sentences:  In reaction to the success of the light displacement designed of Davidson, Bruce Farr and Paul Whiting, the IOR bought in new rules which required extensive surgery of "Waverider" to bring her into class for the 1979 Half Ton Cup series, which "Waverider" won, becoming the first yacht to ever win the Half Ton Cup twice.After the success of "Waverider".John MacLaurin commissioned "Pendragon" a Three-Quarter-tonner development of and big sister to "Waverider".