182 



THE BELL SYSTEM TECHNICAL JOURNAL, JANUARY 1952 



Region I — Complete initial front series for 1 < Q < l/k. Within this 

 region, if M12 > —^ — ; — ^^ j. > the maximum rebound occurs during the 



1 +P12/ 



first bounce and 



2CFi = 



(1 - Mn)h' 



(28) 



1 + P12/ 



If the maximum rebound occurs later, it must occur during a com- 

 plete heel series which follows the initial complete front series. From 

 Equations (21) and (26) 



2C7i = M'n (29) 



By comparing Equations (28) and (29), the critical requirement 



0.30 



5 0.12 



01 23456789 10 



P,2f 



Fig. 5— Relative maximum rebound amplitude for M12 = 1/2.5. 



