The vertical tail shape was also changed and the rudder tab was replaced by a metal trim strip adjustable only on the ground.
Minor modifications were made to the nose and tail shapes, as well as smaller windows on a shorter pitch.
The characteristic crag and tail shape of the crag reflects this glacial shaping.
Perhaps the reason that tail shapes have wrongly received so much attention in the past is that they are the most obviously visible difference between boards.
This species can be distinguished from other Australian swallows by its tail shape and pale rump.
It also eliminated the spreader bar arrangement of the undercarriage and revised the vertical tail shape.
It measured about 1 m (3.2 ft) in length and its tail shape indicates it was probably a good swimmer.
As with most fish, the tails of sharks provide thrust, making speed and acceleration dependent on tail shape.
Modern hybrid boards are usually 6 feet to 8 feet 6 inches (1.8-2.3 m) in length with a more rounded profile and tail shape.