'did you see that?' ...no...not at all. o i love this show. also the cuts during the plane winding is the chefs kiss. for a moment i honestly thought we were about to watch the entire count. I hope Deane got a pre wound plane cuz that would drive me bonkers after a cpl takes.
As wind goes past the wing, on the top the air has a longer distance. This make the air spread out - a low pressure. On the bottom it is a straight line so the air stays the same, or a higher pressure then on top. That helps lift the plane, but the wing on an airplane is tilled. In a car, stick you hand out the window and hold it flat, then tilt the front up a bit and this will push your hand up. It is a combination of both that make airplanes fly. Propellers and blades on a helicopter are much the same as wings.
You would design a very inefficient plane Paul. An efficient plane wants the least angle of attack as possible (preferably zero) to minimise drag while producing lift.
Omg! SLOT CAR RACING! The old hobby shop by my childhood home used to have a slot car track! You could rent a car or bring your own. On Saturday they would have the racing club meet up and we would race all day, tweaking the cars between races. It was really affordable especially if you made your own. Shame there are no hobby shops for 100 miles nowadays.
6:35 that moment when you expect Michele Alboreto to be in this Ferrari because of how old the recording looks like but quickly realize, it's actually Jean Alesi. edit: Berger can, of course, be ruled out right away since he drove the 28 car.
Listening very carefully to your words, I see that you don't actually make the most common error in describing lift, but you dance quite close to it. I worried a little when you pulled out the cardboard. You managed to stay clear of the error when you say that its a "little bit like" the curve on the cardboard. I find this an acceptable simplification for the lower levels, where others may not. Also, it is ok that you didn't get into inverted flying and flat wings or sails. ... I do wonder, however, if you went inverted with the wing just to cause some questions about how some planes can fly inverted....? ... The most common incorrect statement is that the "Bernoulli Principle" states that fast moving air creates a lower pressure. If that is actually your understanding, then I recommend your team read some of the following authoritative sources. ... So many have made this error that it has taken on a life of its own because anyone searching is guaranteed to find all the poor explanations first. ... I do love your videos. -- 'Gday, Steve Science and Technical Advisor www.challengerillinois.org/ ................................ Peter Eastwell Bernoulli? www.scienceeducationreview.com/open_access/eastwell-bernoulli.pdf ... NASA Glenn Research Center: www.grc.nasa.gov/WWW/k-12/airplane/wrong1.html You should actually start on the previous GRC page: www.grc.nasa.gov/WWW/k-12/airplane/right2.html ... Video lecture explaining the Bernoulli Principle in relatin to a wing. If you understand Newton, you'll clearly understand Bernoiulli after this video. Dr Holger Babinsky, Cambridge University Engineering Department th-cam.com/video/XWdNEGr53Gw/w-d-xo.html His missing slides are HERE (Click the Download Icon for the complete set of slides): docs.google.com/file/d/0B0JABuFvb_G_MkpBZHJmRGo3UkU/edit?usp=sharing This is the 2003 article he mentions in the video: www3.eng.cam.ac.uk/outreach/Project-resources/Senior-glider/howwingswork.pdf The video is extracted from Cambridge University undergraduate prospectus 2006/2007 (so the video was done at about that time, or earlier. PLEASE NOTE than when Prof Babinski says "Coanda" he mispoke. Coanda is reserved only for high speed jets or sheets of air forced over a curved surface, NOT for air "normally" flowing around a wing. Lots of people debate whether this is, or is not Coanda... ... Weltner in PDF - "Misinterpretations of Bernoulli's Law": user.uni-frankfurt.de/~weltner/Misinterpretations%20of%20Bernoullis%20Law%202011%20internet.pdf Weltner as a web page: www-stud.rbi.informatik.uni-frankfurt.de/~plass/MIS/mis6.html Dave Bentley Wings Don't Suck 2015 219sqn.aafc.org.au/Flight/Wings%20don't%20suck-How%20planes%20really%20fly.pdf David Bentley Australian Air Force Cadets 2013: 219sqn.aafc.org.au/Flight/Principles%20of%20Flight%20-%20web.pdf Dave Bentley shows slowing of upper air & other misconceptions 2012: 219sqn.aafc.org.au/Flight/Simple%20Aerodynamics-How%20planes%20fly.pdf
"then I recommend your team read some of the following authoritative sources." You know this show is at least 28 years old, and probably closer to 35. The team didn't have the internet back then to review your references, and they're likely well past caring about them now.
Newton's Third Law was well known in the 80s... Physics was the same.... and it *is* important that the truth is included with such videos. It's good to learn from others' mistakes and build on that. That's how humanity progresses. When people continue to make the same mistakes, humanity regresses.
It has almost nothing to do with Bernoulli's principle! Wings don't need airfoil shapes at all - it's purely about Newton's Third Law - the air is deflected downwards by the wing's angle of attack (to which the curve contributes). This is easily demonstrated with a helicopter or even the propellor of an aircraft which are both examples of 'rotary wings'. It's quite clearly moving air downwards with the 'wing' (and helicopter) moving upwards. If your explanation of lift is correct, you should be able to stand under a helicopter and there would be no wind. Clearly that's nonsense. What is critical is the angle of attack which determines how much air is deflected in the opposite direction of the required lift. Airfoils are designed to minimise *drag* for a given angle of attack.
'did you see that?' ...no...not at all. o i love this show. also the cuts during the plane winding is the chefs kiss. for a moment i honestly thought we were about to watch the entire count. I hope Deane got a pre wound plane cuz that would drive me bonkers after a cpl takes.
Deane's outfit 🔥🔥🔥🔥
As wind goes past the wing, on the top the air has a longer distance. This make the air spread out - a low pressure. On the bottom it is a straight line so the air stays the same, or a higher pressure then on top.
That helps lift the plane, but the wing on an airplane is tilled.
In a car, stick you hand out the window and hold it flat, then tilt the front up a bit and this will push your hand up.
It is a combination of both that make airplanes fly.
Propellers and blades on a helicopter are much the same as wings.
You would design a very inefficient plane Paul. An efficient plane wants the least angle of attack as possible (preferably zero) to minimise drag while producing lift.
Omg! SLOT CAR RACING! The old hobby shop by my childhood home used to have a slot car track! You could rent a car or bring your own. On Saturday they would have the racing club meet up and we would race all day, tweaking the cars between races. It was really affordable especially if you made your own. Shame there are no hobby shops for 100 miles nowadays.
6:35 that moment when you expect Michele Alboreto to be in this Ferrari because of how old the recording looks like but quickly realize, it's actually Jean Alesi.
edit: Berger can, of course, be ruled out right away since he drove the 28 car.
The curvature of the wing is not essential for the lift at all.
+1993paule It is the curvature of the air flow that does the work. Flat wings have a curved flow as well.
Listening very carefully to your words, I see that you don't actually make the most common error in describing lift, but you dance quite close to it. I worried a little when you pulled out the cardboard. You managed to stay clear of the error when you say that its a "little bit like" the curve on the cardboard. I find this an acceptable simplification for the lower levels, where others may not.
Also, it is ok that you didn't get into inverted flying and flat wings or sails.
...
I do wonder, however, if you went inverted with the wing just to cause some questions about how some planes can fly inverted....?
...
The most common incorrect statement is that the "Bernoulli Principle" states that fast moving air creates a lower pressure. If that is actually your understanding, then I recommend your team read some of the following authoritative sources.
...
So many have made this error that it has taken on a life of its own because anyone searching is guaranteed to find all the poor explanations first.
...
I do love your videos.
--
'Gday, Steve
Science and Technical Advisor
www.challengerillinois.org/
................................
Peter Eastwell Bernoulli?
www.scienceeducationreview.com/open_access/eastwell-bernoulli.pdf
...
NASA Glenn Research Center:
www.grc.nasa.gov/WWW/k-12/airplane/wrong1.html
You should actually start on the previous GRC page:
www.grc.nasa.gov/WWW/k-12/airplane/right2.html
...
Video lecture explaining the Bernoulli Principle in relatin to a wing. If you understand Newton, you'll clearly understand Bernoiulli after this video.
Dr Holger Babinsky, Cambridge University Engineering Department
th-cam.com/video/XWdNEGr53Gw/w-d-xo.html
His missing slides are HERE (Click the Download Icon for the complete set of slides):
docs.google.com/file/d/0B0JABuFvb_G_MkpBZHJmRGo3UkU/edit?usp=sharing
This is the 2003 article he mentions in the video:
www3.eng.cam.ac.uk/outreach/Project-resources/Senior-glider/howwingswork.pdf
The video is extracted from Cambridge University undergraduate prospectus 2006/2007 (so the video was done at about that time, or earlier.
PLEASE NOTE than when Prof Babinski says "Coanda" he mispoke. Coanda is reserved only for high speed jets or sheets of air forced over a curved surface, NOT for air "normally" flowing around a wing. Lots of people debate whether this is, or is not Coanda...
...
Weltner in PDF - "Misinterpretations of Bernoulli's Law":
user.uni-frankfurt.de/~weltner/Misinterpretations%20of%20Bernoullis%20Law%202011%20internet.pdf
Weltner as a web page:
www-stud.rbi.informatik.uni-frankfurt.de/~plass/MIS/mis6.html
Dave Bentley Wings Don't Suck 2015
219sqn.aafc.org.au/Flight/Wings%20don't%20suck-How%20planes%20really%20fly.pdf
David Bentley Australian Air Force Cadets 2013:
219sqn.aafc.org.au/Flight/Principles%20of%20Flight%20-%20web.pdf
Dave Bentley shows slowing of upper air & other misconceptions 2012:
219sqn.aafc.org.au/Flight/Simple%20Aerodynamics-How%20planes%20fly.pdf
Jesus.
damn your description is more than the Channels video by the way great info...r u an aeospace enginer...
"then I recommend your team read some of the following authoritative sources."
You know this show is at least 28 years old, and probably closer to 35. The team didn't have the internet back then to review your references, and they're likely well past caring about them now.
Newton's Third Law was well known in the 80s... Physics was the same.... and it *is* important that the truth is included with such videos. It's good to learn from others' mistakes and build on that. That's how humanity progresses. When people continue to make the same mistakes, humanity regresses.
It has almost nothing to do with Bernoulli's principle! Wings don't need airfoil shapes at all - it's purely about Newton's Third Law - the air is deflected downwards by the wing's angle of attack (to which the curve contributes). This is easily demonstrated with a helicopter or even the propellor of an aircraft which are both examples of 'rotary wings'. It's quite clearly moving air downwards with the 'wing' (and helicopter) moving upwards. If your explanation of lift is correct, you should be able to stand under a helicopter and there would be no wind. Clearly that's nonsense.
What is critical is the angle of attack which determines how much air is deflected in the opposite direction of the required lift. Airfoils are designed to minimise *drag* for a given angle of attack.