another calculation?

[ARGPILOT]

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

[hetfield]

21000/11

about 1900ft/min

[ARGPILOT]

where the 11 comes from?

[Rainboe]

Doh! 11 minutes. But the groundspeed will not remain constant in real life, so such calculations are not accurate. But they're a guide.

[Chally604]

271NMH/60Min=4,51NM per Min

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

21000/11=1900

[blackmail]

rate of descent

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