Quote:
Originally Posted by Fly4Pay  Generally, each 0.01 of altimeter difference equates to 10 feet of PA. SO--for a higher altimeter setting, you subtract from the field elevation, or for lower than standard you add. Here's your example:
30.37 Alt Setting
- 29.92 std day
--------------------
.45 difference x 1000 = 450 ft DECREASE (since pressure higher than standard)
1000 - 450 = 550 ft PA
This is not ABSOLUTELY exact, but it will be close enough for any chart you care to work. |
There's also a DA chart which you could use to come up with very similar (close) PA/ DA values. That could need some interpolation though. I don't see that chart on the POH, however, it's on the Jepp book for Private Pilot (Chap 8 Sec A pg 9). Using your example above, the value I came up with using the chart was 588 ft PA (i.e. 1000-412).