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HelicopterOff Topics › Cross Country Planning Question calculating flight time.
07-10-2008 10:59 PM  9 years agoPost 1
Chickenx10

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Ft Drum NY

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hey, im doing my first cross country in a full scale airplane for my PPL, and i had a quick question about figuring out the time. lets just say the wind is at 0, and im flying at 106 mph, now i can measure the route in either Statute or Nautical miles, but which one do i use? because one comes out at 1.2 hours, and the other at 1.4 hours. The trip is 131 nautical miles and 151 statute miles, but i dont know which one to use?!

Raptor 50 Titan / OS 50 Hyper / GY401 w/ 9254

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07-10-2008 11:11 PM  9 years agoPost 2
RonHill

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FLL, FL

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If using Miles per hour use Statute miles.

If using Knots, use Nautical Miles.

106 mph = 92.11148 knots

131 nautical miles at 92 knots= 1.423
151 statute miles at 106 MPH= 1.424

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07-10-2008 11:18 PM  9 years agoPost 3
Chickenx10

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ahh i see thanks for the help

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07-10-2008 11:26 PM  9 years agoPost 4
RonHill

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FLL, FL

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No problem.

I use whatever the POH says, and do my planning from there.

If the POH says knots, I use nautical miles
If the POH says MPH, I do it all in Statute miles.

A little memory aid:
You live in the US and the STANDARD is in STAtute miles
Knots is (Knot)ical miles.

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07-10-2008 11:47 PM  9 years agoPost 5
Flint325

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you will want to use knots, that is what you airspeed indicator gives you in the aircraft.

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