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The paper describes Shell's mobile instrumented vehicle for measuring road performance and exhaust emissions. Information is given on the design criteria and construction features of the vehicle and its instrumentation system. Test results show typical applications of the vehicle in providing data on the effect of engine adjustment and component condition on performance, fuel economy, and exhaust emissions. Instrumentation in the vehicle includes exhaust-gas analyzers to measure unburned hydrocarbons, carbon monoxide, nitric oxide, and carbon dioxide concentrations in the exhaust gases. The center of the system is a 40-channel magnetic tape data logger which can accumulate approximately 1.5 million data points per hour. The data logging system includes 10 operating parameters, 10 exhaust gas temperatures, and 20 vehicle and engine temperatures. Accumulators are used to log time, distance, and fuel consumption. Manual data are also logged as an event reference.

A NEW technique is described utilizing a dynamic micrometer to observe valve motion during actual operation under simulated highway conditions. Using this instrumentation, studies were conducted on the effect on valve life due to dynamic sticking resulting from additive concentration, valve motion, and valve flexure. The test data indicate that exhaust-valve burning in passenger-car engines appears to be due principally to valve-face corrosion.

Delivery of high quality fuels to commercial turbine engine aircraft may become more critical for supersonic transport operation. This paper presents high temperature stability test results on current aviation turbine fuel samples taken from refineries and airports throughout the world. Transportation methods involve combinations of tanker, barge, multiproduct pipeline, and truck movements. Data show that, through the application of proper handling techniques, fuels can be transported from refinery to aircraft, through complex distribution systems, with no significant loss in thermal stability. Data also indicate that current aviation turbine fuels are well above the minimum thermal stability specification limits for present subsonic jet aircraft.

To verify the practicality of a single-grade general aviation avgas which would meet the needs of engines using grade 80/87 and 100/130 fuel, a flight evaluation was conducted in selected light aircraft. Some 2200 hr of actual flight operation demonstrated the acceptability of this fuel for grade 80/87 certificated aircraft, together with a performance advantage for grade 100/130 users.

A study has been made by the Coordinating Research Council (CRC) of electrostatic phenomena during the fueling of both a full-scale mockup of a typical jet aircraft wing tank and a small-scale rig representing a single compartment of an integral wing tank. The tests were performed with equipment typical of modern aircraft fueling installations and using several batches of typical aviation turbine fuels as supplied by the manufacturers.