Bullet

A bullet is a projectile propelled by a firearm, sling, slingshot, or air gun. Bullets do not normally contain explosives, but damage the intended target by impact and penetration. The word "bullet" is sometimes colloquially used to refer to ammunition in general, or to a cartridge, which is a combination of the bullet, case/shell, powder, and primer. This use of 'bullet', when 'cartridge' is intended, leads to confusion when the components of a cartridge are discussed or intended.

Bullets fired from slings, slingshots, and many airguns (including BB guns) travel well below the speed of sound (about 343 m/s or 1126 ft/s in dry air at 20 °C or 68 °F). Low-power handguns have muzzle velocities generally less than the speed of sound (subsonic), while bullets fired from high-power handguns (such as a .44 Magnum) and from rifles have an initial speed faster than the speed of sound, meaning they are supersonic and thus can travel a substantial distance and even hit a target before a nearby observer hears the "bang" of the shot. Bullet speed through air depends on a number of factors such as barometric pressure, humidity, air temperature, and wind speed.

Pressure vessel

A pressure vessel is a container designed to hold gases or liquids at a pressure substantially different from the ambient pressure.

The pressure differential is dangerous, and fatal accidents have occurred in the history of pressure vessel development and operation. Consequently, pressure vessel design, manufacture, and operation are regulated by engineering authorities backed by legislation. For these reasons, the definition of a pressure vessel varies from country to country, but involves parameters such as maximum safe operating pressure and temperature, and are engineered with a safety factor, corrosion allowance, minimum design temperature (for brittle fracture), and involve nondestructive testing, such as ultrasonic testing, radiography, and pressure tests, usually involving water, also known as a hydrotest, but could be pneumatically tested involving air or another gas. The preferred test is hydrostatic testing because it's a much safer method of testing as it releases much less energy if fracture were to occur (water does not rapidly increase its volume while rapid depressurization occurs, unlike gases like air, i.e. gasses fail explosively). In the United States, as with many other countries, it is the law that vessels over a certain size and pressure (15 PSIg) be built to Code, in the United States that Code is the ASME Boiler and Pressure Vessel Code (BPVC), these vessels also require an Authorized Inspector to sign off on every new vessel constructed and each vessel has a nameplate with pertinent information about the vessel such as maximum allowable working pressure, maximum temperature, minimum design metal temperature, what company manufactured it, the date, it's registration number (through the National Board), and ASME's official stamp for pressure vessels (U-stamp), making the vessel traceable and officially an ASME Code vessel.

Bullet (car)

Dreamt up by John Bettini, the first Bullet car prototype was built in 1996 utilising a Mazda MX-5 body. The chassis was designed and fabricated by Barry Pearson; it consisted of a square-tube spaceframe onto which a 13B rotary powerplant from a Mazda RX-7 was fitted.

Two more years of development saw a number of cars built; the first V8 was powered by a TVR crate engine supplied by the customer. Bettini decided a Lexus 4LT Quadcam would be a more desirable choice and the next production run saw four normally aspirated cars built and sold.

Sprintex, a supercharger company owned by Advanced Engine Components Ltd. (AEC) was commissioned to develop a supercharger system for the new "wide-body" model released in late 1999. AEC was so impressed with the supercharged Bullet SS that they purchased the Bullet company and set up a new manufacturing facility at Yatala in Queensland Australia.

AEC decided that the new Bullet Roadster and supercharged SS models should become fully Australian Design Rules (ADRs) compliant, and they invested heavily to achieve that end on 4 December 2002. All cars built from then on were classified as genuine production models and were priced at $98,000 for the Roadster and $118,000 for the SS.

Podcasts:

PLAYLIST TIME:
×