Why build an Electromotive Force Projectile Accelerator (EFPA)? Electromotive Force Projectile Accelerators have the ability to accelerate without using any sort of propellant. In addition, EFPA’s can be built with no moving parts, an attribute that makes them highly reliable and silent instruments. The basic EFPA uses a voltage source and a combination of circuitry to accelerate an object to a desired speed. This is what makes EFPA a fairly unique device. An Electromotive Force Projectile Accelerator demonstrates many of basic concepts of magnetic machines. An EFPA is an example of an electromagnetic coil/solenoid. Such appear practically everywhere, from car door locks to doorbells and from diskette drive ejectors to fuel injectors. The only difference is that most solenoids limit the range of travel, and usually have a spring return. An EFPA is also an example of a simple linear motor.
What is the overall scope of work required for this project?
The basic theory of operation is as follows: voltage is applied to a coil (usually it is a multi layered coil), the current ramps up and a magnetic field is established in the coil. Once this magnetic field is established the projectile, which is made up of ferromagnetic (iron) material magnetizes and experiences a force towards the center of the electromagnetic coil (solenoid). A large current is forced through the coil, creating a magnetic field and attracting the ferromagnetic projectile. Capacitors are charged up over a few seconds, and then all of their electrical energy is released extremely fast. In an EFPA the energy is released into a coil of wire. This creates a powerful magnetic field which causes any ferromagnetic object in the coil to accelerate. When the projectile passes through the coil, the current is switched off and most of the magnetic field collapses, allowing the projectile to keep moving. Since the coil is wrapped around a thin wall of