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#1
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On 1 Jan 2007 15:19:21 -0800, "Jay Honeck" wrote:
Is this an admission that you can't stay several minutes ahead of your plane? You'd better let your wife do the flying from now on. ![]() Ouch. That's low... ;-) The point is, you don't have to stay that far ahead of any plane moving at 130 knots. When you're moving at 250 knots, however, in a plane the size of a 747, you make tiny little movements that make your aircraft move to a spot in the sky a full minute or three ahead. This is why simmers trying to land a 747 (myself included) usually crash. We're trying to raise a wingtip with abrupt turns of the yoke (as we would in a Cherokee, for example) -- and that just doesn't work in an aircraft the size of a destroyer. Our pro pilot NEVER made a motion that you could even see, yet the 747 ended up greasing the runway. It was fun to watch. Get hooked up to fly a Bo for a few hours. They are light on the controls and quick. I'll bet you'll enjoy it. As I've said before, I've had experienced pilots put it into a PIO with 2 Gs out of the bottom and zero over the top. Actually it's quite common. I can fix it by telling them to look outside and put the horizon at a specific spot in the windshield or covering the VSI which forces them to look outside. The Bo, or Deb in this case is quick enough I can do a PIO like that and keep the VSI pretty much centered. Roger Halstead (K8RI & ARRL life member) (N833R, S# CD-2 Worlds oldest Debonair) www.rogerhalstead.com |
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Roger writes:
I've had experienced pilots put it into a PIO with 2 Gs out of the bottom and zero over the top. I give up: What's a PIO? Isn't it bad for your aircraft to put it through 2 G stresses? -- Transpose mxsmanic and gmail to reach me by e-mail. |
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I give up: What's a PIO?
Pilot Induced Oscillation. It's usually something that happens during the landing flare, but can happen on a short-coupled aircraft in any phase of flight. I wasn't aware that a Bonanza was in that category, but apparently it is. Isn't it bad for your aircraft to put it through 2 G stresses? Planes are built to handle it. -- Jay Honeck Iowa City, IA Pathfinder N56993 www.AlexisParkInn.com "Your Aviation Destination" |
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Jay Honeck writes:
Pilot Induced Oscillation. It's usually something that happens during the landing flare, but can happen on a short-coupled aircraft in any phase of flight. Like the book _Airframe_. I guess I should have remembered it. I wasn't aware that a Bonanza was in that category, but apparently it is. I've read about phugoid (what a bizarre word!) oscillations, both pilot-induced and otherwise, and apparently they are universal to some degree. When I first encountered these in simulation, I thought it was an artifact of the simulation. Planes are built to handle it. Well, a 737 can handle only 2.5 Gs. That's not a very wide margin of safety. -- Transpose mxsmanic and gmail to reach me by e-mail. |
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In article ,
Mxsmanic wrote: Jay Honeck writes: Pilot Induced Oscillation. It's usually something that happens during the landing flare, but can happen on a short-coupled aircraft in any phase of flight. Like the book _Airframe_. I guess I should have remembered it. I wasn't aware that a Bonanza was in that category, but apparently it is. I've read about phugoid (what a bizarre word!) oscillations, both pilot-induced and otherwise, and apparently they are universal to some degree. When I first encountered these in simulation, I thought it was an artifact of the simulation. Planes are built to handle it. Well, a 737 can handle only 2.5 Gs. That's not a very wide margin of safety. I don't know where MX gets hid info, but transport category are certificated to 3.3g max, 4.9g ultimate loading (standard category). |
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Orval Fairbairn writes:
I don't know where MX gets hid info, but transport category are certificated to 3.3g max, 4.9g ultimate loading (standard category). I had the maneuvering limits in mind. With flaps retracted, for the 737, the positive limit is 2.5 Gs. -- Transpose mxsmanic and gmail to reach me by e-mail. |
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On 2 Jan 2007 05:56:31 -0800, "Jay Honeck" wrote:
I give up: What's a PIO? Pilot Induced Oscillation. It's usually something that happens during the landing flare, but can happen on a short-coupled aircraft in any phase of flight. I wasn't aware that a Bonanza was in that category, but apparently it is. It's more of a short coupled pilot that airplane.:-)) A lot of pilots get used to responses of a Cherokee or 172 and for some reason lean to rely on the VSI to stay level. That doesn't work in the Bo which is much quicker in response. Where as if they see the VSI showing a climb in the Cherokee and correct the Bo is quick enough they can end up 180 degrees out of phase which makes for an interesting ride. I usually start out by saying, "Remember, the VSI is a *trend* instrument". Isn't it bad for your aircraft to put it through 2 G stresses? The Deb is utility category when loaded properly. 2Gs. Loop entry in the G-III is or can be around 5.:-)) Or a little more if you want to do two with one on top of the other. Of course entry speed is a bit higher at 350 MPH. BTW one of the things I enjoyed out of 16R was seeing an old Ford Tri motor (think it was a Ford) doing a "low altitude" loop Planes are built to handle it. Roger Halstead (K8RI & ARRL life member) (N833R, S# CD-2 Worlds oldest Debonair) www.rogerhalstead.com |
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