Wind shear

[2ADoc]

THe landing wasn't that rough, you did get a little low, and probably a little slow, bad deal there.  But my main question is why were you flying in the right seat?  Your instructor should have been there and you should have been in the left.

[Tupac]

THe landing wasn't that rough, you did get a little low, and probably a little slow, bad deal there.  But my main question is why were you flying in the right seat?  Your instructor should have been there and you should have been in the left.

I did get low, but I wasnt slow. My groundspeed was about 30 so it did give the illusion of me being very slow. I was in the left seat, my instructor was in the right seat filming.

[2ADoc]

Ah ok I thought you might have a hat mounted cam or something like that.  A ground speed of 30 hell that means you were in 40-50 knot winds that is ridiculous,  glad you didn't have to land with a cross wind.

[Dichotomy]

so are ALL the girls in Nebraska fat?

[WYOKIDIII]

so are ALL the girls in Nebraska fat?

nope

http://frathousesports.com/nebraska-cheerleaders-pictures?pid=1462

[Dichotomy]

they're all imports 

[WYOKIDIII]

you never specified origin...just location 

[flight17]

We had Wind Shear yesterday from the surface to 2000ft up to 45kts.

[NatCigg]

by definition is that not a wind moving in opposite directions.  this being most severe for aviation when a plane is on landing.  so, 45 knots of headwind could become .. say 45 knots of tailwind, thus a 90 knt change in air flow over the wing.  for a plane flying a 80 knot approach this would surely send the pilot into a frenzy and possibly the ground. ?

[MachFly]

by definition is that not a wind moving in opposite directions.  this being most severe for aviation when a plane is on landing.  so, 45 knots of headwind could become .. say 45 knots of tailwind, thus a 90 knt change in air flow over the wing.  for a plane flying a 80 knot approach this would surely send the pilot into a frenzy and possibly the ground. ?

Technically yes. In reality the numbers are not that high, if the wind changes 180 degrees than the wind speed is probably not more than 10. If the wind is ~30kts than it will stay in the same general direction, might switch 30 degrees but not much more. Also you can have wind direction staying the same but speed changing 20kts in a few hundred feet.
For example your on a final approach at 85kts and as you descend from 300ft AGL to 200ft AGL you loose 15kts of heading therefore lowering your speed to 70kts. At this point you got to make sure that you don't stall out.
Gusts can have the same effect and are a lot more common.

[icepac]

If you have plenty of runway length, carrying extra speed is the ticket.

If you're landing on a runway such as Woodbridge in Virginia (now gone) that's 2000 feet with high trees on each end, best to announce on unicom you are shooting a missed approach drill and buzz the runway while watching the airspeed indicator for abrupt changes as you descend.

Then land with the information you just gathered.

Also.....don't trust the tetrahedron since I have seen many stuck by weeds growing up under them.

My first solo cross country to a uncontrolled field featured a tetrahedron that was stuck pointing the wrong way and I sweated out a longer landing on a short runway than was comfortable.

Yes, I walked out, cleared the weeds and complained to the guy fueling the plane.

[MachFly]

tetrahedron

 
Is that that old metal wind "sock"? 

[Tupac]

Is that that old metal wind "sock"? 

Yes. I like da tetrahedron. We've got a couple of them around here.

[WYOKIDIII]

You mean like this ?

http://www.wrds.uwyo.edu/sco/climateatlas/wind.html

[flight17]

Technically yes. In reality the numbers are not that high, if the wind changes 180 degrees than the wind speed is probably not more than 10. If the wind is ~30kts than it will stay in the same general direction, might switch 30 degrees but not much more. Also you can have wind direction staying the same but speed changing 20kts in a few hundred feet.
For example your on a final approach at 85kts and as you descend from 300ft AGL to 200ft AGL you loose 15kts of heading therefore lowering your speed to 70kts. At this point you got to make sure that you don't stall out.
Gusts can have the same effect and are a lot more common.

Our sustained wing speeds were about 20Kts with mid 20's gusts. We have hills all around the airport and there is a drop off on the end of runway 28 (if you were using 28 for t/o or landing) in which there is a vally about 2000ft wide that runs perpendicular to the runway. Plus we have small mounds that are all scattered around the airport grounds that cause some wierd wind patterns. I call them mounds because they arent really hills, but its just where you can see they have cut back the land to put the airport in.