Super Owl
Sorry for delayed reply - was not in easy reach of PC yesterday, due to business trip to 'da big smoke' yesterday. I'm probably being slower than a tortoise on a wet unmown grass uphill surface (now, what's the % age margin to add for that??
), but looking at your post
For example, Airfield elevation 1000ft, QNH is 990. Temp 8C.
Firstly you need to work out your pressure altitude.
1000 + [(1013-980) x 30] (30 being no. of feet per millibar)
, I didn't understand where the '980' came from. Was this just a typo and you meant 990, in which case the Pressure Altitude is 1690 ft.
As I say, I'm probably barking up the incorrect arbour, but am willing to face a jury of my peers!
