Bell developed the D-250 design into the Bell 206 aircraft, redesignated as YOH-4A in 1962, and produced five prototype aircraft for the Army's test and evaluation phase. The first prototype flew on December 8, 1962. The YOH-4A also came to be known as "The Ugly Duckling" in comparison to the other contending aircraft. Following a fly-off of the Bell, Hughes and Fairchild-Hiller prototypes, the Hughes OH-6 was selected in May 1965.
When the YOH-4A was eliminated by the Army, Bell went about solving the problem of marketing the aircraft. In addition to the image problem, the helicopter lacked cargo space and only provided cramped seating for the planned three passengers. The solution was a redesigned fuselage, sleeker and aesthetically appealing, adding 16 ft3 (0.45 m3) of cargo space in the process. A Bell executive contributed to this redesign by drawing on a sketch two lines extending the fuselage to where it meets the tail. The redesign was designated Bell 206A, and Bell President Edwin J. Ducayet named it the JetRanger, denoting an evolution from the popular Model 47J Ranger.
Bell Helicopter ended production of the Bell 206B-3 version in 2010. In 2011, used 206B-3s sold for around $1.4 million depending upon the equipment and configuration. Bell intends for the Bell 505 Jet Ranger X to replace the 206 five-seat versions from around 2015 and compete with the Robinson R66.
The 206L LongRanger is a stretched variant with seating for seven. The fuselage, stretched a total of 30 inches (760 mm), adds two rear-facing seats between the front and rear seats. Since 1975, Bell has produced more than 1,700 LongRangers across all variant types. In 1981, a military version, the 206L TexasRanger was released. The original 206L used an Allison 250-C20B engine, and a series of model upgrades replaced this engine with more powerful versions; the 206L-1 used a 250-C28, and the 206L-3 and 206L-4 used the 250-C30P.
In both applications, the 250-C30P is derated from 650 hp for takeoff and 501 hp continuous. The 206L-3 is transmission-limited to 435 hp for take-off, and the 206L-4 is transmission-limited to 495 hp. The derating of the C30P produces an advantage in hot-day and high-altitude operations as it can produce the rated horsepower at higher altitudes and temperatures where applications that use the maximum rating of the engine at sea level suffer accelerated performance deterioration with increases in temperature and altitude. The 206L-3 and L-4 have not been offered in a twin configuration under those model designations.
In 2007, Bell announced an upgrade program for the 206L-1 and 206L-3 which is designed to modify the aircraft to the 206L-4 configuration; modified aircraft are designated 206L-1+ and 206L-3+. Modifications include strengthened airframe structural components (including a new tailboom), improved transmission, upgraded engine for the L-1, all of which result in a maximum gross weight increase of 300 pounds and increased performance.
Production of the 206L-4 ended in June 2017 with over 3,800 LongRangers built.
In 1989, Tridair Helicopters began developing a twin-engine conversion of the LongRanger, the Gemini ST. The prototype's first flight was on January 16, 1991, while full FAA certification was awarded in November. Certification covers the conversion of LongRanger 206L-1s, L-3s and L-4s to Gemini ST configuration. In mid-1994 the Gemini ST was certificated as the first Single/Twin aircraft, allowing it to operate either as a single or twin engine aircraft throughout all phases of flight.
The first Bell 206A flew on January 10, 1966, and the aircraft was revealed later that month at the Helicopter Association of America (HAA) convention. On October 20, 1966, the JetRanger received FAA certification. Delivery of the JetRanger to customers began on January 13, 1967, with the first aircraft being purchased by Harry Holly, CEO of the Hollymatic Corporation and previous owner of a Bell Ranger. In 1968, the United States Navy selected the 206A as its primary trainer, the TH-57 Sea Ranger. The Army also eventually selected the 206A for a light observation helicopter as the OH-58 Kiowa.
The basic shape and design of the JetRanger remained unchanged since 1967, but Bell introduced the 206B JetRanger II in 1971. In 1977, the 206B-3 JetRanger III was introduced with its modified tail rotor and more powerful engine. The JetRanger is popular with news media for traffic and news reporting. The LongRanger is commonly used as an air ambulance and as a corporate transport. On September 1, 1982, pilots H. Ross Perot, Jr. and Jay Coburn departed Dallas, Texas in the "Spirit of Texas", a Bell 206L-2 (N3911Z). They returned on 30 September, 29 days and 3 hours later, completing the first around-the-world helicopter flight.
The Bell 206B was first introduced to the Canadian market shortly after its certification in 1967. Its early adoption was driven by the booming resource industries of the time, particularly in oil and gas exploration, mining, and forestry. Its light weight, combined with the ability to land in rugged, remote locations, made it an ideal tool for transporting geologists, surveyors, and equipment to otherwise inaccessible areas of Canada's vast wilderness.
In 1993, the U.S. Army chose the Bell 206B-3 as the winner of the New Training Helicopter competition, to serve as its primary training helicopter, the TH-67 Creek. The number of TH-67s being divested by the Army is too small to impact civilian markets.
On January 12, 1994, an Agusta-Bell 206A-1 crashed while attempting to land at the helipad of the Central Command headquarters in Neve Yaakov, killing all four occupants on board, including IDF Major General Nehemiah Tamari.
On March 9, 2009, Bangladesh Army aviation unit Bell 206L flown by pilot Lt Col MD Shahidul Islam and co-pilot Major Saif crashed at Rouha in Kalihati sub-district. The helicopter was carrying General Officer Commanding of 55 Infantry Division and Jessore Area Commander Maj Gen Rafiqul Islam. Maj Gen Islam and pilot Lt Col Islam died in the crash while co-pilot Major Saif sustained serious injuries.
The Bell 206 has been popular for all types of uses both commercial and private.
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