PPRuNe Forums - View Single Post - Trip distance vs cruising alt: is there a rule of thumb?

22nd Jun 2005, 18:34

#9 (permalink)

LearjetGA

Join Date: Nov 2002

Location: out of my suitcase

Age: 51

Posts: 59

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I consider 10% of the trip length and add 5:

100 NM => 10+5=> FL 150

200 NM => 20+5=> FL 250

Works really good with 2000 FPM climb and descent.