General Overview

Proposals are sought for an aviation engine sensor to detect and alert system diagnostics of low lubricant viscosity. Aviation Turbine Engine lubricant is polyol ester based meeting MIL-PRF-23699 having viscosity limits of 4.9 minimum cSt @ 100 ⁰C and 23.0 minimum cSt @ 40 ⁰C. Lubricant degradation causes the viscosity to breakdown leading to reduced ElastoHydroDymanic (EHD) film thickness protecting the oil wetted components. Lubricant viscosity is directly proportional to film thickness protecting rotating hardware surfaces from wear. Even a momentary breakdown of this film will cause metal-metal touch-down and wear, which will lead to reduced engine life. Sensor technology is well advanced in terms of condition monitoring (Total Acid Number and anti-oxidant levels) and wear debris. Viscosity is the key to knowing the film thickness and ideas are sought for a small project ($ 50K) exploring the feasibility of an aerospace quality viscosity sensor to alert us of impending lubricant film loss and gear/bearing wear. Existing technology and devices suitable for engine system insertion are desired but the proposal may be applicable to Applied Research.

Application procedure

Please express your interest by e-mail: ken.baker@pw.utc.com

Contact

Kenneth N. Baker

Ph.D. Lubricant Specialist

Pratt & Whitney

Tel.: 860-557-1426

Fax: 860-622-6510

E-mail: ken.baker@pw.utc.com