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Stalling into wind.

Old 12th Aug 2014, 22:56
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Yes I'm a troll. And Aircraft do not weathercock into wind, okay suit yourself.

Just to be clear I see it happen everyday, student enters stall crosswind. Tries to set drift with rudder because we are getting blown downwind, aircraft is unbalanced and will always result in a wing drop stall.
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Old 13th Aug 2014, 08:52
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You see students change their approach to a stall due to the relative movement of the ground 3,000 ft below? And when the student is most likely looking ahead anyway?

All I can say is this is not my experience. At 3,000 ft the movement of a distant horizon is barely perceptible. If your students are getting frequent wing drops during stalling exercises the cause is not keeping the ball in the middle, not the wind.

Aircraft do of course weathercock into wind on the ground. Not at altitude.
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Old 13th Aug 2014, 09:27
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Yes I'm a troll. And Aircraft do not weathercock into wind, okay suit yourself.
And an instructor to boot. Following on from your statement in an earlier post I presume your were using a bit of sarcasm here. I hope you don't mean to apply the weather cocking statement to an airborne aircraft. If so, you'd better review your P of F.

Just to be clear I see it happen everyday, student enters stall crosswind. Tries to set drift with rudder because we are getting blown downwind, aircraft is unbalanced and will always result in a wing drop stall.
I've never seen this in over 4000 hours of instructing. What are you getting the student to use as a reference point? From your earlier post I get the impression you aren't actually telling them where to look. Whose fault is then if they are looking in the wrong place? I always get them to use something on the horizon or at least towards the horizon. Any drift is then imperceptible. Do you not also teach them to check the "ball" is centred?.
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Old 13th Aug 2014, 10:20
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Yes I'm a troll. And Aircraft do not weathercock into wind, okay suit yourself.
The only accurate statement you've made so far.
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Old 15th Aug 2014, 23:47
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I recently had a check flight with a CFI and he informed me that he had been practising stalls earlier that day, and it was so windy that he had to point into the wind. I just nodded.
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Old 16th Aug 2014, 12:10
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if you do multiple stalls in a light wind you could actually end up further away from home than you want!

Assuming you are flying a light training aircraft type that stalls at 45 knots then multiple stalls should not take you far in terms of distance over the ground.
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Old 17th Aug 2014, 09:38
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aeroplanes only ever fly into (an apparent) wind.
it is what gives them lift.

only numpties who's mindset is that of a person on the ground would think the way the poster has commented.
once your wheels are off the ground you are flying into the surrounding parcel of air.

you have to wonder these days if people really actually understand anything at the end of their training.
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Old 17th Aug 2014, 10:14
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As a student Stick and Rudder has been the most useful book I've read and I'd recommend it to anyone learning to fly. Chapter 6 Wind Drift covers this subject and Wolfgang explains it really well.
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Old 17th Aug 2014, 14:03
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I'm pretty sure the LAA test flight schedule calls for stalls to be carried out into wind.
The reason I prefer into wind (although not exclusively so) is that any head-on gusts will lead to symmetric effects on the aeroplane, whereas a gust from the side can lead to different lift effects as well as potential yaw, which will lead to a stall at a higher indicated air speed and a more likely wind drop.
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Old 17th Aug 2014, 15:35
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The reason I prefer into wind (although not exclusively so) is that any head-on gusts will lead to symmetric effects on the aeroplane, whereas a gust from the side can lead to different lift effects as well as potential yaw, which will lead to a stall at a higher indicated air speed and a more likely wind drop.
You get a lot of gusts at 3000' in your part of the world, do you?
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Old 17th Aug 2014, 15:48
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Have to say this thread is descending into something farcical now - must make sure I don't stall near a time vortex.....
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Old 17th Aug 2014, 16:28
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Mature, MarcK.
It's interesting that you think you know what height I stall at. I simply offered my personal thoughts based on my own experience. If you choose to speak to your students in the same way as you just responded to me, I feel sorry for them.
I have found the comments regarding managing displacement in strong winds during stalling to be valid. The first time I stalled a C172, a long time ago, we were actually moving backwards, with a negative value for the ground speed.
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Old 17th Aug 2014, 18:50
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I understand about stalling "into the wind" in an effort to keep yourself in the training area. I don't understand why some posters think it actually has an effect on the aircraft behavior with respect to the air.
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Old 20th Aug 2014, 23:01
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Have you ever had to correct the aircraft attitude in level flight because a gus has tipped you one way or another?
How much more likely is a gusty wind to tip you up if it's from the side as opposed to on the nose? Think about managing a final approach to land with a crosswind as opposed to straight down the slot.

If you're telling me that you don't ever have to correct for a gust in flight, you are telling fibs. A momentary upset by a crosswind gust causes a roll in the aircraft. I'm pretty sure I don't need to explain how this might lead to a wing drop and earlier stall likelihood when flying in less than smooth crosswind conditions.

That said, if you have a better explanation of why this theory is wrong, I would be interested in your thoughts. Learning is much better than being sarcastic and rude to your colleagues.
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Old 21st Aug 2014, 02:45
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I've not seen crosswind gusts in level flight at altitude. I have seen thermals, which come from below. Put a wing in one and that wing will rise. Talk to a glider pilot. Where do you think these crosswind gusts come from? And where did you learn basic meteorology?
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Old 21st Aug 2014, 03:44
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With much trepidation, I comment:

Do we really need reminding about the basic effect of wind on an aircraft in flight? The differences between course, track, heading, ground speed, indicated airspeed? Is this what we get when we rely exclusively on GPS and nav software? Never happened in the whizzwheel days.



We do not lay off the drift with rudder, and skid around the sky. We fly with the ball in the middle, wings level.

Only exceptions would be:
sideslipping to lose altitude without increasing speed
crosswind landings, especially through a wind gradient.

Straight stalls take place with reference to the parcel of air moving over the ground. At training altitude, wind speed and direction are factors only for positioning over the ground.

Before doing the exercise, don't forget HASELL, clearance turns and check for time vortices.
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Old 21st Aug 2014, 12:00
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MarcK - "at altitude"
Says it all - you obviously missed what I said before. I don't carry out final approaches at altitude, and neither do I necessarily explore slow flight and the incipient stall at altitude.

I teach Met at ATPL level.

My suggestion was that a potential reason for why some people are told to stall into wind is because of this. The fact that in training, we tend to operate at higher altitudes doesn't mean that everyone in the world carries out stalling at 5000'. The last time I looked at a stall (not in training) I was at 1500', lowest was at 800'.

It's clear that everyone has their own way of carrying out stalls, and of teaching them too. The fact that some people insist on stalling into wind doesn't make the lesson any less valid, does it?
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Old 21st Aug 2014, 13:07
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Originally Posted by MarcK
I've not seen crosswind gusts in level flight at altitude.
We called it CAT, back in the day.
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Old 21st Aug 2014, 13:25
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Originally Posted by WeeJeem
Originally Posted by MarcK
I've not seen crosswind gusts in level flight at altitude.
We called it CAT, back in the day.
Unless, of course, it wasn't CAT but was actually wave turbulence, in which case we called it "wave turbulence".


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Old 22nd Aug 2014, 05:51
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I can't say I've previously thought about this. I think there may be a little bit of mileage in the reference point argument, especially when demonstrating the symptoms of an impending stall (yaw at high AOA). Most of the other stuff, in my opinion, is nonsense.

I think I'll keep using HASELL without the addition of a W.
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