Why do you need a flight plan?

A flight plan includes the route the crew will fly and specifies altitudes and speeds. It also provides calculations for how much fuel the airplane will use and the additional fuel it will need to carry to meet various requirements for safety (see fig.



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Where a flight plan is required, it must be submitted before departure to an air traffic services reporting office or, during flight, transmitted to the appropriate air traffic services unit or air-ground control radio station, unless arrangements have been made for submission of repetitive flight plans (RPLs).

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VFR flight plans must be filed whenever an aircraft plans a cross-country flight and plans to operate under VFR flight rules. However, VFR flight plans are not required, only strongly recommended by the FAA, when an aircraft flies through class B airspace.

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In the 1900s, Hungarian physicist Theodore von Kármán determined the boundary to be around 50 miles up, or roughly 80 kilometers above sea level. Today, though, the Kármán line is set at what NOAA calls “an imaginary boundary” that's 62 miles up, or roughly a hundred kilometers above sea level.

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Four forces affect an airplane while it is flying: weight, thrust, drag and lift.

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Filing a flight plan with the FAA is optional when flying VFR unless your flight takes you across the Air Defense Identification Zone (ADIZ), a Distance Early Warning Identification Zone (DEWIZ), or international airspace.

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ForeFlight is the essential, integrated flight app that makes planning, flying, and logging flights a joy.

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