The Saben-Hart flying boats brought a response from Peter Green. The consulting engineers put forward their proposals while studying long-term freighter requirements. No detailed design work was done, nor consideration given to the ground (water) handling facilities required by such large aircraft. This drawings is the 470 ft span turbo-prop freighter with a proposed gross weight of 3,000,000 lb, 500 mph cruise and a ton/mile operating cost of 2.75d over 2,000 miles.

Самолёты на фотографии: Aircrafts on the photo: Saben-Hart flying boat - ВеликобританияUnited Kingdom - 1957

The 325 or 353 ft span passenger version in which 606 passengers would cruise at 660 mph for 2d per seat/mile. A 1800 passenger version of the freighter was also proposed. The time however was not right for a relaunch of flying boat principles.

Самолёты на фотографии: Aircrafts on the photo: Saben-Hart flying boat - ВеликобританияUnited Kingdom - 1957