629.1323  / W831e <br/>
Wolf, Thomas L. <br/>
       EFFECT OF TIP VORTEX STRUCTURE OF HELICOPTER NOISE DUE TO BLADE 
 / VORTEX INTERACTION ; REPORT 
 .- Massachusetts: Institute Of Technology,  1978 
 .- 94 . 
.- ( Nasa-Cr-152150, M. I. T. Fluid Dynamics Research Laboratory Report  78-2   
<br/><u>Subject Headings:</u> <br/>Aerodynamic Noise;<br/>Helicopters;<br/>Vortex-Motion;
<br/><U>Author Added Entry: </u><br/>Windall, Sheila E.;
<br><U>Copy Details:</u><br> Acc. No.: <b>A77730</b>, Full Call No.: 629.1323 W831e,   Item type:  Written-off , Location: , <br><b>------------------------- --------------------- ------ --------- ------- ------- --------- -------- </b><br>