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Designation: HTL-2

Bell HTL-2

Bell HTL-2 Siox

A picture of the Bell HTL-2 Siox

In May 1946, the Bell Model 47 became the first helicopter in the world to receive a commercial type certificate.  The helicopter’s high price of over $20,000 resulted in few early commercial sales, but the military showed an early interest in the design and the Army acquired its first example in December 1946.  HTL-2 is the Navy designation for the improved Model 47D with a more powerful engine and a Plexiglas bubble cockpit.  A total of twelve HTL-2s were built and all were delivered to the Navy in 1948.  The HTL-2 on display at the Pima Air & Space Museum is the first one built.

Diameter 35 ft 1.5 in.

Diameter of Main Rotor

Length 41 ft 2.5 in.


Height 9 ft 2 in.


Weight 2,078 lbs (loaded)


Max. Speed 92 MPH

Maximum Speed

Service Ceiling 13,000 ft

Service Ceiling

Range 214 miles


Engines One Franklin O-335-3 engine with 178 horsepower


Crew 2



Test Squadron 3 (VX-3), San Diego Naval Air Station, California, 1948

Serial Number


Pima Air & Space Museum

Creating unlimited horizons in aerospace education through the preservation and presentation of the history of flight.

Charity EIN: 86-6031135

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