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another calculation?

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Old 26th Jun 2007, 19:16
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another calculation?

thanks to everyone for the other

i have another question

an airplane at FL 290 is required to commence descent when 50 nm from a VOR and to corss taht VOR at FL 80, its GS during the descent is 271kts, what is the minimum rate of descent requiered?

thanks
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Old 26th Jun 2007, 19:20
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21000/11

about 1900ft/min
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Old 26th Jun 2007, 20:09
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where the 11 comes from?
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Old 26th Jun 2007, 20:17
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Doh! 11 minutes. But the groundspeed will not remain constant in real life, so such calculations are not accurate. But they're a guide.
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Old 26th Jun 2007, 20:21
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271NMH/60Min=4,51NM per Min

50NM/4,51NM per Min= 11 minutes time for 21000 feet

21000/11=1900
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Old 26th Jun 2007, 21:05
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rate of descent

hello every one,
slope = 7 % x 271kt gs = 1897 ft/min.
bm
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