General expression of wind force on a sail....

• I
• fog37
vinnie78
I believe your trying to understand lift in aviation better.

I will try to explain the principle.
So the wing design causes the wind flow to move over the top of the wing at a faster rate. Compared to the flow of air under the wing. The increased speed causes an are of lower pressure above the wing. Not being a closed system like in hydraulics this is the case. The reaction is the same as when you draw on a straw. You lower the ambient air pressure inside the straw. The greater ambient air pressure on the remaining fluid being greater. The fluid is pushed up into the straw for you to drink. With a wing the same effect is expressed. Lower pressure above the aircraft raises up and achieves lift.

If the lift value is greater than gravitational weight of the object.

Mentor
I will try to explain the principle.
So the wing design causes the wind flow to move over the top of the wing at a faster rate. Compared to the flow of air under the wing. The increased speed causes an are of lower pressure above the wing. Not being a closed system like in hydraulics this is the case. The reaction is the same as when you draw on a straw. You lower the ambient air pressure inside the straw. The greater ambient air pressure on the remaining fluid being greater. The fluid is pushed up into the straw for you to drink. With a wing the same effect is expressed. Lower pressure above the aircraft raises up and achieves lift.

https://www.physicsforums.com/insights/airplane-wing-work-primer-lift/

vinnie78

Air density changes a wings lift value. I fly in colder more dense air, I get better lift and max elevation from my aircraft. Hotter less dense air, I get less lift and a lower max elevation. Overcoming oxygen requirements, should I fly in different environments such as another planet. Density of air will change my lift. The atomic weight of mass may change due to gravitational differences requiring more lift overall.

With hydrofoil lift.
A positive nose down attitude from rear wing just behind center of gravity is best. Rear wing carrying most of the weight. The forward wing will require a drastic angle of attack increase to counter act expected Stern over Bow effect.

Mentor

Mentor
My point was that how a wing produces lift is fairly complicated, and has been discussed at length here at PF. By giving you that reference I wanted to be sure that you had good information to go on in the future.

After some Moderation chores, the thread is reopened.

fog37 and hutchphd