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## Flight Theory - It's An Unsolved Science Dilemma

 To: Stephen Ambrose <>, 'Philip Veerman' <>, "" <> Flight Theory - It's An Unsolved Science Dilemma Chris Brandis <> Sun, 11 Oct 2020 06:58:45 +0000
 ```Hi My understanding is that the air is stationary and the wing is moving forward. As it moves forward the air is moved up from the front creating a low pressure zone above the wing. The higher pressure air above this zone will flow into the low pressure zone but this takes time and as it flows the wing moves forward creating another, continuous, low pressure zone. So if the speed forward is fast enough the wing will always have a low pressure zone above it. If fast enough the wing only needs to be narrow, swifts, as the air flow will never have time to reduce the low pressure zone but if slower the wing needs to be broader, eagles, to maximise the amount of low pressure zone before the air can flow in to neutralise it. The low pressure creates the lift whether from the aerofoil or the attack angle. Cheers Chris -----Original Message----- From: Birding-Aus On Behalf Of Stephen Ambrose Sent: Sunday, 11 October 2020 4:21 PM To: 'Philip Veerman' ; m("birding-aus.org","Birding-Aus"); Subject: Re: [Birding-Aus] Flight Theory - It's An Unsolved Science Dilemma Philip, I think you may be missing the point here. It's clear that air flows faster over the top of a curved wing than below and this creates lift. Hence, planes are designed to allow that to happen and allow them to fly. The unresolved question is why, precisely, the air flows faster over the top of the wing than underneath it. Bernoulli's Theorem and Newton's Third Law of Physics where applied to aerodynamics from the early 20th Century onwards and explain most, but not all, the reasons for this difference in air velocity. The Scientific American article summarises how computational fluid dynamics are refining (not replacing) our understanding of lift by suggesting the possible role of additional factors. Stephen Ambrose Ryde NSW -----Original Message----- From: Birding-Aus On Behalf Of Philip Veerman Sent: 11 October 2020 2:08 PM To: m("birding-aus.org","Birding-Aus"); Subject: Re: [Birding-Aus] Flight Theory - It's An Unsolved Science Dilemma Amazing how much chat this generates. Science generally requires an idea or question based on observation (e.g. from birds flying), from which we generate a hypothesis, it is then tested (typically by experiment). I suggest the number of successful plane flights generates more than sufficient testing of the hypothesis and thus explaining why. Philip -----Original Message----- From: Birding-Aus m("birding-aus.org]","[birding-aus-bounces"); On Behalf Of Stephen Ambrose Sent: Sunday, 11 October, 2020 12:34 PM To: 'Chris Charles'; 'Chris Corben'; 'Chris Shaw' Cc: m("birding-aus.org","Birding-Aus"); Subject: Re: [Birding-Aus] Flight Theory - It's An Unsolved Science Dilemma Chris Charles, I think Chris Shaw may have seen this article in the Scientific American. https://www.scientificamerican.com/article/no-one-can-explain-why-planes-stay-in-the-air/ The title of the article is probably a bit overstated. No one disagrees about the physical features and air movement required to provide lift, just the mathematics that explains it. Stephen Ambrose Ryde NSW -----Original Message----- From: Birding-Aus On Behalf Of Chris Charles Sent: 9 October 2020 9:03 AM To: Chris Corben Cc: m("birding-aus.org","Birding-Aus"); Subject: Re: [Birding-Aus] Flight Theory - It's An Unsolved Science Dilemma Chris, Excitedly anticipating my next flight. There is always some aspect that warrants more research but what is the reference for your nervousness? Chris Charles www.licole.com.au m("licole","//unsplash.com/");">https:m("licole","//unsplash.com/"); Sent from my iPhone > On 9 Oct 2020, at 4:05 am, Chris Corben via Birding-Aus > wrote: > > ﻿What!? > > A brick can produce lift if you use it the right way. Where is the mystery? > > Cheers, Chris. > > >> On 10/8/2020 2:26 AM, Chris Shaw via Birding-Aus wrote: >> Believe it or not there is no scientifically verifiable explanation of why >> wings produce lift and the smaller the critter the more baffling it becomes. >> I love watching pelicans fly. They don't know the theory of flight has gone >> west. Both main theories that have been around for years have problems and >> there is yet still no definitive answer, so be careful getting on the next >> aeroplane. >> >> My pelicans can be seen on >> >> https://www.ararelitus.com/birds-1 >>
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 Current Thread Flight Theory - It's An Unsolved Science Dilemma, Chris Shaw via Birding-Aus Flight Theory - It's An Unsolved Science Dilemma, Chris Corben via Birding-Aus Flight Theory - It's An Unsolved Science Dilemma, Tony Russell Flight Theory - It's An Unsolved Science Dilemma, Tony Ashton Flight Theory - It's An Unsolved Science Dilemma, Chris Charles Flight Theory - It's An Unsolved Science Dilemma, Chris Charles Flight Theory - It's An Unsolved Science Dilemma, Chris Corben via Birding-Aus Flight Theory - It's An Unsolved Science Dilemma, Stephen Ambrose Flight Theory - It's An Unsolved Science Dilemma, Philip Veerman Flight Theory - It's An Unsolved Science Dilemma, Stephen Ambrose Flight Theory - It's An Unsolved Science Dilemma, Chris Brandis <= Flight Theory - It's An Unsolved Science Dilemma, Jason Polak via Birding-Aus Flight Theory - It's An Unsolved Science Dilemma, Chris Charles Flight Theory - It's An Unsolved Science Dilemma, Jason Polak Flight Theory - It's An Unsolved Science Dilemma, Michael Tarburton Flight Theory - It's An Unsolved Science Dilemma, calyptorhynchus Flight Theory - It's An Unsolved Science Dilemma, Stephen Ambrose