The Bell Huey family of helicopters includes a wide range of civil and military aircraft produced since 1956 by Bell Helicopter. This H-1 family of aircraft includes the utility UH-1 Iroquois series and ranges from the XH-40 prototype, first flown in October 1956 to the 21st Century UH-1Y Venom.
Source: Wikipedia, "Bell Huey family", available under the CC-BY-SA License.
The Bell UH-1 Iroquois is a military helicopter powered by a single, turboshaft engine, with a two-bladed main rotor and tail rotor. The helicopter was developed by Bell Helicopter to meet the United States Army's requirement for a medical evacuation and utility helicopter in 1952, and first flew on 20 October 1956. Ordered into production in March 1960, the UH-1 was the first turbine-powered helicopter to enter production for the United States military, and more than 16,000 have been produced worldwide.
The first combat operation of the UH-1 was in the service of the U.S. Army during the Vietnam War. The original designation of HU-1 led to the helicopter's nickname of Huey. In September 1962, the designation was changed to UH-1, but Huey remained in common use. Approximately 7,000 UH-1 aircraft saw service in Vietnam.
Source: Wikipedia, "Bell UH-1 Huey", available under the CC-BY-SA License.
The Bell 204 and 205 are the civil versions of the ubiquitous UH-1 Iroquois single-engine military helicopters. They are type-certificated in the transport category and are used in a wide variety of applications, including crop dusting, cargo lifting, and one of its most common uses, aerial firefighting.
Source: Wikipedia, "Bell 204/205", available under the CC-BY-SA License.
The Bell UH-1Y Venom (also called Super Huey) is a twin-engine medium size utility helicopter, part of the United States Marine Corps' H-1 upgrade program. The helicopter is also called Yankee for its variant letter.
The UH-1Y is currently in low-rate production to replace the USMC's aging fleet of UH-1N Twin Huey light utility helicopters first introduced in the early 1970s. The UH-1Y was to have been remanufactured from UH-1Ns, but in 2005 it was approved for the aircraft to be built as new.
The UH-1Y completed its developmental testing in early 2006. On 8 August 2008, the Marine Corps certified the UH-1Y as operationally capable and was deployed for the first time in January 2009 as part of the aviation combat element of the 13th Marine Expeditionary Unit.
Source: Wikipedia, "UH-1Y Venom", available under the CC-BY-SA License.