How Lift Generates for Drone through Propeller

Physics of Drone
Lift is upward aerodynamic force generated due to rotating aerfoil shape of propellers
It is a result many factors
Principally 
1.Bernoulli theorem - as the velocity of fluid / air increases , pressue inside it decreases. In a stream lined flow , pressure reamins constant which static + dynamic = constant.

2.Law of Continuity - in steady flow , mass flow rate remains constant 
A1V1 = A2V2
When area reduces velocity increases and when area increases velocity decreases
Now when aerdynamic shape is formed in propeller it is raised on one side which is like reducing area of streamlined tube.
So law of continuity tells why velocity increases and bernoulli tells wen velocity increases pressure deceases

3.Newton's 3rd Law of motion - propellers / wings deflect air downwards due to angle of attack, thie deflection downwards created an equal opposite force upwards 
Which generates Lift

Lift is further dependent on Air density, higher density higher lift, sp easier to fly drone on planes than in high altitude, velocity doubles , lift quadruples
Coefficient of Lift - lift increase ok increasing angle of attack till critical angle of attack beyong which it stalls
Surface area of propeller / wing - when air is pushed upwards,mire surface areain contact with air produces more lift, that why large propellers gives more thrust in small, medium drone
L = 1/2 Rho V2 cL S
And the decrease in pressure is static pressure, increase i relative velocity increases dynamic pressure

Weight itself is due to gravity, explainedby Newton's 2nd law of motion
F = ma / F = mg2

Thrust and drag are best explained by Newton's first law of motion - an object is at rest unless given external force - thrust , force applied by engine / motors 
Drag is friction of air - object moving can be stopped by external force
When thrust = drag , drone keep moving at constant speed witjout acceleration 
This is Physics of Drone - copyrights Sumit Kumar / Spectracore Technologies