# Lesson 8 Aircraft Performance

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## Airspeed Calibration

Given: IAS 110kts Flaps 0

CAS 111kts

## Altimeter Correction

Given: 100kts Flaps 0

## Wind Components

cos of angle x velocity = Headwind

sin of angle x velocity = Crosswind

Given: Rwy 18 Wind 200/10

Crosswind = 3.5 kts

## Wind Components

Given Rwy 18 Wind 260/20

Subtract to get angle

260-180=80

Find speed (20) on arc

Drop down for crosswind

## Takeoff Distance

### Takeoff distance Problem #1

Given: Elevation 1400, Temp 52F, Wind Calm, Alt. Setting 29.32

1st figure Pressure Altitude

PA = 2000

Ground roll 1178

Over a 50′ obstacle 1861

### Takeoff Distance

Landing Distance Same method as Takeoff Distance

Interpolation Problem #2 Landing Distance

Interpolation Problem #3 Landing Distance

Interpolation Problem #4 Landing Distance

Given: Elevation 1185, Temp 9C, Alt. Setting 29.30, Wind 10 kts

Given:

Cruise Alt. 4500

65% Power

7.8 Gal/Hr

98knots True

### Time, Fuel and Distance to Climb

Given: Elevation 1185, Alt 29.60

Cruise Alt 5500

Find PA:

29.60-29.92=.32×1000=320

320+1185=1505 PA at takeoff

5500+320=5820 PA at cruise

Find 1505 go over drop down

2 min, .4 gal, 2 miles

Find 5820 go over drop down

11.5 min, 1.8 gal, 14 miles

Subtract corresponding numbers and get:

9.5 minutes

1.4 gallons

12 miles