Mountain flying guide
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Mountain flying guide
Hello,
I would like to ask about help:
I'm preparing myslef to fly in mountain areas so I'm looking for any guide about mountain flying.
PM or link.
Greets and thanks
Jacek
I would like to ask about help:
I'm preparing myslef to fly in mountain areas so I'm looking for any guide about mountain flying.
PM or link.
Greets and thanks
Jacek
Join Date: Sep 2012
Location: Oxford
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In terms of books, you may wish to look at Helicopter Pilot's Manual: Mountain Flying and Advanced Techniques by Norman Bailey.
It isn't a substitute for proper training though.
Matthew
It isn't a substitute for proper training though.
Matthew
Revise your knowledge of Density Altitude and how it affects the performance of your helicopter.
Find some internet information about visual illusions caused by lack of visual horizon.
Sharpen up your instrument flying - mountain flying is a visual/instrument balance because of the second point above.
Revise your meteorological knowledge, especially regarding wind (gradient, katabatic, anabatic etc)
Think about the air as a fluid - when faced with the mountain terrain, try to visualise how a large bucketful of water would swirl around the various features and be aware that the upwind feature will influence the wind's effects on any features close downwind.
Have a pre-planned escape route (low level) in case you are caught out by the weather, it's often very changeable in the mountains and going IMC in that environment is very scary!
Enjoy the view
Find some internet information about visual illusions caused by lack of visual horizon.
Sharpen up your instrument flying - mountain flying is a visual/instrument balance because of the second point above.
Revise your meteorological knowledge, especially regarding wind (gradient, katabatic, anabatic etc)
Think about the air as a fluid - when faced with the mountain terrain, try to visualise how a large bucketful of water would swirl around the various features and be aware that the upwind feature will influence the wind's effects on any features close downwind.
Have a pre-planned escape route (low level) in case you are caught out by the weather, it's often very changeable in the mountains and going IMC in that environment is very scary!
Enjoy the view
Join Date: Dec 2001
Location: Philadelphia PA
Age: 73
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crab:
Hate to be pedantic, but for turbines, it's not density altitude - PA +OAT is the correct answer, 9,000'PA and -40°C is the same DA as 2,000PA and +40°C.
Hate to be pedantic, but for turbines, it's not density altitude - PA +OAT is the correct answer, 9,000'PA and -40°C is the same DA as 2,000PA and +40°C.
Shawn, I'm sure you are right but I wasn't just thinking engines, more along the lines of TR authority, lively Nr and high pitch angles for hovering OGE.
The rough guide to DA we have always used is DA = PA plus or minus 120T where T is the difference between ISA and the real world temperature in degrees C assuming a lapse rate of 2 deg/1000'. That gives 4560 and 5240 respectively for your examples.
However, the Easyweigh program we use for performance, using your figures, gives DAs of 4243' for 9000' -40 and 5244' for 2000' +40.
What calculation are you using?
The rough guide to DA we have always used is DA = PA plus or minus 120T where T is the difference between ISA and the real world temperature in degrees C assuming a lapse rate of 2 deg/1000'. That gives 4560 and 5240 respectively for your examples.
However, the Easyweigh program we use for performance, using your figures, gives DAs of 4243' for 9000' -40 and 5244' for 2000' +40.
What calculation are you using?
