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THE PROPOSED STUDY WILL EVALUATE THE REQUIREMENTS FOR HEAT REJECTION FROM THE VARIOUS SYSTEMS OF AN ULTRA-HIGH ALTITUDEADVANCED VARIABLE CYCLE DIESEL INSTALLED IN A DERIVATIVE AIRFRAME SUITABLE FOR THE AMES ATMOSPHERIC SAMPLING MISSION. A COMBINATION OF CONVECTIVE AND RADIATION HEAT TRANSPORT SYSTEMS WILL BE EVALUATED AND THEN INCORPORATED INTO A DIESEL SIMULATOR CODE FOR PERFORMANCE EVALUATION. C ...

SURFACE TENSION IS A FUNDAMENTAL PROPERTY OF ALL LIQUIDS. THE SURFACE TENSION OF LIQUIDS DURING PROCESSING AFFECTS THE PROPERTIES OF A VARIETY OF HIGH PERFORMANCE MATERIALS, I.E.: ALLOYS, CERAMICS, COMPOSITES, AND POLYCRYSTALLINE MATERIALS. SURFACE TENSION IS NOT ROUTINELY MEASURED FOR MOST EXPERIMENTAL NEW MATERIALS. THIS IS BECAUSE NO SIMPLE, ACCURATE, YET VERSATILE COMMERCIAL INSTRUMENT EXISTS. ...

NASA LEWIS RESEARCH CENTER HAS DEVELOPED AN ARC SPRAY PROCESS WHICH CAN FABRICATE LAMINATED TITANIUM ALUMINIDE COMPOSITES USING TITANIUM ALUMINIDE WIRE TO FORM THE MATRIX. THIS IS A SIGNIFICANT MATERIALS ADVANCE IN HIGH STRENGTH, HIGH TEMPERATURE PROPERTIES AT REDUCED WEIGHT. A MAJOR LIMITATION TO THE APPLICATION OF THIS PROCESS HAS BEENTHE BRITTLENESS OF CONVENTIONALLY FORMED TITANIUM ALUMINIDE W ...

A PROMISING NEW TECHNIQUE FOR DIRECT CASTING RAPIDLY SOLIDIFIED TITANIUM ALLOY RIBBONS FOR AIRFRAME HONEY COMB STRUCTURES WAS DEVELOPED BY RIBBON TECHNOLOGY CORPORATION (RIBTEC) WITH NASA SUPPORT. THE PLASMA MELT OVERFLOW PROCESS COMBINES TRANSFERRED PLASMA ARC SKULL MELTING TECHNIQUES AND MELT OVERFLOW RAPID SOLIDIFICATION TECHNOLOGY TO DIRECT CAST RIBBONS AND STRIP THAT ARE AMENABLE TO PROCESSIN ...

A LOW COST MEASUREMENT MODULE TAILORED TO THE APPLICATION OFSENSING RAIL LONGITUDINAL STRESS AND TEMPERATURE IS TO BE DEVELOPED AND INSTALLED IN TWO EXISTING TEST SITES. RESEARCH INTO THE BEST METHOD OF GENERATING POWER AND COMMUNICATING TO THE OUTSIDE WORLD WITHOUT HARD-WIRED CONNECTIONS IS TO BE DETERMINED. A PROTOTYPE OF THE NON-HARD-WIRED CONFIGURATION IS EXPECTED TO BE BUILT AND INSTALLED.