Ion Thruster is a thrusting mechanism which is alternative to chemical propulsion used today.
This propulsion uses Lorentz force to accelerate ions.
It can be used for a huge number of purposes. Accelerating ions can provide thrust for a spaceship or satellite.
This technology is better than chemical propulsion in some ways. But, there are some limitations as well.
Once those limitations are overcome, such a rocket can be very well feasible.
Railgun is something we know from video games. Railgun was dreamed as a gun that can fire the bullet at much higher speed than a normal gun. U.S. Navy has actually turned that into reality.
They have made and tested a giant railgun capable of thwarting a bullet/slug at mach 7, i.e. 7 times the speed of sound in air.
The railgun surely creates a powerful sonic boom. With this speed, the gun gives the side strategic advantage in almost any land war and even in air or sea war.
A Helicopter crashed in london . It crashed with a tall crane on a foggy morning . 2 people were killed in this crash.
The crash awakenes us to the need for ,
- Better and more penetrating fog lights.
- A better way to detect possible collision and avert it either manually or electronically.