27-01-2011

Colt 1911 Disassembly

The link below will guide you to a movie that shows how every part in the gun is connected. As you will see most parts rotate around pins that can easely be removed by pushing them out. The only screws are the ones who keeps the grip in place.

http://www.youtube.com/watch?v=SEBrkF0sMgI&feature=related

26-01-2011

Final presentation

Below you can find my final presentation. I made a movie of aproximatelly 9 and a half minutes to explain how handguns work. Details of how every part works you can find below in my blog.

24-01-2011

Myth : will a bulletimpact cause you to fly backwards?

We have all seen it in the movies, a bad guy gets shot and because of the impact of the bullet he flies backwards. Is this real or movie myth?
Well as a massive fan of Mythbusters I was very eager to find out. And I think they came up with a logical explanation why it is a movie myth. They tested this myth by shooting the biggest possible caliber they could find, which is the 50. Cal from Barret sniper rifle at a test dummie. They even made him wear a bulletproof vest so the kinetic energy of the bullet would transfer to the entire body instead of just piercing it.

As illustrated in the movie below they found that we had to Newton’s law into account. If the guy would fly back the shooter would have to fly back an equal distance. Every action has to have an equal yet opposite reaction.

Forces, pressure and speed

What I love about guns is the ability of making something small into something enormous. When we compare the force that is required to squeeze the trigger, which is around 14 Newton, to pressure behind the bullet when it ignites, which is 82,7 MPa, we can see that the initial force has been enlarged. I have to add that the final force on the primer of the bullet is 104 N. This force is caused by the push of the coil inside the grip. The exponential increase of pressure has almost no relation to the striking force on the primer. It is mainly the force of the explosion behind the bullet of the propellant due to the chemical reaction with the primer.
Because of the enormous pressure behind the bullet, the bullet will exit the muzzle with a speed of 330 meter per second, which is almost equal to the speed of sound (340,29 mps).