Delaware Valley Historical Aircraft Association

History

Little history is known about the Museum’s Bell H-13G "Sioux" (Bell 47G). It apparently started life with the National Guard and, after being retired from active service, went to a trade-school where it was used as a maintenance training device. From there it was recovered by our Museum and restored at Carson's Helicopters shops for display in the museum.

The Bell H-13 (or in civilian service called the Bell Model 47) had a long and varied history as a production machine. It was the first FAA certified civil helicopter (1946) and was in production from 1946 through 1974. Over 4,500 helicopters were built in approximately 26 commercial models and 22 military models. In addition, the aircraft was build under license in several foreign countries.

The H-13G on display in the museum was one of approximately 264 aircraft produced under this model designation. In addition an additional 48 Navy HTL-6 and over 200 civilian versions of this model were also produced. The aircraft is powered by a 200 hp O-335 Franklin engine which in normal flight would be running at 3000 to 3200 rpm, thus with a 9 to 1 reduction in the transmission this means that the main rotor would turn 333 to 355 rpm.

The standard main rotor blades were made mainly from wood with fiberglass covering. As displayed the aircraft has metal blades installed which entered production on a later model (H-13H). The two saddle fuel tanks hold a total of 43 gallons.

Normal crew is one pilot. With dual controls installed, an additional crewmember or passenger can be carried. If the dual controls are removed, then there is room for the pilot and two passengers. The aircraft can be flown with or without doors.