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Navigation 404-04

Navigation 404-04. Ground School. CI Pesto. Topics of Discussion Today. Time, Speed, and Distance Calculations Solving TVMDC Questions 1 in 60 Rule E6B Calculations of the circular side. Time, Speed, Distance. Speed, Time and Distance are related by the equation:. Speed = Distance

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Navigation 404-04

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  1. Navigation404-04 • Ground School CI Pesto

  2. Topics of Discussion Today • Time, Speed, and Distance Calculations • Solving TVMDC Questions • 1 in 60 Rule • E6B Calculations of the circular side

  3. Time, Speed, Distance • Speed, Time and Distance are related by the equation: Speed = Distance Time -Given any of the two variables, the other can be found using this equation

  4. Questions! Speed = Distance Time Speed = 65 KM 0.5 Hrs Speed = 130 KM/Hr *Note: Times need to be converted into hours

  5. More Questions! Time = Distance Speed Time = 200 Km 100 km/Hr Time = 2 Hrs

  6. Questions Cont. Distance = Speed × Time Distance = 50 Km/Hr × 3 Hrs Distance = 150 Km

  7. Speed Conversions • Knots to MPH Multiply by 1.15 • MPH to Knots Divide by 1.15 • KPH to Knots Multiply by 0.54 • KPH to MPH Multiply by 0.62

  8. Time Conversions • Hours to Minutes Multiply by 60 • Minutes to Hours Divide by 60

  9. Time Conversion Q’s

  10. Time in Flight • To find the time in flight, divide the distance by the ground speed. The time to fly 120NM at a ground speed of 80 knots is: 120 ÷ 80 = 1.5 hrs (1.5 hrs × 60 = 90 mins) 1 hr and 30 mins

  11. Distance • To find the distance flown in a given time, multiply groundspeed by time. The distance flown in 1 hr. 45 min. at a ground speed of 120 knots is: 120 × 1.75 = 210 NM (1hr 45min = 105 min ÷ 60 = 1.75hrs)

  12. Ground Speed • To find the ground speed, divide the distance flown by the time. • An airplane flies 270 NM in 3 hrs. • The ground speed is 270 ÷ 3 = 90 knots

  13. Who RemembersTVMDC?

  14. TVMDC • True Heading • Variation • Magnetic Heading • Deviation • Compass Heading Or: TV MAKES DUMB CADETS

  15. Useful or No? • Why?

  16. Finding Magnetic Heading • Use your True Heading and Variation to find your Magnetic Heading This is important because Variation can cause a big difference between the direction you want to go, and the direction that you actually go!

  17. Examples

  18. Finding Compass Heading • Using your Magnetic Heading and Deviation to find your Compass Heading We do this because there are errors in the compass due to manufacturing, age, friction etc. that may cause the compass to not point exactly the way you want to go

  19. Examples

  20. All Together Now!

  21. The “One in Sixty” Rule • An error in the track of one degree will cause an error in position of about one mile in a distance of 60 miles. Example: 3 degrees off track will cause an aircraft to be 3 miles out to the side.

  22. The E6B (Flight Computer) • For your Entrance Exam, you wont have to know the wind side of the E6B, only the Circular Side • This is the side that can be used to quickly work out conversions with out the use of a calculator or paper and pen

  23. The E6B Workings • The outside ring is distance and velocity • The inside ring is time All calculations can be done without using the flight computer by using the following formula: V = D V-velocity T D-distance T-time

  24. The E6B Cont. • The inner circle is made to rotate so you can line up the numbers in your equation to find the answer • The formulas and instructions are written on the inner circle for you if you forget

  25. E6B Cont.Velocity • To find Velocity, you move your inner circle so that your time is under your distance. The velocity will then be indicated over the black arrow at the “60 marker”

  26. E6B Cont.Time • Likewise, if you are looking for time, you move the black triangle under your velocity, and find your distance on the outer circle. Your time will be on the inner circle underneath the distance

  27. E6B Cont.Distance • To find the distance, move the black triangle under your velocity and use your time on the inner circle to show the distance on the outer circle shown above the time.

  28. Review

  29. And Thats It!Best of Luck on the Test!~Questions~

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