id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
jd472v2654b	Ryan T. Kelly	Numerical Prediction of the Spatial and Temporal Characteristics of the Aero-Optical Disturbance Produced by a Helicopter in Hover	1904		.txt	text/plain	223	8	30	The results indicate that the turbulence of the rotor-tip vortices contributes to the higher order aberrations measured experimentally and that the thermal exhaust plumes effectively limit the optical field-of-regard to forward- and side-looking beam directions. During hover the shed rotor-tip vortices and engine effluence convect with the rotor wake encircling the airframe and subsequently a helicopter mounted optical system.	cache/jd472v2654b.txt	txt/jd472v2654b.txt