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Sphalerite has been found as a pseudomorph, taking the crystal structure of galena, tetrahedrite, barite and calcite. [13] [15] Sphalerite can have Spinel Law twins, where the twin axis is [111]. The chemical formula of sphalerite is (Zn,Fe)S; the iron content generally increases with increasing formation temperature and can reach up to 40%. [6]
In 2010, the Albanian Air Force operated Bell 205, Bell 206, AW109 and MBB Bo 105 helicopters. [2] In 2014, EC145 helicopters were also purchased while in 2016, 4 AS-532AL attack helicopters were delivered from France. [ 1 ]
The types consist of 1 VIP, 1 SAR, 1 medical evacuation, and 2 troop transportation helicopters. [67] [68] After the VIP helicopter crash in 2012 in the French Alps, in 2013, the Albanian side asked Eurocopter (now Airbus) to cancel the arrival of the last helicopter and its conversion to two light Eurocopter EC145M helicopters. [69] [70]
Following the fall of communism in Albania in 1990, the air force had 200 jets and 40 helicopters, and four Il-14 transport planes. [5] In the early 1990s, 7594 Regiment became Aviation Regiment 4020 , seemingly with its 1st Squadron of fighter aircraft and 2nd Squadron of FT-5s , and Y-5s ( Antonov An-2s ). [ 6 ]
It currently possesses a series of UAVs and UCAVs and is in the process of purchasing air-defence capabilities and aircraft. In January 2025, it was announced that Kosovo's minister of defence had reached an agreement with US State Department officials for the acquisition of several UH-60 Black Hawk helicopters and air defence radars.
The Albanian People's Army Air Force was formed in 1947 with a gift of twelve Yakovlev Yak-3 fighters and a few Polikarpov Po-2 biplane trainers from the Soviet Union, with Soviet personnel seconded as instructors and advisers. [1] The Albanian Air Force was officially established on April 24, 1951.
On 4 May, Oehmichen completed the first one-kilometer (0.62 mi) closed-circuit helicopter flight in 7 minutes 40 seconds with his No. 2 machine. [1] [65] In the US, George de Bothezat built the quadrotor helicopter de Bothezat helicopter for the United States Army Air Service but the Army cancelled the program in 1924, and the aircraft was ...
FM 1-112 Attack Helicopter Operations from 2 April 1997 by Headquarters Department of the Army at GlobalSecurity.org; FM 1-113 Utility and Cargo Helicopter Operations from 25 June 1997 by Headquarters Department of the Army at GlobalSecurity.org; FM 1-114 Air Cavalry Squadron and Troop Operations from 1 February 2000 by Headquarters Department ...