While helicopters and powered lift aircraft are able to operate on a variety of relatively flat surfaces, a fabricated helipad provides a clearly marked hard surface away from obstacles where such aircraft can land safely.
Most helipads are located away from populated areas due to sounds, winds, space and cost constraints. Some skyscrapers have one on their roofs to accommodate air taxi services. Some basic helipads are built on top of 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 helicopters.
Helipads are common features at hospitals where they serve to facilitate medical evacuation or air ambulance transfers of patients to trauma centers or to accept patients from remote areas without local hospitals or facilities capable of providing the level of emergency medicine required. In urban environments, these heliports are sometimes 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. A second number may be present, representing the maximum rotor diameter in feet.
Location identifiers are often, but not always, issued for helipads. They may be issued by the appropriate aviation authority. Authorized agencies include the Federal Aviation Administration in the United States, Transport Canada in Canada, the International Civil Aviation Organization, and the International Air Transport Association. Some helipads may have location identifiers from multiple sources, and these identifiers may be of different format and name.
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. Sometimes wildfire fighters will construct a temporary one from timber to receive supplies in remote areas. Rig mats may be used to build helipads. Landing pads may also be constructed in extreme conditions such as on ice.
A portable helipad is a helipad structure with a rugged frame that can be used to land helicopters in any areas with slopes of up to 30 degrees, such as hillsides, riverbeds and boggy areas. Portable helipads can be transported by helicopter or powered-lift to place them where a VTOL needs to land, as long as there are no insurmountable obstructions nearby.
See also edit
- "Home - Vertiport Chicago". Vertiport Chicago. Archived from the original on 2021-02-26. Retrieved 2015-06-19.
- "Vertiport opens in downtown Chicago". wgntv.com. 30 April 2015. Archived from the original on 14 August 2018. Retrieved 19 June 2015.
- FAA Advisory Circular 150/5390-2B Archived 2009-11-23 at the Wayback Machine page 51
- "Helicopter landing at Point Sonam Siachen". adm.helipaddy.com. Archived from the original on 2016-03-04. Retrieved 2015-11-01.
- Nick Easen (2003-09-17). "Siachen: The world's highest cold war". CNN. Archived from the original on 2016-08-23. Retrieved 30 March 2009.
- de Voogt, A.J. 2007. Helidrome Architecture. Rotterdam: 010 Publishers.
- ICAO 1995. Heliport manual. Montreal, Canada: ICAO Publications.