E6b Flight Computer Exercises Verified

1. Wind Correction & Ground Speed

Exercise 1.1

  • True Course (TC): 120°
  • True Airspeed (TAS): 110 kt
  • Wind: 040° at 25 kt
  • Find: Wind Correction Angle (WCA), True Heading (TH), Ground Speed (GS)

Solution (E6B slide rule method):

  1. Set wind direction (040°) under true index.
  2. Mark wind velocity (25 kt) up from center.
  3. Rotate to TC (120°) under true index.
  4. Slide so TAS (110) under grommet.
  5. Read WCA: ~+12° (right correction).
  6. Read GS: ~101 kt.

Verified answers:

  • WCA = 12° right
  • TH = 132°
  • GS = 101 kt

Exercise 1.2

  • TC: 270°
  • TAS: 150 kt
  • Wind: 200° at 30 kt
  • Find: WCA, TH, GS

Solution steps:
Wind from 200° (blowing to 020°). On E6B: e6b flight computer exercises verified

  • WCA ≈ 10° left
  • GS ≈ 136 kt

Verified:

  • TH = 260°
  • GS = 136 kt
  • WCA = 10° L

2. Exercise Set 1: Time, Speed, Distance

Exercise 1: Time, Speed, and Distance

  • Given: Distance = 200 NM, Speed = 120 KT
  • Find: Time = ?
  • Solution: Set the outer scale (STATUTE) to 120 KT, then align the inner scale (TIME) to 200 NM. Read the time: 1 hour 40 minutes.

Part 4: Density Altitude & Performance

These Socratic exercises are common on CFI written exams.

1. Fuel & Time – “How Long Can I Fly?”

Problem:
You have 28 gallons usable. Burn rate = 9.5 GPH. How many hours/minutes endurance?

Solution (E6B):

  • Set 9.5 on outer scale over 60 (minutes) on inner scale.
  • Find 28 on outer scale → read inner scale: 176 minutes → 2 hr 56 min.

✅ Verified: 28 ÷ 9.5 = 2.947 hrs × 60 = 176.8 min.

4. Time, Speed, Distance

Exercise 4.1

  • Distance: 240 NM
  • GS: 160 kt
  • Find: Time en route (minutes)

E6B method (outer scale: distance, inner scale: time):
Place 160 (speed) over 60 (minutes). Read time opposite 240 NM.

Verified answer:
90 minutes (1 hr 30 min) True Course (TC): 120° True Airspeed (TAS): 110

Exercise 4.2

  • Time: 2 hr 15 min = 135 min
  • GS: 95 kt
  • Find: Distance

Place 95 over 60. Opposite 135 min → distance.

Verified:
214 NM

Exercise 4.3

  • Distance: 320 NM
  • Time: 2 hr 40 min = 160 min
  • Find: GS

Place 320 opposite 160 min. Read speed over 60.

Verified:
120 kt