The four sails were made . The originals being slightly different pairs . Those on the inner stock having bays of 3 feet ( 910 mm ) pitch and those on the outer stock having bays of 3 feet 2 inches ( 970 mm ) pitch . It was decided that the new sails would be identical , at the larger pitch . Four 27 feet ( 8 @.@ 23 m ) long whips were cut from a baulk of pitch pine obtained from a demolished maltings at Bury St Edmunds . The whips are 6 inches ( 150 mm ) square at their inner end . Sail bars and uplongs were made from modern pitch pine , selected for quality . The mortices for the sail bars were cut . That at the heel of the sail being at 27 ° and that at the tip being 15 ° , decreasing by 1 ½ ° at each sail bar . Three of the four sails had been completed at the end of the work in .