Fire engine

A fire engine (also known in some places as a fire truck or fire lorry) is a road vehicle (usually a truck) that functions as a firefighting apparatus. The primary purposes of a fire engine include transporting firefighters and water to an incident as well as carrying equipment for firefighting operations. Some fire engines have specialized functions, such as wildfire suppression and aircraft rescue and firefighting, and may also carry equipment for technical rescue.

Many fire engines are based on commercial vehicle chassis that are further upgraded and customised for firefighting requirements. They are normally fitted with sirens and emergency vehicle lighting, as well as communication equipment such as two-way radios and mobile computer technology.

The terms ''fire engine'' and ''fire truck'' are often used interchangeably to a broad range of vehicles involved in firefighting; however, in some fire departments they refer to separate and specific types of vehicle.

Design and construction

The design and construction of fire engines focuses greatly on the use of both active and passive warnings. Passive visual warnings involve the use of high contrast patterns to increase the noticeability of the vehicle. These types of warnings are often seen on older vehicles and those in developing countries. More modern designs make use of retroreflectors to reflect light from other vehicles. Vehicles will also often have these reflectors arranged in a chevron pattern along with the words ''fire'' or ''rescue''. European countries commonly use a pattern known as battenburg markings. Along with the passive warnings, are active visual warnings which are usually in the form of flashing colored lights (also known as " beacons" or " lightbars"). These flash to attract the attention of other drivers as the fire truck approaches, or to provide warning to drivers approaching a parked fire truck in a dangerous position on the road. While the fire truck is headed towards the scene, the lights are always accompanied by loud audible warnings such as sirens and air horns. Some fire engines in the United States are lime yellow rather than red due to safety and ergonomics reasons. A 2009 study by the U.S. Fire Administration concluded that fluorescent colors, including yellow-green and orange, are easiest to spot in daylight.

Although the exact origin of the firetruck's color is not entirely known, jokes regarding the origin have been passed around. One such is this. "Fire engines are red because they have eight wheels and four people on them, and four plus eight makes twelve, and there are twelve inches in a foot, and one foot is a ruler, and Queen Elizabeth was a ruler, and Queen Elizabeth was also a ship, and the ship sailed the seas, and there were fish in the seas, and fish have fins, and the Finns fought the Russians, and the Russians are red, and fire trucks are always “Russian" around, so that's why fire trucks are red!"

In some regions, a fire engine may be used to transport first responder firefighters, paramedics or EMTs to medical emergencies due to their proximity to the incident.

Types

Conventional fire engine

The standard fire engine transports firefighters to the scene, carries equipment needed by the firefighters for most firefighting scenarios, and may provide a limited supply of water with which to fight the fire. The tools carried on the fire engine will vary greatly based on many factors including the size of the department and the usual situations the firefighters handle. For example, departments located near large bodies of water or rivers are likely to have some sort of water rescue equipment. Standard tools found on nearly all fire engines include ladders, hydraulic rescue tools (often referred to as the jaws of life), floodlights, fire hose, fire extinguishers, self-contained breathing apparatus, and thermal imaging cameras.

The exact layout of what is carried on an engine is decided by the needs of the department. For example, fire departments located in metropolitan areas will carry equipment to mitigate hazardous materials and effect technical rescues, while departments that operate in the wildland-urban interface will need the gear to deal with brush fires.

Some fire engines have a fixed deluge gun, also known as a master stream, which directs a heavy stream of water to wherever the operator points it. An additional feature of engines are their preconnected hose lines, commonly referred to as ''preconnects''. The preconnects are attached to the engine's onboard water supply and allow firefighters to quickly mount an aggressive attack on the fire as soon as they arrive on scene. When the onboard water supply runs out, the engine is connected to more permanent sources such as fire hydrants or water tenders and can also use natural sources such as rivers or reservoirs by drafting water.

Aerial apparatus

An aerial apparatus is a fire truck mounted with an extendable boom that enables firefighters to reach high locations. They can provide a high vantage point for spraying water and creating ventilation, an access route for firefighters and an escape route for firefighters and people they have rescued. In North America, aerial apparatuses are used for fire suppression, whereas in Europe, they are used more for rescue.

Turntable ladder

A turntable ladder (TL) is an aerial apparatus with a large ladder mounted on a pivot which resembles a turntable, giving it its name. The key functions of a turntable ladder are allowing access or egress of firefighters and fire victims at height, providing a high-level water point for firefighting (elevated master stream), and providing a platform from which tasks such as ventilation or overhaul can be executed.

To increase its length and reach, the ladder is often telescoping. Modern telescopic ladders may be hydraulic or pneumatic. These mechanical features allow the use of ladders which are longer, sturdier, and more stable. They may also have pre-attached hoses or other equipment.

The pivot can be mounted at the rear of the chassis or in the middle, just behind the cab. The latter is sometimes called a "mid-ship" arrangement, and it allows a lower travel height for the truck.

While the traditional characteristic of a TL was a lack of water pumping or storage, many modern TLs have a water pumping function built in (and some have their own on-board supply reservoir). Some may have piping along the ladder to supply water to firefighters at the top of the ladder, and some of these may also have a monitor installed at the top. Other appliances may simply have a track-way to securely hold a manually-run hose reel.

In the United States, turntable ladders with additional functions such as an onboard pump, a water tank, fire hose, aerial ladder and multiple ground ladders, are known as quad or quint engines, indicating the number of functions they perform.

The highest TL in the world is the Magirus M68L, with a range of .

Tiller truck

In the United States, a tiller truck, also known as a tractor-drawn aerial, tiller ladder, or hook-and-ladder truck, is a specialized turntable ladder mounted on a semi-trailer truck. Unlike a commercial semi, the trailer and tractor are permanently combined and special tools are required to separate them. It has two drivers, with separate steering wheels for front and rear wheels.

One of the main features of the tiller-truck is its enhanced maneuverability. The independent steering of the front and back wheels allow the tiller to make much sharper turns, which is particularly helpful on narrow streets and in apartment complexes with maze-like roads. An additional feature of the tiller-truck is that its overall length, over for most models, allows for additional storage of tools and equipment. The extreme length gives compartment capacities that range between in the trailer with an additional in the cab.

Some departments elect to use tiller- quints, which are tiller trucks that have the added feature of being fitted with an on-board water tank. These are particularly useful for smaller departments that do not have enough personnel to staff both an engine company and a truck company.

Platform truck

A platform truck carries an aerial work platform, also known as a basket or bucket, on the end of a ladder or boom. These platforms can provide a secure place from which a firefighter can operate. Many platforms also allow for rescues to be performed and are outfitted with tie down clips and rappelling arms.

Some booms are capable of articulating, allowing the arm to bend in one or more places. This allows the platform truck to go "up and over" an obstacle, and is an advantage over the traditional platform ladder, which can only extend in a straight line.

Wildland fire engine

A wildland fire engine is a specialised fire engine that can negotiate difficult terrain for wildfire suppression. A wildland fire engine is smaller than standard fire engines and has a higher ground clearance. They may also respond to emergencies in rough terrain where other vehicles cannot respond. Many wildland engines feature four-wheel drive capability to improve hill climbing and rough terrain capability. Some wildland apparatus can pump water while driving (compared to some traditional engines which must be stationary to pump water), allowing "mobile attacks" on vegetation fires to minimize the rate of spread.

Fire departments that serve areas along the wildland–urban interface have to be able to tackle traditional urban fires as well as wildland fires. Departments in these areas often use a wildland-urban interface engine, which combine features of a standard fire engine with that of a wildland fire engine.

Water tender

A water tender is a specialist fire appliance with the primary purpose of transporting large amounts of water to the fire area to make it available for extinguishing operations. These