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Aviation / Aerospace

Bell Model 533 (High Performance Helicopter)

Experimental / Research Helicopter [ 1962 ]

One Bell Model 533 was built for the United States Army to research high-speed rotor flight.

Authored By: Staff Writer | Last Edited: 12/13/2017 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.

GO TO SPECIFICATIONS [+]

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The classic Bell Huey helicopter went on to become the workhorse of the West throughout the Cold War period (1947-1991) and many offshoots of this successful design continue in service today (2017). Back when the Huey product was still in its relative infancy, the company teamed with the United States Army to test the limits of high-speed rotorcraft through a combination powerplant arrangement. An early-model Huey was outfitted with wing mainplanes and fuselage-mounted jet engines for added propulsion to become the Bell Model 533 - also known as the "High Performance Helicopter".

Bell Helicopter satisfied the U.S. Army requirement for the project and the two teamed up to bring the Model 533 to fruition in August of 1961. The developmental YH-40-BF helicopter, one of the six pre-series Hueys to be built, was selected as the primary specimen for the project. Beyond streamlining the helicopter's fuselage for aerodynamic efficiency (including modifying the rotor blades) there would be notable additions to its base design including the installation of wing mainplanes (eventually swept back) and turbojet engines, the latter to provide auxiliary forward thrust to help increase overall speeds. Internally, several changes also occurred in the way the helicopter was constructed and assembled to further strengthen the already versatile design for the rigors of high-speed flying.©MilitaryFactory.com

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The revised Huey aircraft then took to the skies for the first time (though sans its jet powerplants) on August 10th, 1962. In October of 1963, testing with the turbojet engines in place was begun and the aircraft managed speeds of 214 miles per hour. The U.S. Army and Bell completed their commitment to the project in April of 1964 but Bell continued with the Model 533 for a time longer - introducing the J69-T-29 turbojet engines of 1,700lb thrust to bring the helicopter to speeds of 236 miles per hour and, later, speeds of 250 miles per hour. Before the end, the aircraft was outfitted with Pratt & Whitney JT12A-3 engines of 3,300lb thrust output (each) to which point, in April of 1969, the aircraft flew at its maximum tested speed of 316 miles per hour.

Only this single Model 533 was ever constructed for the program and it was given to the United States Army Aviation Applied Technology Directorate to be displayed outside at Fort Eustis, Virginia.©MilitaryFactory.com

Note: The above text is EXCLUSIVE to the site www.MilitaryFactory.com. It is the product of many hours of research and work made possible with the help of contributors, veterans, insiders, and topic specialists. If you happen upon this text anywhere else on the internet or in print, please let us know at MilitaryFactory AT gmail DOT com so that we may take appropriate action against the offender / offending site and continue to protect this original work.

Specifications

Service Year

1962

Origin

United States

Status

RETIRED
Not in Service.

Crew

2

Production

1
UNITS

Bell Helicopter - USA

(View other Aviaton-Related Manufacturers)

United States (retired)

(OPERATORS list includes past, present, and future operators when applicable)

✓ Transport
General transport functionality to move supplies/cargo or personnel (including wounded and VIP) over range.

✓ X-Plane (Developmental, Prototype, Technology Demonstrator)
Aircraft developed for the role of prototyping, technology demonstration, or research / data collection.

Length

57.1 ft
(17.40 m)

Width/Span

49.2 ft
(15.00 m)

Height

14.4 ft
(4.40 m)

(Showcased structural values pertain to the Bell Model 533 HPH production variant)

Installed: 1 x Turboshaft engine driving a two-bladed main rotor and two-bladed tail rotor.

Max Speed

316 mph
(508 kph | 274 kts)

♦ MACH Regime (Sonic)

Sub

Trans

Super

Hyper

HiHyper

ReEntry

♦

(Showcased performance specifications pertain to the Bell Model 533 HPH production variant. Performance specifications showcased above are subject to environmental factors as well as aircraft configuration. Estimates are made when Real Data not available. Compare this aircraft entry against any other in our database or View aircraft by powerplant type)

None.

Supported Types

(Not all ordnance types may be represented in the showcase above)

Model 533 - Base Project Designation

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Images Gallery

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Image of the Bell Model 533 (High Performance Helicopter)

Image from the Public Domain.

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