LABORATORY TESTING OF MODEL 568T1 HELICOPTER AIRSPEED SYSTEMS,
Abstract
Laboratory testing of five Model 568T1 helicopter airspeed systems shows that they are capable of measuring helicopter true airspeed over the operating speed range of the helicopter. The system is substantially electrical and is based on the continuous measurement of the variation in a rotor blade tip speed relative to the surrounding air. The variation in blade tip speed is measured and utilized to simultaneously present true airspeed on two airspeed indicators - one indicating true airspeed along the longitudinal axis of the helicopter - the other indicating true airspeed along the lateral axis of the helicopter. The systems were designed to supersede a previous instrument whose flight testing, on a XH03S-2 type helicopter, substantiated the basic theory. Each one of the five Model 568T1 airspeed systems was mechanically designed and electrically adjusted for use on a specific type of helicopter; type HSS-1, HSS-2, HR2S, HU2K-1, or HUP3. Laboratory testing gives promise that the flight testing of the systems will show that they are suited for operational use. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 28, 1962
- Accession Number
- AD0430833
Entities
People
- E. T. Skelly
Organizations
- Calspan