Brooks, George W. <br/>
       AN ANALYSIS OF THE FLAPWISE BENDING FREQUENCIES MODE SHAPES OF ROTOR BLADES HAVING TWO FLAPPING HINGES TO REDUCE VIBRATION LEVELS [NASA TN D-633] 
 / 
 .- Washington, D.C.: National Aeronautics and Space Administration,  1960 
 .- 28p . 
.- ( NASA Technical Note NASA TN D 631-640   
<br/>Bound vol. contains with NASA TN D 631-640 
<br/><u>Subject Headings:</u> <br/>Rotor Blades;
<br/><U>Author Added Entry: </u><br/>Leonard, H Wsyne;
<br><U>Copy Details:</u><br> Acc. No.: <b>TR012762 [D-633]</b>, Full Call No.: ,   Item type:  Technical Report , Location: COMPACT STORAGE (BASEMENT), NASA TN D 631-640<br><b>------------------------- --------------------- ------ --------- ------- ------- --------- -------- </b><br>