PAT 3 is the SDS Helicopter and is a helicopter used by Pat Clifton while working at the Special Delivery Service in Pencaster. Its name is written on its fin. It has a single door and no windows, save for a tiny windshield on the front to protect Jess.
It was also used to lift Daisy the cow up a mountain, carry a bouncy castle and save P.C. Selby from being carried away by helium balloons.
Ben had to fly it once to help Pat sort out a problem with a special delivery.