it all works on the principle of newton's third law of motion, A force has an action force and a reaction force opposite to action force but the same magnitude.
What happens is that, Jet engines have huge engines on their wings, which has a huge fan in-front of it which sucks air at a enormous rate. Inside the engine fuel is burnt and mixed with air and released from the back, which is a narrow nozzle producing thrust.
the light one
Viscosity is how slowly a fluid will move or pour at specified temperature. Specific Gravity is how heavy it is in relation to its volume.
Yes, friction can be involved, as one of the forces. For example, if I push against this heavy desk in front of mine with a force of 100N, and it doesn't budge, that means there is a contrary force of 100N. That force, of course, is friction.
There is a reason birds fly and pigs do not. Birds have hollow bones and are light. The lift of the wings can support their light weight. Pigs have heavy bones and do not have the strength to either jump or lift in their appendages to support their weight. In airplanes, a heavy airplane, C130, must have more lift in the wings than a light airplane.
Inclined Planes allow heavy objects to be moved up or down using less effort over a greater distance.
low gear ratios
1,000,000,000,000,000,000
Airplanes need a lot of speed to take off because they are not designed for vertical takeoff and are to heavy to do so.
a plane that is well armored and fast and that can hold heavy weights
Because a plane is heavy enough to crush you, gravity dose'nt just forget about planes.
Just any heavy duty brake fluid will do, even regular brake fluid is fine, but I prefer the heavy duty grade. Dot 3 or Dot 4 brake fluid.
friction forces
Iron isn't used that often in airplanes because it isextremely heavy, and brittle. Not to mention expensive.
they also were the target of heavy destruction by the Allied forces
Yes. Tornadoes have hit airports. When this happens it often results in heavy damage to airplanes.
The US forces in the Ardennes.
Because they would then be incredibly heavy. Please read "Airframe" by Michael Crichton.