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#21
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Why Airplanes Fly - Voids Above A Planar Sheet
On Oct 4, 10:27 am, Le Chaud Lapin wrote:
The cigarettes would be lit so that stream of smoke floats upward. Can cigarettes be lit so that the smoke flows downward? If flat pressure sensors were mounted below the wing, close to the trailing edge, they would show a momentary increase in pressure. We've been told for years by people who do wind-tunnel experiments that the pressure on the bottom is not increased. Again, it's not intuitive. We're feeling drag, not an increase in pressure. If we hold a funnel (a version of a converging duct) with the big end to the wind, we'll find accelerating airflow in it, decreasing pressure, decreasing temperature, and drag that makes us think that the pressure in it is increasing. The air below is moving downward, something that could be measured by an airspeed indicator, but that doesn't mean pressure is increased. It means that the air has dynamic pressure now because it's moving, and if it's moving its static pressure has decreased. Better get building this thing. Get back to us as to the pressure readings under the wing. Dan Dan |
#22
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Why Airplanes Fly - Voids Above A Planar Sheet
On Oct 4, 4:46 pm, "Gatt" wrote:
What you should imagine are pilots who risk their lives countless times between wings that are proven to work being told to do experiments by somebody who challenges proven technology and expects everybody to do experiments just to indulge your accusation that basically everything they know about aerodynamics is wrong. Not true. I do not recall any "accusation that basically everything they know about aerodynamics is wrong." I wrote that there are some things in the Jeppensen book that are just plain wrong, as is the explanation of action/reaction with regard to downwash. It's sort of like an IT guy telling Marines how to fight a war. Probably not going to get you invited to the NCO's club. What has IT got to do with a war? My writings were very specific, involving aerodynamics. Don't take it personally. It just is. If you were the first person to come in here and do it they'd probably go easier, but, alas, you're not. Things would go a lot easier if people would focus on the physics and ease up on the ad hominem attacks. If you have questions about aerodynamic science, perhaps you should first ask those who use it on a regular basis rather than coming in an suggesting their understanding of their area of expertise is deficient. Or AT least let people know you're a pilot, builder or aerodynamics professional. I did. The answer was "yes, the book is right, and you are wrong." -Le Chaud Lapin- |
#23
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Why Airplanes Fly - Voids Above A Planar Sheet
"Le Chaud Lapin" wrote in message oups.com... On Oct 4, 4:46 pm, "Gatt" wrote: expects everybody to do experiments just to indulge your accusation that basically everything they know about aerodynamics is wrong. Not true. I do not recall any "accusation that basically everything they know about aerodynamics is wrong." I wrote that there are some things in the Jeppensen book that are just plain wrong, as is the explanation of action/reaction with regard to downwash. Oh, nevermind, everybody. It's the same guy with a new handle. It's Jeppesen, and, do you have any idea how many people are successfully flying with what they learned from the Jeppesen books? Are you one of them? What has IT got to do with a war? My writings were very specific, involving aerodynamics. What I'm saying is, until you prove your aerodynamics with something more than two sheets of paper, nobody gives a damn. Here's a hint: We don't fly sheets of paper or plywood. If you think it can be done, all you have to do is build an airplane and demonstrate it. I did. The answer was "yes, the book is right, and you are wrong." Accept it and move on. Don't just change your handle and try again. -c |
#24
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Why Airplanes Fly - Voids Above A Planar Sheet
On Oct 4, 5:20 pm, "Gatt" wrote:
"Le Chaud Lapin" wrote in ooglegroups.com... Oh, nevermind, everybody. It's the same guy with a new handle. It's My handle has been the same for over a decade. Jeppesen, and, do you have any idea how many people are successfully flying with what they learned from the Jeppesen books? Are you one of them? Not yet. I will continue to study my Jeppesen book. That does not mean that I will blindly accept everything I read. What has IT got to do with a war? My writings were very specific, involving aerodynamics. What I'm saying is, until you prove your aerodynamics with something more than two sheets of paper, nobody gives a damn. Here's a hint: We don't fly sheets of paper or plywood. If you think it can be done, all you have to do is build an airplane and demonstrate it. I did. The answer was "yes, the book is right, and you are wrong." Accept it and move on. Don't just change your handle and try again. My handle has been the same for over a decade. And I will do as I please, thanks. -Le Chaud Lapin- |
#25
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Why Airplanes Fly - Voids Above A Planar Sheet
Bertie the Bunyip wrote:
Le Chaud Lapin wrote in ups.com: Hi, The title of this post implies that I know why airplanes fly. I don't, not completely at least. But I do know that I have read a lot of "official" explanations that are just plain wrong. Before I begin my exposition about what keeps the plane afloat, I would like anyone who care to participate in this discussion to do a couple of simple experiments. Good grief.. .... Charlie Brown. |
#26
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Why Airplanes Fly - Voids Above A Planar Sheet
Dudley Henriques wrote:
Le Chaud Lapin wrote: On Oct 4, 12:48 pm, "Robert M. Gary" wrote: On Oct 3, 7:04 pm, Le Chaud Lapin wrote: The title of this post implies that I know why airplanes fly. I don't, not completely at least. But I do know that I have read a lot of "official" explanations that are just plain wrong. Or just buy the book "Aerodynamics for Naval Aviators" and look at the pictures. -Robert What will I see? -Le Chaud Lapin- What will I see???? The collective knowledge of the finest aerodynamics minds since the dawn of aviation. ANA is the "bible" for anyone from Astronauts to Student Pilots. It's not written for the casual user however. Can us nonNaval aviators still read it? :-) Matt |
#27
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Why Airplanes Fly - Voids Above A Planar Sheet
Matt Whiting wrote:
Dudley Henriques wrote: Le Chaud Lapin wrote: On Oct 4, 12:48 pm, "Robert M. Gary" wrote: On Oct 3, 7:04 pm, Le Chaud Lapin wrote: The title of this post implies that I know why airplanes fly. I don't, not completely at least. But I do know that I have read a lot of "official" explanations that are just plain wrong. Or just buy the book "Aerodynamics for Naval Aviators" and look at the pictures. -Robert What will I see? -Le Chaud Lapin- What will I see???? The collective knowledge of the finest aerodynamics minds since the dawn of aviation. ANA is the "bible" for anyone from Astronauts to Student Pilots. It's not written for the casual user however. Can us nonNaval aviators still read it? :-) Matt Absolutely! Accurate information is accurate information to all.....well, ALMOST all anyway!! :-)) -- Dudley Henriques |
#28
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Why Airplanes Fly - Voids Above A Planar Sheet
Le Chaud Lapin wrote: On Oct 4, 4:46 pm, "Gatt" wrote: What you should imagine are pilots who risk their lives countless times between wings that are proven to work being told to do experiments by somebody who challenges proven technology and expects everybody to do experiments just to indulge your accusation that basically everything they know about aerodynamics is wrong. Not true. I do not recall any "accusation that basically everything they know about aerodynamics is wrong." I wrote that there are some things in the Jeppensen book that are just plain wrong, as is the explanation of action/reaction with regard to downwash. It's sort of like an IT guy telling Marines how to fight a war. Probably not going to get you invited to the NCO's club. What has IT got to do with a war? My writings were very specific, involving aerodynamics. Don't take it personally. It just is. If you were the first person to come in here and do it they'd probably go easier, but, alas, you're not. Things would go a lot easier if people would focus on the physics and ease up on the ad hominem attacks. If you have questions about aerodynamic science, perhaps you should first ask those who use it on a regular basis rather than coming in an suggesting their understanding of their area of expertise is deficient. Or AT least let people know you're a pilot, builder or aerodynamics professional. I did. The answer was "yes, the book is right, and you are wrong." Teh book is right. Bertie |
#29
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Why Airplanes Fly - Voids Above A Planar Sheet
"Le Chaud Lapin" wrote in message
ups.com... Hi, The title of this post implies that I know why airplanes fly. I don't, not completely at least. But I do know that I have read a lot of "official" explanations that are just plain wrong. If one does not know the correct answer, how can one even suggest that a proposed answer is in fact wrong? Crash Lander -- Straight and Level Down Under. http://www.straightandleveldownunder.net/ |
#30
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Why Airplanes Fly - Voids Above A Planar Sheet
Crash Lander wrote:
"Le Chaud Lapin" wrote in message ups.com... Hi, The title of this post implies that I know why airplanes fly. I don't, not completely at least. But I do know that I have read a lot of "official" explanations that are just plain wrong. If one does not know the correct answer, how can one even suggest that a proposed answer is in fact wrong? Crash Lander Hold on a minute. My wife will know this one!!!! :-) -- Dudley Henriques |
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