Frank Marble, among the nation’s preeminent aerospace propulsion scientists during the second half of the 20th century, has passed away at the age of 96. His pioneering technical contributions changed the direction of several important fields that are foundational to both aircraft and rocket systems. However, quite possibly, Frank Marble made even greater contributions to aerospace engineering ...

Computer-generated human models have been used in aerospace design for more than a decade. They have come to be highly reliable for worksite analysis of certain types of EVA tasks. In many design environments, this analysis comes after the structural design is largely complete. However, the use of these models as a development tool is gaining acceptance within organizations that practice good s...

Abstract This paper presents the state of art in electric aircraft propulsion systems. The necessary reduction greenhouse gas emissions on global scale forces aviation engineers to search for ‘green’ solutions. Electric is a potential and relatively intuitive choice flight operations. showcases four architectures systems being now considered utilise advantages with commercially profitable opera...

This paper reports an exploratory experimental cold flow test of the first mode in a multi-mode propulsion concept. A small model of a wallmounted pulse detonation rocket (PDR) ejecting into a duct was fabricated and integrated into the supersonic wind tunnel at the University of Texas at Arlington (UTA). Although supersonic testing proved to be inconclusive, the static tests showed that pulsed...

This paper presents the design of a switched reluctance motor (SRM) for direct-drive propulsion application light sport aircraft. The SRM is designed to replace 70 kW permanent magnet synchronous used in aerospace with similar dimensional constraints. As means achieving high torque density and efficiency, multi-objective framework optimize geometry parameters motor. In order further reduce weig...

This paper presents an overview of various sensorless control methods, with a focus on dual three-phase permanent magnet synchronous machines (DTP-PMSM). Owing to the important role that DTP-PMSMs play in motion-control applications industry, most academic researchers and industry activists seek reduce costs size while increasing capability efficiency motion applications. has led increase numbe...

this paper presents numerical calculations for podded propulsion system using vortex theory and potential panel method. the method discretizes the surface boundary of the body (propeller +pod+strut) and obtained the vortex and propeller surface and potential on strut and pod. a model propeller and strut are considered for these calculations and the results of pressure distribution, flow field a...

A repeated cross-sectional research design was used in this study to compare propulsion biomechanics on a newly developed wheelchair simulator to overground natural propulsion. Seventeen individuals (15 men and 2 women) with spinal cord injury between T4 and T12 completed two 20-meter propulsion trials on a tiled surface and two 1-minute propulsion sessions on the simulator. The main outcome me...