Servo altimeter
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Servo altimeter
I am not able to figure out this question. Please help.
A servo altimeter has a quoted accuracy of 1hPa at MSL. The accuracy in the standard atmosphere is ?
A) +-50ft at 10 000ft and +- 100ft at 40 000ft
B) +-50ft at 20 000ft and +-90ft at the tropopause
C) +-27ft at MSL and +-50ft at 10 000ft
A servo altimeter has a quoted accuracy of 1hPa at MSL. The accuracy in the standard atmosphere is ?
A) +-50ft at 10 000ft and +- 100ft at 40 000ft
B) +-50ft at 20 000ft and +-90ft at the tropopause
C) +-27ft at MSL and +-50ft at 10 000ft
Join Date: May 1999
Location: Bristol, England
Age: 65
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As you probably figured out you are being asked how many feet per hPa at different levels. In EASA-land we tend to remember the values for SL, the 500 hPa level and the 200 hPa level which are:
SL 27 ft/hPa
500 hPa (18 000 ft) 50 ft/hPa
200 hPa (39 000 ft) 100 ft/hPa
B looks best to me
SL 27 ft/hPa
500 hPa (18 000 ft) 50 ft/hPa
200 hPa (39 000 ft) 100 ft/hPa
B looks best to me
