How Airplanes Fly: A Physical Description of Lift (1999)

Re:How Airplanes Fly: A Physical Description of Lift (1999) by Gravityloss on Thursday December 10, 2015 @07:17PM (#10714639)

Your definition of lift is very different from the commonly accepted one.

If an aircraft that weighs 1000 kg flies level, then the lift has to be 9800 newtons.

That means the lift is the sum of the effect from both the bottom overpressure and the top underpressure.

You can check it from any dictionary.

https://en.wikipedia.org/wiki/Lift_%28force%29

[ Parent | on HN ]

Re:How Airplanes Fly: A Physical Description of Lift (1999) by Retric on Thursday December 10, 2015 @08:55PM (#10715037)

In level flight every actual force vector above the wing is lowering the magnatude of lift.

If you owe 2000$ and have 2200$ your net worth is positive 200$. But, people don't talk about debt as adding to your net worth even if it's part of the equation debt is reducing the result not increasing it.

PS: I agree you don't need to model the 2.1 tons per square foot of force in most situations. But, just because you ignore something does not mean it goes away.

[ Parent | on HN ]