HIGH EFFICIENCY ULTRA-ENDURANCE ISR UAS POWER GENERATION SYSTEM

ISSI is proposing to develop an efficient power system that can be combined with an existing high L/D UAS airframe to produce an ultra-endurance UAS ideally suited for implementing advanced ISR technologies.Phase I program results highlighted optimization of the energy conversion system for efficiency as a key enabling technology that will allow the ultra-endurance UAS to achieve greater than seven day operation.For the phase II program ISSIs approach will be to use the IDI D902T and optimize the combustion system for this application to improve power generation efficiency.ISSIs goal is to take the stock engines minimum BSFC of 255 g/kW-hr and reduce it by 10%, to less than 230 g/kW-hr.This improvement would correlate to a nearly 10% increase in mission duration for the ultra-endurance UAS.In parallel, ISSI will focus on increasing the delivery capacity of the high-pressure fuel injection system to allow additional power output.ISSIs goal is to improve the power output of the D902T to 40kW at sea level and close to 30kW at 15 kft.In order to improve power output at altitude, a state of the art high-pressure-ratio low-mass-flow turbocharger will be developed and evaluated.