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#11
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Stalls and Thoughts
Roger wrote:
On Fri, 14 Mar 2008 09:16:28 -0700 (PDT), "Ol Shy & Bashful" wrote: On Mar 14, 11:11 am, "Ol Shy & Bashful" wrote: What the hell.....why do we work at teaching stalls and recoveries? It has gone to stall recognition and avoidance which is good. Does it teach the proper things? How much of a new students time is spent flying in slow flight at the low end of the performance envelope? Isn't that where all the nasty things can happen? I fly with students that become paranoid when they hear the least little blip from the stall waring horn, and want to push the nose over to get airspeed back. They fail to realize the whole point of the training. OK Here we go....... I teach slow flight with and without flaps at the lowest edge of the flight envelope and req what the hell happened?...... and to follow on to the above..... flight envelope and require my students to make a lot of turns to headings while holding altitude and airspeed. I'll have them pitch slightly to nibble on a stall while in the turn and even to go into a stall and recover back to the nibble area instead of pushing the nose over and watching the VSI go to 1000fpm and lose 100'+ while the airspeed goes back up to Vx. We are learning to avoid a stall when altitude is at a premium either on approach or on a departure or go-around. How much altitude can be sacrificed? What the hell...lets have a donnybrook on the issue and keep things interesting. Ol S&B I think all of the above are important and particularly so if the pilot moves up to high performance or even plans on doing so. Even in my last flight review we flew around at minimum controllable airspeed for a while. To back up, I think only teaching stall avoidance is out right bad and dangerous. I say that as there are times if I pilot flys enough they are likely to encounter an inadvertent stall even when playing by the rules. An unexpected vertical gust in one instance. A very strong gust from the rear is another . In the latter the wing may not be stalled or it may be, but the lift has been drastically reduced. But...flying around for a while in a Bo at Vmc all the while nibbling at a stall while making shallow turns and holding altitude is quite an exercise. For one, if it's hanging on the edge of a stall and you use an aileron to raise a wing you just may stall that wing. which results in a very fast roll to inverted if the pilot doesn't catch it with the rudder. The Deb and F33 WANT to drop a wing and spin. Their stall characteristics are very different than the 150, 172, and Cherokees used in training. In doing stalls like this they are an absolutely rudder only airplane. When doing stalls the instructors from the Air Safety foundation even _block_ the yoke to prevent the pilot from using the ailerons. Departure stalls even at full power aren't all that bad and although abrupt can be done without losing any altitude. Accelerated stalls in a coordinated turn are pretty much a non event. When the stall breaks you just let the nose go in the direction it wants by easing off on the back pressure. Uncoordinated can get interesting, or downright exciting depending on the pilot. Again, if proficient instinct has you pointing the nose in the direction it wants to go whether the top wing is going over or the bottom one is going under. As soon as the nose it pointed where it wants to go the roll stops and you can recover but there is absolutely no time to stop and think about recovery techniques. Approach stalls with gear and flaps down and the plane becomes a different animal where the pilot has to know what it's going to do. If you don't it'll show a nasty disposition by turning around and biting the pilot in the back side leaving teeth marks. It's going to want to drop a wing and spin. It becomes a rudder only airplane. Touch an aileron and it will ABRUPTLY roll over into a spin. These are best practiced at 5,000 or above. With practice the pilot should be able to hold the plane in a stall but it's like walking on a tight rope using the rudder for balance. OTOH if back pressure is released (Don't shove the nose down) at the first break it'll just fly on out of the stall with little or no loss of altitude. From what I've seen in trainers one of the biggest errors is "shoving the nose down". It depends on the plane and conditions, but normally the only thing needed to recover is release the back pressure on the yoke. Roger Halstead (K8RI & ARRL life member) (N833R, S# CD-2 Worlds oldest Debonair) www.rogerhalstead.com All good points. There actually is an argument that can be made about accident stats that suggests the "avoid the stall through recognition" approach hasn't been as effective in decreasing the stall/ spin situation as has the improvement in general aircraft design. Actually this argument can be made for both the period when spin training was in effect and during the period where stall recognition has been stressed. No matter how this pie is cut, and no matter what side of the argument one is on, in my opinion there is absolutely no substitute for pilots seeking out and taking some kind of advanced program after the certificate has been obtained, that deals directly with extreme unusual attitude recovery, spins, and advanced stall training. As an aerobatic instructor, one has the opportunity to fly with all kinds of pilots who have come through the program; each one taught by a different instructor. You just wouldn't believe the skill differences in these pilots. Those coming through a learning curve involving emphasis on accuracy in stall RECOVERY as opposed to stall recognition, in my opinion are better prepared and posess a much higher degree of basic flying skills than their "recognition" counterparts. The bottom line on this issue is that it's quite simple really. The deeper a pilot goes into the basics involving flight in the left side of the envelope, the better that pilot will be. This reason is the exact reason I stress post license training so strongly. -- Dudley Henriques |
#12
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Stalls and Thoughts
Ahh common Dudley, admit it... The only reason you want the student to
get inverted so's you can dream about pulling through the split S and bringing those 50's to bear just ahead of the bogey.... denny |
#13
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Stalls and Thoughts
How much of a new students time is spent
flying in slow flight at the low end of the performance envelope? Isn't that where all the nasty things can happen? I spent a fair amount of time, probably close to an hour or two in slow flight. Maybe a little longer. I don't think it's the case that slow flight is where all the nasty things can happen. A stall can happen at any speed in any flight attitude, and may be worse at higher speeds in certain attitudes than low speed, upright, straight and level. |
#14
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Stalls and Thoughts
Denny wrote:
Ahh common Dudley, admit it... The only reason you want the student to get inverted so's you can dream about pulling through the split S and bringing those 50's to bear just ahead of the bogey.... denny To tell you the truth, I spent most of the time teaching them to ROLL out instead of pulling through that Split S :-)))) -- Dudley Henriques |
#15
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Stalls and Thoughts
On Mar 15, 12:13*pm, Bertie the Bunyip wrote:
wrote in news:925e8025-8f81-4991-9a0b- Yup, your approach is certainly consistent with the PTS. Private pilots are expected to perform slow flight at "an airspeed at which any further increase in angle of attack, increase in load factor, or reduction in power, would result in an immediate stall", and recover from power-off and power-on stalls "with a minimum loss of altitude appropriate for the airplane". There's a difference between being able to demonstrate this and being comfy or even competent doing it. . That's true. The CFIs who taught me treated practice stalls as routine and expected their students to do so too. But I don't know if that's typical these days, or if I was just lucky. |
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Stalls and Thoughts
On Mar 14, 2:40 pm, Deadstick wrote:
I haven't done any instructing recently, but when I did, I taught slow flight, stall recognition and avoidance AND stall entry & recovery. I don't think they have be be exclusive of one another. Plus I think learning to recognize and avoid stalls is probably a better risk-management strategy given that it can be easily learned and mastered by pilots of all skill levels. In principle I agree that ALL pilots should be fully competent at slow airspeeds and at recovering from stalls, but I would also tend to say that there's a lot more that we can teach pilots before we set them free to fly on their own. I am curious as to the meaning of the phrase "..dragging it in". As in "...he turned on final, dragging it in". I knew a pilot at A&M who died in a C182 while "dragging it in". I assumed at the time that this was slow flight and without further details could only assume that he inadvertently stalled the plane at some point. I also inferred that this phrase could also say "was behind the power curve". Any thoughts would be appreciated. (IIRC, he did not spin in). Richard |
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Stalls and Thoughts
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#19
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Stalls and Thoughts
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#20
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Stalls and Thoughts
On Mar 15, 4:33 pm, Dudley Henriques wrote:
The analogy "dragging it in" refers to having the airplane configured behind the power curve or if you wish, in the area of reverse command, on final approach....a very dangerous situation. -- Dudley Henriques Dangerous, but certainly useful at times! |
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