Multiroller planetary traction drives (figure 1) offer a unique combination of compactness, high efficiency and high torsional stiffness in high ratio drives. they have the added advantages of back-lash free operation, low noise and vibration, no gear cogging and smooth torque transfer in… More

To eliminate dynamic disturbances to the space station and its onboard experiments it would be desirable to provide actuator drives and drives for dynamic experiments which have a zero net output torque. this can be accomplished by utilizing drives with dual, counterrotating, torque balancedoutputs.… More

It is proposed to develop an accurate, in-service transmission life-estimation system for the prediction of remaining component and system life for a helicopter transmission system. Once proven in the helicopter environment, this life-estimation system will be of use to a wide variety of airborne… More

It is proposed to develop an accurate, in-service transmission life-use estimation system for the prediction of remaining component and system life for a helicopter transmission system. Once proven in the helicopter environment, this life- use estimation system will be of use to a wide variety of… More

Multi-roller traction drives have several advantages relative to geared units for aerospace and commercial drive applications. Among these are zero backlash, low torque ripple, compactness, light weight, and unlike gears, the potential to operate without liquid or grease lubrication. Current… More

A multi-roller "oil free" traction drive is under development for use on vehicles used in hostile environments like those that will be encountered on planetary surfaces. The drive has been designed to meet the operating requirements of for an Apollo?class Lunar Rover. A drive geometry optimization… More

It is proposed to develop an accurate in-service aircraft engine life monitor system for the prediction of remaining component and system life for aircraft engines. Once proven in the aircraft engine environment, this life monitoring system will be used in a wide variety of airborne and land-based… More

A unique type of air lubricated thrust bearing called a Wave Bearing is proposed to assist a rolling element bearing to carry the thrust load and to improve the bearing's life when used in a micro gas turbine engine. The Wave Bearing technology will provide improved reliability, safety and life… More

A real-time life-use consumption monitor is proposed for aircraft engine systems. The life monitor will process power data available on the aircraft to calculate the accumulating in-flight power loading which the engine experiences. This power loading reduces the available life of the engine. … More

The object of this research is to develop an in-service life-monitor system for the prediction of the remaining component and system life of aircraft engines. The embedded system will monitor the engines thrust, exhaust gas temperature, the engine efficiency, the speed and the time of operation of… More