Bell 206 Long Ranger

Bell 206
JetRanger / LongRanger
A LAPD Bell 206 JetRanger
Role Multipurpose Utility helicopter
National origin Canada
Manufacturer Bell Helicopter Textron
First flight December 8, 1962 (206)[1]
10 January 1966 (206A)[2]
Introduction 1967
Status In service
Produced 1962-2010
Number built 7,300[3]
Unit cost
US$900K to $1.2M[3]
Developed from Bell YOH-4
Variants OH-58 Kiowa
Panha Shabaviz 2061
Developed into Bell 407

The Bell 206 is a family of two-bladed, single- or twin-engine helicopters, manufactured by Bell Helicopter at its Mirabel, Quebec plant. Originally developed as the Bell YOH-4 for the United States Army's Light Observation Helicopter program, the 206 failed to be selected. Bell redesigned the airframe and successfully marketed the aircraft commercially as the five-place Bell 206A JetRanger. The new design was eventually selected by the Army as the OH-58 Kiowa. Bell also developed a seven-place LongRanger, which was later offered with a twin-engine option as the TwinRanger, while Tridair Helicopters offers a similar conversion of the LongRanger called the Gemini ST. The ICAO-assigned model designation "B06" is used on flight plans for the JetRanger and LongRanger, and the designation "B06T" is used for the twin-engine TwinRangers.

Development

On October 14, 1960, the United States Navy solicited response from 25 aircraft manufacturers to a request for proposals (RFP) on behalf of the Army for the Light Observation Helicopter (LOH). Bell entered the competition along with 12 other manufacturers, including Hiller Aircraft and Hughes Tool Co., Aircraft Division.[4] Bell submitted the D-250 design, which would be designated as the YHO-4.[5] On May 19, 1961, Bell and Hiller were announced as winners of the design competition.[6][7]


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.[1] The YOH-4A also became known as the Ugly Duckling in comparison to the other contending aircraft.[1] Following a flyoff of the Bell, Hughes and Fairchild-Hiller prototypes, the Hughes OH-6 was selected in May 1965.[8]

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 quarters for the planned three passengers in the back. The solution was a fuselage redesigned to be more sleek and aesthetically appealing, adding 16 cubic feet (0.45 m3) of cargo space in the process.[9] A Bell executive contributed to this redesign by drawing on a sketch two lines extending the fuselage to where it meets the tail.[10] The redesigned aircraft was designated as the Bell 206A, and Bell President Edwin J. Ducayet named it the JetRanger denoting an evolution from the popular Model 47J Ranger.

206L LongRanger

The 206L LongRanger is a stretched variant with seating for seven (the LongRanger, stretched a total of 30 inches (760 mm), adds two rear-facing seats in between the front and rear seats). Since their first delivery in 1975, Bell has produced more than 1,700 Ls across all variant types. In 1981 a military version was released, the 206L "TexasRanger". The original 206L utilized 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 with 490 shaft horsepower and included twin turbine engines.

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 max gross weight increase of 300 pounds and increased performance.[11]

On January 24, 2008, Bell Helicopter announced plans to terminate production of the Bell 206B-3 model after current order commitments were fulfilled in 2010.[12] In 2011, used 206B-3s sell for approximately up to $1.4 million depending upon the equipment and configuration.[13]

Gemini ST and TwinRanger

The TwinRanger name dates back to the mid-1980s when Bell first developed the Bell 400 TwinRanger, but it never entered production.[14]

In 1989, Tridair Helicopters began developing a twin engine conversion of the LongRanger, the Gemini ST. The prototype's first flight was on 16 January 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.[14] 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.[14]

The Bell 206LT TwinRanger was a new build production model equivalent to Tridair's Gemini ST, and was based on the 206L-4. Only thirteen 206LTs were built, the first being delivered in January 1994, and the last in 1997. The TwinRanger was replaced in Bell's line-up by the mostly-new Bell 427.[14]

Operational history


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 full certification by the Federal Aviation Administration (FAA). Delivery of the JetRanger to customers began on January 13, 1967, with the first aircraft being purchased by Harry Holly, president of the Hollymatic Company and previous owner of a Bell Ranger.[9]

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 took off from Dallas, Texas in the "Spirit of Texas", a Bell 206L-2 (N3911Z). 29 days and 3 hours later, they returned on September 30, 1982, completing the first around the world helicopter flight[15] making them Earthrounders.[16] In 1983, Australian Businessman Dick Smith became the first helicopter pilot to complete a solo trip around the world in 260 flight hours. During the trip, he landed his 206B-3 (S/N 3653; VH-DIK) on prepositioned container ships to refuel between Japan and the Aleutian Islands.

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.

On July 22, 1994, Ron Bower landed his 206B-3 (N206AJ) at Hurst, Texas, completing a new world record, around the world flight. Bower had departed on June 24, 1994 and returned 24 days, 4 hours, 36 minutes and 24 seconds later, averaging 35.62 knots (40.99 mph, 65.97 km/h).[17] Bower had added a 91-gallon auxiliary fuel tank, which doubled the JetRanger III's range.[18]

Variants


Civilian

  • Bell 206 - Five (5) YOH-4A prototypes, for flight evaluation in the Army's LOH program (1963).
  • Bell 206A - Initial production version, powered by an Allison 250-C18 turboshaft engine. FAA-certified in 1966. Selected as the OH-58A Kiowa in 1968.
    • Agusta-Bell 206A - License-built in Italy
  • Bell 206A-1 - OH-58A aircraft that are reverse-modified for FAA civil certification.[19]
  • Agusta-Bell 206A-1 - License-built in Italy
  • Bell 206B - Upgraded Allison 250-C20 engine.[20]
    • Agusta-Bell 206B - License-built in Italy
  • Bell 206B-2 - Bell 206B models upgraded with Bell 206B-3 improvements.[20]
  • Bell 206B-3 - Upgraded Allison 250-C20J engine and added 2 inches (51 mm) to tail rotor diameter for yaw control.[20]
  • Bell 206L LongRanger - Stretched, seven seat configuration, powered by an Allison 250-C20B turboshaft engine.
    • Agusta-Bell 206L LongRanger — License-built in Italy
  • Bell 206L-1 LongRanger II - Higher-powered version, powered by an Allison 250-C28 turboshaft engine.
    • Agusta-Bell 206L-1 - License-built in Italy.
  • Bell 206L-1+ LongRanger - Bell modifications, including 250-C30P engine, to upgrade aircraft to 206L-4 configuration.
  • Bell 206L-3 LongRanger III - Powered by an Allison 250-C30P turboshaft engine.
    • Agusta-Bell 206L-3 - License-built in Italy.
  • Bell 206L-3+ LongRanger - Bell modifications to upgrade aircraft to 206L-4 configuration.
  • Bell 206L-4 LongRanger IV - Improved version, 250-C30P engine and transmission upgrade.
  • Bell 206LT TwinRanger - Twin-engined conversions and new-builds of the 206L; replaced by the Bell 427.
  • Bell 407 - based on the 206L with four-bladed rotor system
  • Bell 417 - upgraded 407 with bigger engine; project cancelled.

Military


Bell 206AS 
Export version for the Chilean Navy.
Bell CH-139 JetRanger 
Canadian military designation for the Bell 206B-3.
OH-58 Kiowa 
Light observation helicopter that replaced the OH-6A Cayuse.
TH-57A Sea Ranger
40 commercial Bell 206A aircraft purchased as the primary U.S. Navy helicopter trainer in January 1968 for training prospective U.S. Navy, U.S. Marine Corps, U.S. Coast Guard and select NATO/Allied helicopter pilots.[21]
206L TexasRanger 
proposed export military version, only a demonstrator was built in 1981.
TH-57B 
45 commercial Bell 206B-3 helicopters purchased by the U.S. Navy in 1989 as replacements for the TH-57A for primary training under visual flight rules.
TH-57C 
71 commercial Bell 206B-3 helicopters purchased by the U.S. Navy beginning prior to 1985 with cockpits configured for advanced training under instrument flight rules.
TH-57D 
Planned upgrade program to convert U.S. Navy TH-57B and TH-57C aircraft to a single standard digital cockpit.[22]
TH-67 Creek 
137 commercial Bell 206B-3 purchased in 1993 as the primary and instrument helicopter trainer for the U.S. Army at Fort Rucker, Alabama. 35 in VFR configuration and 102 in IFR configuration. The U.S. Army currently has 181 of which 121 are in VFR configuration and 60 are in IFR configuration. All TH-67 display U.S. registrations ("N" numbers) and are operated as public use aircraft.

Operators




Civil

The Bell 206 has been popular all types of uses both commercial and private.

Military and government

 Albania
 Argentina
 Bangladesh
 Brazil
 Bulgaria
 Canada
 Chile
 Colombia
 Croatia
 Ecuador
 Finland
 Iran
 Israel
 Italy
 Latvia
 Macedonia
 Mexico
 Pakistan
 Republic of China (Taiwan)
 Serbia
 Slovenia
 Thailand
 Turkey
 Uganda
 United States
 Venezuela

Former military and government

 Chile
 Jamaica
 Malta
 Sweden

Specifications (206B-L4)

Data from Bell 206B-L4 specifications[66][67]

General characteristics
  • Crew: 1 pilot
  • Capacity: 4 passengers
  • Length: 39 ft 8 in (12.11 m)
  • Rotor diameter: 33 ft 4 in (10.16 m)
  • Height: 9 ft 4 in (2.83 m)
  • Disc area: 872 ft² (81.1 m²)
  • Empty weight: 1,713 lb (777 kg)
  • Max. takeoff weight: 3,200 lb (1,451 kg)
  • Powerplant: 1 × Allison 250-C20B turboshaft, 450 shp; derated to 317 shp due to drivetrain limitations (310 kW)

Performance

See also

Aviation portal

Related development
Aircraft of comparable role, configuration and era

Related lists

References

External links

  • Bell Model 206L-4 page on Bell's site
  • Bell Model 206 GlobalSecurity.org
  • TH-57 military version at GlobalSecurity.org
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.