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APR E6-B9WL Pilot Flight Computer

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List Price: $39.95
Marv's Price: $31.95
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APR E6-B9WL Pilot Flight Computer
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Product Description

The Aero Product Research APR E6-B9WL Pilot Flight Computer is a universal wind triangle & T/S/D navigation computer that has a new, exclusive Windspeed Cursor Arm which quickly shows groundspeed, wind correction angle, and heading. This revolutionary design eliminates three set-ups and the need to mark a dot on the plastic disc.

The new APR Windspeed Cursor Arm makes solving wind problems a breeze. Simply set your true course, rotate cursor arm to wind direction, and read the wind correction angle and groundspeed. Instructions for Windspeed Cursor set-up are printed at the top of the low speed wind slide.

The E6-B9WL Time/Speed/Distance computer solves all major navigation computations and calculates necessary flight planning and en route navigation requirements. 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 slide-rule mathematics are quickly determined. The unit has write-in TC to CH boxes. The low speed wind slide shows speeds of 40 to 270 kts/mi.

Instructions and user-friendly scales printed on the T/S/D computer make learning faster and easier and allow for more accurate reading.

The flight planning wind triangle information slide shows formulae for true course to compass headings as well as illustrated examples of east/west magnetic variation. Also displayed are definitions relevant to wind triangle problems and diagrams of true heading and true course solutions. The headwind and crosswind component grid depicts the relative wind angle in a two-tone graphic for accurate and easy interpretation. Nautical and Statute rulers for Sectional and WAC charts are printed on the sides of the slide.

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.

The computer is made with anodized aluminum and comes with an embossed custom case.



  • Complete 52-page Instruction Manual includes BONUS Booklet Section on Dead Reckoning and Wind Effect Theory Calculations
  • Windspeed Cursor Arm
  • Miles and Gallons Scale (Distance)
  • Off-course & Drift Corrections
  • Minutes & Hours Scale (Time)
  • Mach Number Index Window
  • Slide-Rule Mathematics
  • Wind Component Grid
  • Altitude Correction
  • Fuel Consumption
  • Density Altitude Factors
  • Conversions:
  • Minutes to Seconds
  • True Airspeed
  • True Altitude
  • Temperature
  • Kilometers
  • Statute to Nautical to Statute Miles


  • Dimensions: 4.78" x 9.58"
  • Made with anodized aluminum

Other Information

Model # E6B9WL
Manufacturer Aero Products Research

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