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#11
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On Fri, 9 Sep 2005 23:51:54 -0400, "Icebound"
wrote: wrote in message roups.com... stall warning horn does not "get louder" it either sounds or it doesn't. Did you mean that generically for all aircraft? ... or in this particular case only? Perhaps it's to do with the way the horn is activated. I seem to remember the 172's horn getting louder the closer to stall you got (pneumatically activated), but don't recall that phenomenon with the 182's horn (electric switch)? |
#12
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"Peter Clark" wrote in message ... On Fri, 9 Sep 2005 23:51:54 -0400, "Icebound" wrote: wrote in message groups.com... stall warning horn does not "get louder" it either sounds or it doesn't. Did you mean that generically for all aircraft? ... or in this particular case only? Perhaps it's to do with the way the horn is activated. I seem to remember the 172's horn getting louder the closer to stall you got (pneumatically activated), but don't recall that phenomenon with the 182's horn (electric switch)? Well, the 172's horn seems to be basically the same principle as blowing across the mouth of an open beer bottle. If you blow lightly, it makes a gentle hum and if you blow hard, it gets loud. I don't know how other stall horns were designed, but it was my impression that a stall horn is supposed to be designed to go off a little before the true stall. For the 172, this means that at a certain AOA, there is *some* air going by across the opening, producing *some* sound, while you still fly not fully stalled. It is not until a full stall that the maximum amount of air is flowing across the opening, producing the loudest sound. Now the 172 has a pretty thick leading edge, which may contribute to the way this seems to work. Since that is all that I am familiar with.... ....does that mean that for most other aircraft, I would have to be aware that the stall horn will go off suddenly and completely? |
#13
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"Marco Leon" wrote in message ups.com... See video of a hard(ish) landing at: http://www.flightlevel350.com/viewer.php?id=4137 Did this guy land a bit short of the runway or was his glidepath a bit too shallow? Something else? It's hard to tell from the video but maybe some PA-32 drivers can give some insight. Or maybe someone fluent in French can translate what was said as a comment. Marco Leon This is the classic got a video camera in the back seat gotta make a good landing blooper. All of your really good landings are not going to be seen by anyone, but all of your bad ones will be... Anyway, this approach was pretty sloppy from way out. The nose was all over the place; I was thinking they were playing against a gusty wind but they settled down late in the approach... |
#14
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"Icebound" wrote
Well, the 172's horn seems to be basically the same principle as blowing across the mouth of an open beer bottle. Not all C-172s...some have the electric vane. The one that I fly does. I don't know how other stall horns were designed, but it was my impression that a stall horn is supposed to be designed to go off a little before the true stall. (c) During the stall tests required by §23.201(b) and §23.203(a)(1), the stall warning must begin at a speed exceeding the stalling speed by a margin of not less than 5 knots and must continue until the stall occurs. ...does that mean that for most other aircraft, I would have to be aware that the stall horn will go off suddenly and completely? Yes, but at least 5 knots above the actual stall per Part 23. Bob Moore ATP CFI |
#15
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Looks like a landing I made last week. I was lazy and didn't fly a
pattern sice no one was around and my flight path was taking me directly on the final approach course. I always seem to misjudge height from a long way out and got flat coming in over the numbers. Then it is just a matter of slowing up and pulling back into a pseudo-flare which really results in a 3-point landing. I think that the video makes it look worse than it probably was although he did get a bounce out of it. Since it appears that he will be able to use the airplane again I would call it a good landing. :-) Jon Kraus '79 Mooney 201 4443H @ TYQ Marco Leon wrote: See video of a hard(ish) landing at: http://www.flightlevel350.com/viewer.php?id=4137 Did this guy land a bit short of the runway or was his glidepath a bit too shallow? Something else? It's hard to tell from the video but maybe some PA-32 drivers can give some insight. Or maybe someone fluent in French can translate what was said as a comment. Marco Leon |
#16
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"Jon Kraus" wrote in message
... Since it appears that he will be able to use the airplane again I would call it a good landing. :-) (The old saying) A 'good' landing is one you can walk away from, a 'great' landing is one that you can reuse the plane... So far, all my landings have been 'great'! ;-) -Greg B. |
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