A comparison of the measured and theoretical values of the pressure 



coefficient on the surface of the axisjmmietric body under consideration is 



given in Figure 4. The theory underpredicts the magnitude of the minimum 



C value slightly; the theoretical trough is not as full as the measured 

 P 



Rl = 9.3x106 



THEORY 

 MEASUREMENT 



Figure 4 - Computed and Measured Stern Pressure Distribution on 



Afterbody 5 



trough. The three measured values of C for — > 0.975 fluctuate somewhat 



P ^ 

 about the theoretical curve for C . These discrepancies are small, and 



P 

 overall agreement between theoretical and measured values of the pressure 



coefficient is considered excellent. 



Readings from a Preston tube, which was taped to the stern surface at 

 the pressure tap locations, were used in conjunction with the steady 

 pressure readings to obtain the shear stress distribution at the body sur- 

 face. The calibration curve, presented by Huang and von Kerczek, for a 



11 



