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APR E6-B4 Flight Computer

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List Price: $39.95
Marv's Price: $31.95
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APR E6-B4 Flight Computer
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Product Description

The Aero Products Research APR E6-B4 Flight Computer is a Pocket Sized version of the E6-B9HL Wind Triangle & T/S/D computer. It calculates all necessary flight planning and en route navigation requirements. Included on the unit are both low (40 to 270 kts or mi) and high (200 to 700 kts or mi) speed slides, a compressibility F factors scale, a Cross Wind Component Grid, and two wac/sec rulers.

The Time/Speed/Distance computer determines fuel consumption solutions, density altitude factors, conversions for true airspeed & altitude, mach number, kilometers, minutes to seconds, statute to nautical to statute miles, off-course and drift corrections and provides slide-rule mathematics.

The E6-B4 calculates all necessary flight planning and en route navigation requirements. Scales are user-friendly and allow for quick, accurate reading. Instructions printed on the computer make learning faster and easier.

Included is a 4-color 52-page illustrated Manual along with a Bonus Booklet “Dead Reckoning Wind Effects Theory Calculations and Vector Diagrams” valued at $9.95.


  • Complete 52-page Instruction Manual includes BONUS Booklet Section on Dead Reckoning and Wind Effect Theory Calculations
  • Miles and Gallons Scale (Distance) • Off-course & Drift Corrections
  • Minutes & Hours Scale (Time)
  • Mach Number Index Window
  • Slide-Rule Mathematics
  • Wind Component Grid
  • Microset Alignment
  • Beveled T/S/D Dial
  • Altitude Correction
  • Fuel Consumption
  • Density Altitude Factors


  • Minutes to Seconds
  • True Airspeed
  • True Altitude
  • Temperature
  • Kilometers
  • Statute to Nautical to Statute Miles


  • Dimensions: 3 1/4" x 6 3/8"
  • Made with anodized aluminum

Other Information

Model # E6-B4
Manufacturer Aero Products Research

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