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Development of a New Slip-Ringless Propeller Blade Measurement System
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English
Abstract
A new system for acquiring, transmitting, and recording the steady-state and vibratory stresses from multiple strain-gage locations on a propeller during flight and ground operation has been developed and tested. The system eliminates conventional slip rings and increases data capacity. The data system employs a 16-channel FM multiplex to transmit information across a single capacitive coupling and is self-powered through the rotary motion of the test propeller. In addition, an rpm/phase reference signal, digitally encoded time signals, and seven channels of aircraft operating parameters are accommodated.
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Authors
Citation
Walker, M., "Development of a New Slip-Ringless Propeller Blade Measurement System," SAE Technical Paper 700223, 1970, https://doi.org/10.4271/700223.Also In
References
- Dorshimer R. C. “Aircraft Propeller Vibration Measurement System.” Final Report to Federal Aviation Administration under Contract No. FA67NF-257
- “Vibration Tests to Determine Cause of High Tip Stresses in 7666-2 Blades Installed on Lycoming I0-360 Engine of 200 HP.” Engineering Report No. 71 Hartzell Propellers, Inc.