1965-02-01

A Reciprocating Viscometer for Predicting the Low Temperature Cranking Characteristics of Engine Oils 650443

The need for a viscometer to accurately predict the cranking characteristics of oils in engines at low temperatures led to the development of a reciprocating viscometer. This paper describes the development of this viscometer including studies made using model aircraft engines to test the feasibility of the approach. Data are presented on various test oils to show correlation between engine viscosities determined in full scale engines and corresponding data obtained in the model aircraft engines and reciprocating viscometers. Results show that this viscometer has the ability to predict low temperature cranking properties of engine oils in full scale engines.

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