Sep 2012 Lesson 7.2 Power Pilot Flight Computer

Reference From the Ground Up Chapter 7.5: Navigation Problems Pages

Introduction The E6-B flight computer is used for many flight-related calculations and conversions.The E6-B flight computer is used for many flight-related calculations and conversions. The flight computer will be used extensively during pilot training, and is very useful for flight planning and in- flight calculations.The flight computer will be used extensively during pilot training, and is very useful for flight planning and in- flight calculations.

Outline Time, Distance, & SpeedTime, Distance, & Speed Unit ConversionsUnit Conversions Groundspeed & HeadingGroundspeed & Heading

E6-B Flight Computer The E6-B flight computer is used for many flight- related calculations and conversionsThe E6-B flight computer is used for many flight- related calculations and conversions

Time, Distance, Speed Set marker to speed (example: 80 knots/mph/etc)Set marker to speed (example: 80 knots/mph/etc) Read distance on outer scaleRead distance on outer scale Read time on inner scaleRead time on inner scale

Time, Distance, Speed Set at 80 knots:Set at 80 knots: –Dist of 40 NM = –Time of 30 min

Time, Distance, Speed Set at 80 knots:Set at 80 knots: –Dist of 160 NM = –Time of 120 min –Time of 2 hrs (hour scale useful over 60 minutes)

Unit Conversions Nautical miles to/from statute miles:Nautical miles to/from statute miles: –Line up NAUT arrow with STATUTE arrow –Read knots/NM on outside –Read MPH/SM on inside Example:Example: –61 NM = –70 SM

Unit Conversions Statute miles to/from kilometers:Statute miles to/from kilometers: –Line up STAT arrow with KM arrow –Read MPH/SM on outside –Read km/h/km inside Example:Example: –56 SM = –90 km

Groundspeed & Heading When determining your required heading (corrected for wind) and resulting groundspeed for a cross- country flight, use the following procedure on the back of the flight computer:When determining your required heading (corrected for wind) and resulting groundspeed for a cross- country flight, use the following procedure on the back of the flight computer: –Rotate circle so the wind direction is under “True Index” –Use a pencil to make small dot straight up from centre hole, using vertical scale to measure airspeed (in knots) –Rotate circle so the true track is under “True Index” –Slide back-plate so that pencil dot is on horizontal line that matches true air speed (TAS) –Read wind correction angle on vertical line under the pencil dot (left of centre = -, right of centre = +) –Read groundspeed under centre hole

Groundspeed & Heading Example Problem: Track= 040º true Variation= 12º east Deviation= 4º west TAS= 115 knots Wind= 160º true at 25 knots What is the resultant ground speed and compass heading to maintain track?Example Problem: Track= 040º true Variation= 12º east Deviation= 4º west TAS= 115 knots Wind= 160º true at 25 knots What is the resultant ground speed and compass heading to maintain track?

Groundspeed & Heading 1.Wind Direction: –Set 160º under true index 2.Wind Speed: –Mark dot 25 knots up from centre 25

Groundspeed & Heading 3.True Track: –Set 40º under true index 4.True Air Speed: –Slide wind mark to 115 knots line 115

Groundspeed & Heading 5.Wind Correction: –Read wind correction angle of +11º 6.Ground Speed: –Read resulting ground speed of 126 knots 11

Groundspeed & Heading 7.True Heading: –Add wind correction (+11º) to track (40º) –= 51º true heading 8.Compass Heading –Convert true heading to compass heading using variation (12º E) and deviation (4º W): TVMDC –51º + (-12º) + 4º = 43º Final Answer:Final Answer: –Groundspeed = 126 knots –Compass Heading = 043º