 The " thousand tonners " were the 26 United States Navy destroyers of five classes — Cassin , Aylwin , O 'Brien , Tucker , and Sampson — so named because they were the first U.S. Navy destroyers to have displacements greater than 1 @,@ 000 long tons . The Cassin class , the first of the thousand tonners , displaced about a third more than the preceding Paulding class . The introduction of the thousand tonners led to the Pauldings and other older , smaller displacement destroyers of previous classes to be dismissively called " flivvers " , a nickname also commonly applied to the Ford Model T. 
 The " thousand tonners " <a href='uninflect' title='1'><mark>were</mark></a> the 26 United States Navy destroyers of five classes — Cassin , Aylwin , O 'Brien , Tucker , and Sampson — so named because they <a href='uninflect' title='2'><mark>were</mark></a> the first U.S. Navy destroyers to have displacements greater than 1 @,@ 000 long tons . The Cassin class , the first of the thousand tonners , displaced about a third more than the preceding Paulding class . The introduction of the thousand tonners led to the Pauldings and other older , smaller displacement destroyers of previous classes to be dismissively called " flivvers " , a nickname also commonly applied to the Ford Model T. 
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