Sec. 78.17 MODEL-TESTING PROGRAM FOR A SHIP 



PROPELLER DESIGN DATA 



DIAMETER, D 9-2$ ft PITCH, P AT 070 R 9.08 ft. P/D 0.982 



NO. BLADES, Z 4 ROTATiriN RIGHT HAND DESIGNED rpm 200 



HUB DIAMETER, H 1.667 ft ri/n 0.180 f. m /" 0.238 tg /n 0.0491 



RAKE ANGLE Q deg NATURAL TANGFNT 



REMARKS DESIGNED QR ICI NA LLY FOR SALVAGE VESSEL, U.S. NAVY 



MODEL PROPELLER CHARACTERISTICS 



PROPELLER NO 2294 LABORATORY EMB DIAMETER, D 9.652 jn 



TEST Vq 2.08 to 5 . 50 kt, TEST np 11.29 jn 11.14 rpg l^gxis/D 1088 



DISC ARFA Aq 73.169 jn^ EXP AREA, A[- 36.364 in^ PROJ. AREA, Ap 30.994 jn' 



EXP AREA RATIO Q.497 PROJ. AREA RATIO 0.4 24 



REMARKS ABC SHIP DATA D ^ 20.51 ft , d = 3.696 ft. P^ 20.13 ft. rpm = 115 



BLADE- SECTION DIMENSIONS AND RATIOS 



Trailing Edge 



Leading Edge 

 I. 



Face 

 Base Chord 

 7 Stations 



Entrance Length 3 Stations 



Chord c 



Fia. 78.Ma SNAME PD Sheet fob EMB Model Propeller 2294 



