# Lesson 10 Flight Computer (Computer Side)

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E6B Fast Facts:

The stationary scale is the main scale (distance) while the inner scale that rotates is denoting time.

Division

240 / 10 = 24

1. Set dividend on outer wheel
2. Opposite divisor on inner wheel
3. Read quotient under black 10 mark

Multiplication

9 x 7 = 63

1. Set 7 across from black 10
2. Find 9 on inner wheel
3. Read 63 on outer wheel

Keep in mind most problems are division/multiplication

Time, Ground Speed, Distance Problems

On all Time, Ground Speed, Distance problems the large triangular index is either set opposite Ground Speed or will position itself opposite Ground Speed.

Distance and time are always opposite each other.

Time, Ground Speed, Distance problems

Distance 50 mi.

Ground speed 90 kts.

Time, Ground Speed, Distance Problems

Distance 450 mi.

Ground speed 140 kts.

Read Time 3 hrs. 12 min.

Fuel consumption problems

Fuel rate is read under the triangular index (usually gal/hr).

The outer scale is equivalent to the fuel used

The inner scale is flying time

Fuel consumption problems

Fuel Burn Rate 7.8 gal/hr

Time 2 hrs.

Fuel used 15.6 gal

Fuel consumption problems

Fuel Burn Rate 7.8 gal/hr

Fuel in Tanks 57.2 gal.

Total Time 7 hrs. 20 min.

Fuel consumption problems

Fuel Burn Rate 12 gal/hr

Fuel in Tanks 74 gal

Total Time 6 hrs. 10 min.

Conversion index

1. Set US gallons 19

Convert Nautical to Statute

1. Set NM to 52

Rate of climb

Aircraft ROC 800 ft/min

Climbing from 2000 to 14,000

How much time will it take

1. put 800 across from the black 10
2. find 12,000 on outer wheel
3. read 15 min on inner wheel

Rate of Descent

Aircraft cruise alt 9,000

15 min to descend to 1,000

1. set 15 on inner wheel across from 8,000
2. read 534 feet per min on outer wheel

TAS

PA 4500

Temp. C˚ 10

IAS 90 kts.

TAS 97 kts.

TAS

PA 10,000

Temp. C˚ -10

IAS 90 kts

TAS 104 kts

True Altitude

PA 10,000

Temp. C˚ -40

True Alt. 8689

Density Altitude

PA 1185

Temp. C˚ 10

DA 869

Density Altitude

PA 1185

Temp. C˚ 30

DA 3169