Sec. X4.4 



USEFUL DATA FOR ANALYSIS AND COMPARISON 



929 



TABLE X4.C— Continued 



by the David Taylor Model Basin from data 

 assembled for towing-carriage design. 



X4.4 Conversion Ratios, English-Metric and 

 Metric-English. Conversion factors for English- 

 metric and metric-English calculations, as well 

 as ratios between certain units in the English and 

 metric systems, are given in Figs. X4.A through 

 X4.F for length, volume, hnear velocity, weight, 

 pressure, and power, respectively. These diagrams 

 follow the general scheme of those pubhshed 

 in a "Handbook of Engineering Fimdamentals," 

 edited by 0. W. Eshbach, Wiley, New York, 

 second edition, 1952, pages 1-148 through 1-159. 



Fig. X4.G contains five sets of Enghsh-metric 

 and metric-English conversion graphs, reproduced 

 from "Problems of Polar Research," edited by 

 W. L. G. Joerg [American Geogr. Soc, Sp. 

 Publ. 7, 1928, p. 458], from which values within 

 certain ranges may be picked off by inspection. 



Other standard English-metric conversion ratios 

 are: 



(a) The U. S. legal yard is 3600/3937 meter 



(b) The U. S. legal pound mass is 0.453592 kg 



(c) The acceleration of gravity, corresponding to 

 32.174 ft per sec^ is 9.80665 meters per sec^ 



LINEAR VELOCITY 



Fig. X4.C Conversion factors for Linear Velocitt 



Fig. X4.D Conversion Factors for Weight 



