There was also that utter abortion - the Saro Lerwick twin-engined flying boat. Known as the 'Sinking Pig', it both looked and flew like a pig. It was unstable and lacked adequate control authority - on one engine it could neither maintain height nor heading, but would descend in gradual circles until meeting the surface. It also had what was described as a vicious stall. Around 50% of the wretched things were lost in accidents...