Lift on aircraft wing
Discussion
Putting this in very basic terms ,,and that there may well be plus and minus in the answers with regarding various wing shapes the question is
As i understand it the shape of a wing makes the air pressure passing over it less than the pressure under the wing. so if there is a figure of say 14 psi under the wing, what would be it above?
As i understand it the shape of a wing makes the air pressure passing over it less than the pressure under the wing. so if there is a figure of say 14 psi under the wing, what would be it above?
Still no treadmill...lol but it did help me formulate the question a bit better
what was trying to ask (hopefully) is this situation
There is say a Cessna 172 and is anchored down at its home base
A VERY strong wind picks up and if blowing along the length of the aircraft
the pressure under this Cessnas wing is still 14psi( or whatever it is called now , (i am very old school)
The pressure above the swing is less, therefore the wind ( pressure difference) can lift the aircraft off the ground with no forward momentum Substitute plane going forward at 80kts in still air is the same? as a wing blowing at 80kts over the wings of a stationary aircraft
Therefore in my addled mind wings are designed to have an area ,that when travelling forward, should have enough pressure difference (upward push) t the aircraft e.g hypothetical plane weighs say 2000lb pressure difference is, to make the maths easy, 0,5psi
If the sing area is more that 4000sqi in, on paper that is enough to keep it airborne or at least glide .without going down like a brick, assuming the pilot knows what he should be doing.
do fflaps, both leading edge and rear add anything to increasing the differential.
Having sat just behind the wing of a 747, there isnt much 'solid' material left on the wing, it seems all flap
Thst for being patient and all the answers
Does that make sense
what was trying to ask (hopefully) is this situation
There is say a Cessna 172 and is anchored down at its home base
A VERY strong wind picks up and if blowing along the length of the aircraft
the pressure under this Cessnas wing is still 14psi( or whatever it is called now , (i am very old school)
The pressure above the swing is less, therefore the wind ( pressure difference) can lift the aircraft off the ground with no forward momentum Substitute plane going forward at 80kts in still air is the same? as a wing blowing at 80kts over the wings of a stationary aircraft
Therefore in my addled mind wings are designed to have an area ,that when travelling forward, should have enough pressure difference (upward push) t the aircraft e.g hypothetical plane weighs say 2000lb pressure difference is, to make the maths easy, 0,5psi
If the sing area is more that 4000sqi in, on paper that is enough to keep it airborne or at least glide .without going down like a brick, assuming the pilot knows what he should be doing.
do fflaps, both leading edge and rear add anything to increasing the differential.
Having sat just behind the wing of a 747, there isnt much 'solid' material left on the wing, it seems all flap
Thst for being patient and all the answers
Does that make sense
couple of other questions not techy
The idiots view is that total psi under the wing minus total psi above the wing ,should be near to the weight of the aircraft giving assistance to it taking off
Looking at a couple of fighters ,the EE Lighting and the Lockheed F104 brought up this in my head
One the Lightning does the aerofoil shape keep parallel to the fuselage or keep at 90 degrees to the leading edge
Hope that makes sense
And how did the F104 manage with such small wings, bearing in mind the idiots guide above
I realise it was named to coffin maker, but i thought that was because the German airforce lost a lot of the type
The idiots view is that total psi under the wing minus total psi above the wing ,should be near to the weight of the aircraft giving assistance to it taking off
Looking at a couple of fighters ,the EE Lighting and the Lockheed F104 brought up this in my head
One the Lightning does the aerofoil shape keep parallel to the fuselage or keep at 90 degrees to the leading edge
Hope that makes sense
And how did the F104 manage with such small wings, bearing in mind the idiots guide above
I realise it was named to coffin maker, but i thought that was because the German airforce lost a lot of the type
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