Brantly B-1

Last updated
Brantly B-1
Rolelight coaxial-rotor helicopter
Manufacturer Brantly Helicopter Corporation
Designer Newby O. Brantly
First flight 1946
Statusabandoned

The Brantly B-1 was a 2-seat, coaxial-rotor helicopter designed by Newby O. Brantly and constructed by the Pennsylvania Elastic Company, Brantly's employer.

Contents

Design and development

In 1946, Brantly started flight testing the B-1 prototype (NX69125), which used a 150 hp Franklin O-335 engine in the fabric fuselage and two three-bladed rotors that rotated at 320 rpm and were fitted coaxially. The collective, cyclic, and differential controls were enclosed in the rotor hubs and ran in an oil-bath. Each rotor blade weighed 5.5 kilos. It also had a fixed wheel undercarriage with a tailwheel under the tailfin. [1]

Unfortunately, the design was too heavy and complex and was abandoned.

Specifications

Data from [2]

General characteristics

Performance

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References

  1. Simpson, R.W. (26 May 1998). Airlife's Helicopters and Rotorcraft. The Crowood Press Ltd. ISBN   978-1853109683.
  2. Lambermont, Paul Marcel; Pirie, Anthony (1970). Helicopters and autogyros of the world (Illustrated, revised ed.). Barnes.