Tanks in World War I
The continued need for four men to drive the tank was solved with the Mark V which used Wilson's epicyclic gearing in 1918. Also in 1918 the French produced the Renault FT, the result of a co-operation between Estienne and Louis Renault. As mentioned before, it had the innovative turret position, and was operated by two men. At just 8 tons it was half the weight of the Medium A "Whippet" but the version with the cannon had more firepower. It was conceived for mass production, and the FT became the most produced tank of World War I by a wide margin, with over 3,000 delivered to the French Army. Large numbers were used by the Americans and several were also lent to the British.
DC-10 Air Tanker
The DC-10s operate with a flight crew of three, a pilot, co-pilot and a flight engineer. The tanker works with a lead plane and can be an effective tool in combating wildfires when working directly with ground resources. 10 Tanker Air Carrier added a second DC-10 (N17085), formerly flown by Continental Airlines, to its fleet in July 2008, to be used on an on-call basis. On December 19, 2009, the aircraft – designated Tanker 911 – arrived in Melbourne, Australia, for the Australian fire season. Leased by the National Aerial Firefighting Centre on behalf of the Victoria state government, the DC-10 became operational in Australia in early January 2010, based at Avalon. The Premier of Victoria at the time, John Brumby, described the leasing of the tanker as being part of a record financing program to make sure the state was as fire-ready as possible. In late 2014, the company added two additional DC-10s which had previously served with Omni and Northwest Airlines, N612AX and N522AX, which were numbered as Tankers 910 and 912 respectively. The original aircraft, N450AX, was subsequently withdrawn from use in November 2014.