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' <>;
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:
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 On Behalf Of
Stephen Ambrose
Sent: Sunday, 11 October, 2020 12:34 PM
To: 'Chris Charles'; 'Chris Corben'; 'Chris Shaw'
Cc:
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:
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:
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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> --
>
> Chris Corben.
>
>
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