High Altimeter setting

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01-02-2008, 12:13 PM

#11

Ewfflyer

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Quote:

Originally Posted by hotelmode

I might be making this up, but I think I read somewhere if the pressure is higher than 31.00 you aren't supposed to fly because altimeters aren't calibrated for it. I would think it would only affect instrument flights though.

That's what I was thinking! But I'm too lazy to find it

01-02-2008, 12:20 PM

#12

Bloodhound

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Coincidentally, I saw a guy doing S-turns across a road today at about 500' AGL. It's not uncommon to see maneuvers where I'm at but not at 500'.

01-02-2008, 12:52 PM

#13

Laxrox43

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I remember one year when I was at FL Tech, we evac'd aircraft out of MLB for the yearly hurricanes. I remember our meter setting was flurting with 28.XX - and that blew my mind.

I guess you have to be a pilot, or a weather nut to appreciate mother nature?

01-02-2008, 12:54 PM

#14

Bloodhound

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When were you at FIT? I was there '94-'98 and instructed in '99.

01-02-2008, 02:35 PM

#15

Laxrox43

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03-04...where you in any fraturnities?

01-02-2008, 02:44 PM

#16

Bloodhound

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Pikes. You?

01-02-2008, 02:48 PM

#17

Laxrox43

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Quote:

Originally Posted by Bloodhound

Pikes. You?

Check your PM

01-02-2008, 02:57 PM

#18

jaded

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Quote:

Originally Posted by hotelmode

"Cold dry air masses can produce barometric pressures in excess of 31.00 inches of mercury. Because barometric readings of 31.00 inches of mercury or higher rarely occur, most standard altimeters do not permit the setting of barometric pressures above that level and are not calibrated to indicate accurate aircraft altitude above 31.00 inches of mercury. As a result, most altimeters cannot be set to provide accurate altitude readouts to the pilot in these situations."

Yeah... In May 94' they added that rule to the FARs stating that a TFR is to be where the barometric conditions of 31.00 inches or higher exist... can't find the exact part 91 paragraph though... I'm guessing it's not too uncommon in Alaska and Canada... any Alaska guys out there who can testify to this?

01-02-2008, 03:18 PM

#19

Photon

Blue Skies

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leave it to a student pilot to find it

§ 91.144 Temporary restriction on flight operations during abnormally high barometric pressure conditions.

(a) Special flight restrictions. When any information indicates that barometric pressure on the route of flight currently exceeds or will exceed 31 inches of mercury, no person may operate an aircraft or initiate a flight contrary to the requirements established by the Administrator and published in a Notice to Airmen issued under this section.

01-02-2008, 03:50 PM

#20

Stormy Knight

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My event took place well before 1994 (late 80's sometime). Fortunately, with that kind of pressure, it was a visual (not that I'm pretending to know the regs like that!!!)