Showing posts with label aerodynamics. Show all posts
Showing posts with label aerodynamics. Show all posts

Tuesday, January 9, 2018

When legends meet: Laplace and Napoleon

Pierre-Simon Laplace
(1749-1829)
Picture 1


When the mathematician Pierre-Simon Laplace and Napoleon Bonaparte met the Emperor of France said, that there were no mentions of the god in Laplace’s papers. And the scientist answered that he didn’t need that calculation. I think that Napoleon was not interested in the god or mathematics when he met Laplace. The thing what interested this man, who became the figure of excellent tactician and military leader was something that was drawn in the papers of Laplace.



That thing was the points, what were drawn on those papers, and the way how Laplace could calculate them in the paper. If Simon Laplace could do the same thing for the artillery, French army will have the most lethal cannons on the battlefield. For many people, those points on the paper were nothing more than just the points. But as we must see, Napoleon saw those things by the different way, he saw a very effective way to use artillery.


Those calculations what made the finding of planet Neptune possible were known as the mechanics of heaven. The idea of the celestial mechanics was that Universum is a very stable place, where all particles move stable trajectories. This made possible that the movements of the particles can be calculated very sharply

The planets are found near the ballistical area of the sky, what is called as elliptical, and there is possible to calculate the point, where the planet will be fine with very good sharpness. Problem with the celestial mechanics is that will work only in the universe, there is no wind to disturb the planets, and if the conditions are the same kind in the Earth atmosphere than they are in the empty space, we could calculate every flight trajectory same way, what the astronomers used to calculate the points of Neptune.





 The thing is actually possible on the Earth if those calculations were involved more values, what will help in that calculation. First one is the side wind or the position where the wind comes, the second one is the temperature, the third one is the air pressure, fourth value is the humidity because the air what has particles will cause the changing of the ballistic situations. The sharpness of those calculations depends on how many vectors and values quantities could the mathematician involve the formula, what calculates the point, where the ballistic form ends, and those things were interested in Napoleon, who wanted to take the control all the Europe.



Sources:



Picture 1



https://en.wikipedia.org/wiki/Pierre-Simon_Laplace


Wednesday, December 6, 2017

The thought about aerodynamics and jet planes


B-1 Lancer
(USAF)

Kimmo Huosionmaa

This is the writing about the B-1 “Lancer” and some strange thing about the aviation of the United States Air Force. When we are reading the books of the aerodynamics, we always face the mysterious world “side relationship”. This world means that what kind of capacities the airplane has depends on the relationship of the wing area the length and form of the wing and the body of the airplane, and that´s the reason why some airplanes have so-called “sweep wings” what means that the wing of the airplane will turn backwards, when airplane increases the speed.


The “flying wing” formation has the best relationship cargo and operational range. But when we are talking about the aviation, we can make the many size airplanes with same drawings, and if somebody says, that there is needed more powerful engines, we can simply put more turbojets inside that aircraft body, if we want to make the bigger airplane. But when we want to make the smaller airplane, we can just make smaller body and wings, and also change smaller parts for the hydraulic systems.


So the question of the B-1 bomber is that same body and drawings are suitable for the fast tactical aircraft, what is useful for the same missions, what are reserved for F-22 and another tactical airplane. This aircraft can have the same kind of canopy than other tactical aircraft, but the modern ultra-fast airplane does not need the canopy or windows. The pilot can use the virtual reality for making the observations from the space around the plane.


In this scenario, the surface of the aircraft if full of tiny cameras and other sensors, what will give the pilot 360 degrees observation area, and the computer system can zoom the targets what will not give the positive IFF (Identification Friend or Foe) signal. Also, those virtual systems can be given only the information, what the pilot needs. But when the system faces the EMP-system, will those high-tech systems can be removed in seconds if the pilot needs analogical meters. So those virtualization systems can be fitted to the helmet of the pilot, and if the system fails, will the transfer to analogical systems happen only to cut off the electricity from the virtual mask. And the canopy will just change to the lucid form if the electricity of the system will cut.

New autonomous task units are entering service.

"The deal will create much-needed competition for the Department of War acquisition process. (Representational image)" (Interestin...