Problem • Pressure Altitude........3,000
feet• OAT...............................30
°C• Takeoff Weight............2400
lbs• Headwind....................18
knots• Obstacle Height.........50 ft
obstacle
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Takeoff Charts
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Takeoff Charts
With an 18 knot headwind, it is necessary to decrease the distance by 20 percent. Multiply 1,325 feet by 20 percent (1,325 x .20 = 265), subtract the product from the total distance (1,325 – 265 = 1,060). Repeat this process for the total distance over a 50 foot obstacle.
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Takeoff Charts
The ground roll distance is 1,060 feet and the total distance over a 50 foot obstacle is 1,984 feet.
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Cruise and Range Performance Charts
• Sample Problem • Pressure Altitude........5,000 feet• RPM...............................2400 rpm• Fuel Carrying Capacity ......38 gallons, no
reserve
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Cruise and Range Performance Charts
• Find 5,000 feet pressure altitude in the first column on the left-hand side of the table.
• Next, find the correct
rpm of 2,400 in the second column.
• Follow that line straight across and read the TAS of 116 mph, and a fuel burn rate of 6.9 gallons per hour.
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Cruise and Range Performance Charts
• As per the example, the aircraft is equipped with a fuel carrying capacity of 38 gallons.
• Under this column, read that the endurance in hours is 5.5 hours and the range in miles is 635 miles.
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Takeoff Performance• Cruise power setting tables are useful
when planning cross-country flights. • The table gives the correct cruise power
settings, as well as the fuel flow and airspeed performance numbers at that altitude and airspeed.
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Crosswind and Headwind Component
• The maximum demonstrated crosswind component is published in the AFM/POH.
• The crosswind and headwind component chart allows for figuring the headwind and crosswind component for any given wind direction and velocity.
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Crosswind and Headwind Component Chart
• Sample Problem • Runway........17• Wind..............140 at 25 knots
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Cruise and Range Performance Charts
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Crosswind and Headwind Component
• First, determine how many degrees difference there is between the runway and the wind direction.
• It is known that runway 17 means a direction of 170°; from that subtract the wind direction of 140°.
• This gives a 30° angular difference, or wind angle.
• Next, locate the 30° mark and draw a line from there until it intersects the correct wind velocity of 25 knots.
• From there, draw a line straight down and a line straight across.
• The headwind component is 22 knots and the crosswind component is 13 knots.
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Crosswind and Headwind Component
• This information is important when taking off and landing so that, first of all, the appropriate runway can be picked if more than one exists at a particular airport, but also so that the aircraft is not pushed beyond its tested limits.
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Landing Charts• It is necessary to compensate for
differences in density altitude, weight of the airplane, and headwinds.
• Remember, when calculating landing distance that the landing weight will not be the same as the takeoff weight.
• The weight must be recalculated to compensate for the fuel that was used during the flight.
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Landing Chart
• Sample Problem • Pressure Altitude........1,250 feet• Temperature..............Standard
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Landing Chart
• The pressure altitude of 1,250 is halfway between sea level and 2,500 feet.
• First, find the column for sea level and the column for 2,500 feet.
• Take the total distance of 1,075 for sea level and the total distance of 1,135 for 2,500 and add them together.
• Divide the total by two to obtain the distance for 1,250 feet.
• The distance is 1,105 feet total landing distance to clear a 50 foot obstacle.
• Repeat this process to obtain the ground roll distance for the pressure altitude.
• The ground roll should be 457.5 feet.
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Landing Charts• Using the given conditions, determine the
landing distance for the aircraft. • This graph is an example of a combined
landing distance graph and allows compensation for temperature, weight, headwinds, tailwinds, and varying obstacle height.
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Landing Chart
• Sample Problem • OAT………………………57 F• Pressure Altitude........4,000 feet• Landing Weight……….2,400 lbs• Headwind.....................6 knots• Obstacle Height……….50 Feet
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Landing Chart
• Begin by finding the correct OAT on the scale on the left side of the chart.
• Move up in a straight line to the correct pressure altitude of 4,000 feet.
• From this intersection, move straight across to the first dark reference line.
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Landing Chart
• Follow the lines in the same diagonal fashion until the correct landing weight is reached.
• At 2,400 pounds, continue in a straight line across to the second dark reference line.
• Once again, draw a line in a diagonal manner to the correct wind component and then straight across to the third dark reference line.
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Landing Chart
• From this point, draw a line in two separate directions: one straight across to figure the ground roll and one in a diagonal manner to the correct obstacle height.
• This should be 900 feet for the total ground roll and 1,300 feet for the total distance over a 50 foot obstacle.
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Landing Performance• As in the takeoff planning, certain speeds
must be considered during landing. • These speeds are shown below.
• VSO—stalling speed or the minimum steady flight speed in the landing configuration.
• VREF—1.3 times the stalling speed in the landing configuration.
• This is the required speed at the 50-foot height above the threshold end of the runway.
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Chapter Summary• Performance characteristics and
capabilities vary greatly among aircraft. • Moreover, aircraft weight, atmospheric
conditions, and external environmental factors can significantly affect aircraft performance.
• It is essential that a pilot become intimately familiar with the performance characteristics and capabilities of the aircraft being flown.
• The primary source of this information is the AFM/POH.
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Questions / Comments