Helipad
Overview
 
Helipad is a common abbreviation for helicopter landing pad, a landing area for helicopter
Helicopter
A helicopter is a type of rotorcraft in which lift and thrust are supplied by one or more engine-driven rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forwards, backwards, and laterally...

s. While helicopters are able to operate on a variety of relatively flat surfaces, a fabricated helipad provides a clearly marked hard surface away from obstacles where a helicopter can safely land.
Helipads may be located at a heliport
Heliport
A heliport is a small airport suitable only for use by helicopters. Heliports typically contain one or more helipads and may have limited facilities such as fuel, lighting, a windsock, or even hangars...

 or airport
Airport
An airport is a location where aircraft such as fixed-wing aircraft, helicopters, and blimps take off and land. Aircraft may be stored or maintained at an airport...

 where fuel, air traffic control
Air traffic control
Air traffic control is a service provided by ground-based controllers who direct aircraft on the ground and in the air. The primary purpose of ATC systems worldwide is to separate aircraft to prevent collisions, to organize and expedite the flow of traffic, and to provide information and other...

, and service facilities for aircraft are available.
Encyclopedia
Helipad is a common abbreviation for helicopter landing pad, a landing area for helicopter
Helicopter
A helicopter is a type of rotorcraft in which lift and thrust are supplied by one or more engine-driven rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forwards, backwards, and laterally...

s. While helicopters are able to operate on a variety of relatively flat surfaces, a fabricated helipad provides a clearly marked hard surface away from obstacles where a helicopter can safely land.

Usage

Helipads may be located at a heliport
Heliport
A heliport is a small airport suitable only for use by helicopters. Heliports typically contain one or more helipads and may have limited facilities such as fuel, lighting, a windsock, or even hangars...

 or airport
Airport
An airport is a location where aircraft such as fixed-wing aircraft, helicopters, and blimps take off and land. Aircraft may be stored or maintained at an airport...

 where fuel, air traffic control
Air traffic control
Air traffic control is a service provided by ground-based controllers who direct aircraft on the ground and in the air. The primary purpose of ATC systems worldwide is to separate aircraft to prevent collisions, to organize and expedite the flow of traffic, and to provide information and other...

, and service facilities for aircraft are available. However, most helipads are located remotely away from such facilities due to space and cost constraints. Usually a helipad does not have fuel and service facilities for aircraft, and does not maintain a full time air traffic controller.

Many office towers maintain a helipad on their roofs in order to accommodate air taxi
Air taxi
An air taxi is an air charter passenger or cargo aircraft which operates on an on-demand basis.-Regulation:In the United States, air taxi and air charter operations are governed by Part 135 of the Federal Aviation Regulations , unlike the larger scheduled air carriers which are governed by more...

 services. Some basic helipads are built on highrise buildings for evacuation in case of a major fire outbreak. Major police departments may use a dedicated helipad at heliports as a base for police helicopter
Police helicopter
A police aircraft is an airplane, helicopter, powered paraglider, or blimpused in police operations. They are commonly used for traffic control, ground support, search and rescue, high-speed car pursuits, observation, air patrol and riot control...

s. Large ship
Ship
Since the end of the age of sail a ship has been any large buoyant marine vessel. Ships are generally distinguished from boats based on size and cargo or passenger capacity. Ships are used on lakes, seas, and rivers for a variety of activities, such as the transport of people or goods, fishing,...

s and oilrigs sometimes have a helipad on board (usually referred to as a helideck).

Helipads are common features at hospital
Hospital
A hospital is a health care institution providing patient treatment by specialized staff and equipment. Hospitals often, but not always, provide for inpatient care or longer-term patient stays....

s where they serve to facilitate MEDEVAC
MEDEVAC
Medical evacuation, often termed Medevac or Medivac, is the timely and efficient movement and en route care provided by medical personnel to the wounded being evacuated from the battlefield or to injured patients being evacuated from the scene of an accident to receiving medical facilities using...

s or air ambulance
Air ambulance
An air ambulance is an aircraft used for emergency medical assistance in situations where either a traditional ambulance cannot reach the scene easily or quickly enough, or the patient needs to be transported over a distance or terrain that makes air transportation the most practical transport....

 transfers of patients to trauma
Physical trauma
Trauma refers to "a body wound or shock produced by sudden physical injury, as from violence or accident." It can also be described as "a physical wound or injury, such as a fracture or blow." Major trauma can result in secondary complications such as circulatory shock, respiratory failure and death...

 units or to accept patients from remote areas without local hospitals or facilities capable of providing the level of emergency care required. In urban
Urban area
An urban area is characterized by higher population density and vast human features in comparison to areas surrounding it. Urban areas may be cities, towns or conurbations, but the term is not commonly extended to rural settlements such as villages and hamlets.Urban areas are created and further...

 environments, these heliports are typically located on the roof of the hospital.

Rooftop helipads sometimes display a large two-digit number, representing the weight limit (in thousands of pounds) of the pad. In addition, a second number may be present, representing the maximum rotor diameter in feet.

Location identifier
Location identifier
A location identifier is a symbolic representation for the name and the location of an airport, navigation aid, or weather station, and is used for manned air traffic control facilities in air traffic control, telecommunications, computer programming, weather reports, and related services.-ICAO...

s are often, but not always, issued for helipads. They may be issued from the FAA, ICAO, TC
Transport Canada
Transport Canada is the department within the government of Canada which is responsible for developing regulations, policies and services of transportation in Canada. It is part of the Transportation, Infrastructure and Communities portfolio...

 or IATA. Some helipads may have location identifiers from multiple sources.

Construction

Helipads are usually constructed out of concrete and are marked with a circle and/or a letter "H", so as to be visible from the air. However, they are not always constructed out of concrete; sometimes forest fire fighters will construct a temporary helipad out of wood to receive supplies in remote areas. Rig mats may be used to build helipads. Landing pads may also be constructed in extreme conditions like on frozen ice.

The world's highest helipad, built by India
India
India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

, is located in the Siachen Glacier
Siachen Glacier
The Siachen Glacier is located in the eastern Karakoram range in the Himalaya Mountains at about , just east of the Line of Control between India-Pakistan. India controls all of the Siachen Glacier itself, including all tributary glaciers. At long, it is the longest glacier in the Karakoram and...

at a height of 21,000 feet (6400 m) above the sea level.
The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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