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When the winds aloft are light and variable, what wind direction and speed should I use for flight planning?
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What do you input in a navlog for wind direction and velocity, when the wind and temp forecast says 9900+18? I know 9900 means light and variable winds less than 5kts but how do I determine the average wind direction to use for my navlog?
weather flight-planning
edited Aug 23 at 21:49
Pondlife
48.1k7125261
asked Aug 23 at 21:26
AviateStudent
411
add a comment |Â
up vote
8
down vote
favorite
What do you input in a navlog for wind direction and velocity, when the wind and temp forecast says 9900+18? I know 9900 means light and variable winds less than 5kts but how do I determine the average wind direction to use for my navlog?
weather flight-planning
edited Aug 23 at 21:49
Pondlife
48.1k7125261
asked Aug 23 at 21:26
AviateStudent
411
1
Welcome to aviation.SE!
– Pondlife
Aug 23 at 21:50
3
Why not just consider the winds effectively calm? If you want to be conservative, give yourself a 5kt. headwind.
– abelenky
Aug 23 at 22:01
add a comment |Â
up vote
8
down vote
favorite
up vote
8
down vote
favorite
What do you input in a navlog for wind direction and velocity, when the wind and temp forecast says 9900+18? I know 9900 means light and variable winds less than 5kts but how do I determine the average wind direction to use for my navlog?
weather flight-planning
edited Aug 23 at 21:49
Pondlife
48.1k7125261
asked Aug 23 at 21:26
AviateStudent
411
What do you input in a navlog for wind direction and velocity, when the wind and temp forecast says 9900+18? I know 9900 means light and variable winds less than 5kts but how do I determine the average wind direction to use for my navlog?
weather flight-planning
edited Aug 23 at 21:49
Pondlife
48.1k7125261
asked Aug 23 at 21:26
AviateStudent
411
edited Aug 23 at 21:49
Pondlife
48.1k7125261
edited Aug 23 at 21:49
Pondlife
48.1k7125261
edited Aug 23 at 21:49
Pondlife
48.1k7125261
48.1k7125261
asked Aug 23 at 21:26
AviateStudent
411
asked Aug 23 at 21:26
AviateStudent
411
asked Aug 23 at 21:26
AviateStudent
411
411
1
Welcome to aviation.SE!
– Pondlife
Aug 23 at 21:50
3
Why not just consider the winds effectively calm? If you want to be conservative, give yourself a 5kt. headwind.
– abelenky
Aug 23 at 22:01
add a comment |Â
1
Welcome to aviation.SE!
– Pondlife
Aug 23 at 21:50
3
Why not just consider the winds effectively calm? If you want to be conservative, give yourself a 5kt. headwind.
– abelenky
Aug 23 at 22:01
1
1
Welcome to aviation.SE!
– Pondlife
Aug 23 at 21:50
Welcome to aviation.SE!
– Pondlife
Aug 23 at 21:50
3
3
Why not just consider the winds effectively calm? If you want to be conservative, give yourself a 5kt. headwind.
– abelenky
Aug 23 at 22:01
Why not just consider the winds effectively calm? If you want to be conservative, give yourself a 5kt. headwind.
– abelenky
Aug 23 at 22:01
add a comment |Â
2 Answers
2
active
oldest
votes
up vote
10
down vote
Light and variable means there's no meaningful windspeed or direction, so you can just ignore it. For planning purposes, you can simply plan as if the wind was calm.
But, it's very possible that the winds will actually be stronger and more directional than forecast. You should check your actual track and times against what you planned, and adjust your navlog in flight as needed. That's one of the cross-country navigation skills that pilots are expected to learn.
answered Aug 23 at 22:03
Pondlife
48.1k7125261
add a comment |Â
up vote
-3
down vote
The best technique when planning your flight is to assume a 15knot headwind ALL the time. This allows for climbs, descents, and delays, and works quite nicely.
answered Aug 24 at 10:15
RAC
1,86737
3
"Best technique"? Maybe the easiest, but hardly the best.
– abelenky
Aug 24 at 12:02
add a comment |Â
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
10
down vote
Light and variable means there's no meaningful windspeed or direction, so you can just ignore it. For planning purposes, you can simply plan as if the wind was calm.
But, it's very possible that the winds will actually be stronger and more directional than forecast. You should check your actual track and times against what you planned, and adjust your navlog in flight as needed. That's one of the cross-country navigation skills that pilots are expected to learn.
answered Aug 23 at 22:03
Pondlife
48.1k7125261
add a comment |Â
up vote
10
down vote
Light and variable means there's no meaningful windspeed or direction, so you can just ignore it. For planning purposes, you can simply plan as if the wind was calm.
But, it's very possible that the winds will actually be stronger and more directional than forecast. You should check your actual track and times against what you planned, and adjust your navlog in flight as needed. That's one of the cross-country navigation skills that pilots are expected to learn.
answered Aug 23 at 22:03
Pondlife
48.1k7125261
add a comment |Â
up vote
10
down vote
up vote
10
down vote
Light and variable means there's no meaningful windspeed or direction, so you can just ignore it. For planning purposes, you can simply plan as if the wind was calm.
But, it's very possible that the winds will actually be stronger and more directional than forecast. You should check your actual track and times against what you planned, and adjust your navlog in flight as needed. That's one of the cross-country navigation skills that pilots are expected to learn.
answered Aug 23 at 22:03
Pondlife
48.1k7125261
Light and variable means there's no meaningful windspeed or direction, so you can just ignore it. For planning purposes, you can simply plan as if the wind was calm.
But, it's very possible that the winds will actually be stronger and more directional than forecast. You should check your actual track and times against what you planned, and adjust your navlog in flight as needed. That's one of the cross-country navigation skills that pilots are expected to learn.
answered Aug 23 at 22:03
Pondlife
48.1k7125261
answered Aug 23 at 22:03
Pondlife
48.1k7125261
answered Aug 23 at 22:03
Pondlife
48.1k7125261
answered Aug 23 at 22:03
Pondlife
48.1k7125261
48.1k7125261
add a comment |Â
add a comment |Â
up vote
-3
down vote
The best technique when planning your flight is to assume a 15knot headwind ALL the time. This allows for climbs, descents, and delays, and works quite nicely.
answered Aug 24 at 10:15
RAC
1,86737
3
"Best technique"? Maybe the easiest, but hardly the best.
– abelenky
Aug 24 at 12:02
add a comment |Â
up vote
-3
down vote
The best technique when planning your flight is to assume a 15knot headwind ALL the time. This allows for climbs, descents, and delays, and works quite nicely.
answered Aug 24 at 10:15
RAC
1,86737
3
"Best technique"? Maybe the easiest, but hardly the best.
– abelenky
Aug 24 at 12:02
add a comment |Â
up vote
-3
down vote
up vote
-3
down vote
The best technique when planning your flight is to assume a 15knot headwind ALL the time. This allows for climbs, descents, and delays, and works quite nicely.
answered Aug 24 at 10:15
RAC
1,86737
The best technique when planning your flight is to assume a 15knot headwind ALL the time. This allows for climbs, descents, and delays, and works quite nicely.
answered Aug 24 at 10:15
RAC
1,86737
answered Aug 24 at 10:15
RAC
1,86737
answered Aug 24 at 10:15
RAC
1,86737
answered Aug 24 at 10:15
RAC
1,86737
1,86737
3
"Best technique"? Maybe the easiest, but hardly the best.
– abelenky
Aug 24 at 12:02
add a comment |Â
3
"Best technique"? Maybe the easiest, but hardly the best.
– abelenky
Aug 24 at 12:02
3
3
"Best technique"? Maybe the easiest, but hardly the best.
– abelenky
Aug 24 at 12:02
"Best technique"? Maybe the easiest, but hardly the best.
– abelenky
Aug 24 at 12:02
add a comment |Â
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1
Welcome to aviation.SE!
– Pondlife
Aug 23 at 21:50
3
Why not just consider the winds effectively calm? If you want to be conservative, give yourself a 5kt. headwind.
– abelenky
Aug 23 at 22:01