Central Air Command

The Central Air Command is one of the five operational commands of the Indian Air Force. It is currently headquartered in Allahabad in Uttar Pradesh. It was formed on 19 March 1962, at Rani Kuthee, Calcutta.

History

Due to the possibility of war with China, No. 1 Operational Group was formed on 27 May 1958 at Ranikuthee in Calcutta, to look after all the units. In 1959, it was upgraded to Eastern Air Force (EAF). In 1962, after the Sino-Indian War, EAF was moved to Shillong and Central Air Command (CAC) was formed on 19 March 1962 with its headquarters at Rani Kuthee, Calcutta (now Kolkata). Calcutta was considered an inappropriate location for the Central Air Command Headquarters and it was relocated to Allahabad in February 1966.

During the Indo-Pakistani War of 1965, CAC English Electric Canberras carried out 163 bombing and 33 close air support sorties against Pakistani forces, and raided Pakistan Air Force airbases at Mauripur, Multan, Sargodha, Peshawar, and Chaklala. Squadron Leader Charanjit Singh and Flt Lt Mangat Singh made a 'brilliant raid' on the night of 13-14 September 1965, by carrying out a major air base attacks at Peshawar. Three Mahavir Chakras were awarded to the members of Canberra squadrons. In a major attack, seven Canberras of No. 35 Squadron attacked the oil storage tanks at Karachi, destroying about 60 % of Pakistan's oil reserves.

Air conditioning

Air conditioning (often referred to as A/C or AC) is the process of altering the properties of air (primarily temperature and humidity) to more comfortable conditions, typically with the aim of distributing the conditioned air to an occupied space such as a building or a vehicle to improve thermal comfort and indoor air quality. In common use, an air conditioner is a device that lowers the air temperature. The cooling is typically achieved through a refrigeration cycle, but sometimes evaporation or free cooling is used. Air conditioning systems can also be made based on desiccants.

In the most general sense, air conditioning can refer to any form of technology that modifies the condition of air (heating, cooling, (de-)humidification, cleaning, ventilation, or air movement). However, in construction, such a complete system of heating, ventilation, and air conditioning is referred to as heating, ventilation, and air conditioning (HVAC -as opposed to AC).

History

The basic concept behind air conditioning is said to have been applied in ancient Egypt, where reeds were hung in windows and were moistened with trickling water. The evaporation of water cooled the air blowing through the window. This process also made the air more humid, which can be beneficial in a dry desert climate. In Ancient Rome, water from aqueducts was circulated through the walls of certain houses to cool them. Other techniques in medieval Persia involved the use of cisterns and wind towers to cool buildings during the hot season.

Air Command

Air Command is a term used to refer to the command structure of some air forces. Examples include:

Royal Canadian Air Force

The Royal Canadian Air Force (RCAF) (French: Aviation royale canadienne, ARC) is the air force of Canada. The RCAF is one of three environmental commands within the unified Canadian Armed Forces. As of 2013, operating 258 manned aircraft and 9 unmanned aerial vehicles, the Royal Canadian Air Force consists of 14,500 Regular Force and 2,600 Primary Reserve personnel, supported by 2,500 civilians. Lieutenant-General Michael J. Hood, CMM CD, is the current Commander of the Royal Canadian Air Force and Chief of the Air Force Staff.

The Royal Canadian Air Force is responsible for all aircraft operations of the Canadian Forces, enforcing the security of Canada's airspace and providing aircraft to support the missions of the Royal Canadian Navy and the Canadian Army. The RCAF is a partner with the United States Air Force in protecting continental airspace under the North American Aerospace Defense Command (NORAD). The RCAF also provides all primary air resources to and is responsible for the National Search and Rescue Program.