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Old 10-25-2007, 08:55 PM
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Default help with DA ASAP

zip code 21713
im using the da calc in the sticky
altidude is 1450
air temp 56.3
Altimeter Setting am i using the right number? this is what i was using Pressure: 18.79 in / 636.2 hPa (Rising)
dew piont 53

im geting a +16779ft am i using it correct?
Old 10-25-2007, 09:11 PM
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that's wierd! i believe the altimeter number is incorrect!?!?!
Old 10-25-2007, 09:13 PM
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what number do i use then?
Old 10-25-2007, 09:16 PM
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but if you do it for 21714 its a -156
Old 10-25-2007, 11:51 PM
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u have the right factor being the altimeter setting, i just think the reading for that areas altimeter is reading wrong!
Old 10-26-2007, 07:47 AM
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a reading of 18.79"Hg would mean that you are roughly 11,000 feet above sea level. Sea level pressure is 29.92"Hg

Maryland is definably NOT 11,000' MSL

You would pass out in 30 to 45 min at that altitude. Pilots in non pressurized aircraft are advised to have supplemental O2 if they intend to be at that altitude for longer than 30min. That ALT. reading is WAY off




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