Saunders-Roe SR.A/1
One. The Saunders-Roe SR.A/1 was a revolutionary, water-based aircraft with a top speed in excess of 500 mph. Construction began in 1946 to produce this single-seater, twin jet-propelled flying boat fighter. It had no official name and was referred to as the "Squirt" but the project came to an end in the early 1950s as the Squirt lost out in the competition with the new land-based jet fighters that were appearing on the scene plus the success in war of the aircraft carrier. Shown here is one of the three prototypes (TG263) with the initial Perspex bubble canopy. It had two Metropolitan-Vickers F.2/4 Beryl axial flow turbojets placed side by side in the fuselage and sharing the same nose air intake but with separate exhausts. Surprisingly, it is said that there was no problem with water ingestion but the SR.A/1 was not designed to operations in choppy seas.
Two. The first test flight took place on 16th July 1947 and the test pilot Geoffrey Tyson reported satisfactory handling of the flying boat both in the air and on water. Here, the flying boat is just sitting on the step of the planing hull.
Three. The SR.A/1 had semi-retractable floats to improve the aerodynamics. Each float first pivoted inwards through 90° before the arm folded into a well in the lower surface of the wing. This way, only the streamlined part of each float was exposed. In the first photograph, we can see the two dark bands of the pivoting mechanism on each float. In the lower photograph, we can see the orifice for the planed four nose-mounted Hispano 20mm cannons.
Four. TG263 was brought out of store in November 1950 and hydrodynamic tests recommenced, the last flight being in June 1951. Here we can see the underwing recess on the port wing and the float pivot points as two dark areas on the starboard float.
Five. After the initial trials, several modifications were made including replacement of the Perspex bubble canopy with a metal canopy and reducing the rudder horn balance as can be seen in this photograph. A short take-off could be attained - 26 seconds - by retracting the wing floats, and so reducing drag, once the aircraft had lateral stability.
One. Verso: "SR A1" in black ink
Two. Verso: "Britain has first jet flying boat fighter. 30.7.47. The first jet-propelled flying boat fighter in the world - the Saunders-Roe A1 - was successfully tested at Cowes, Isle of Wight, this afternoon. It is fitted with twin Metropolitan Vickers jet units known as the Beryl, but its maximum speed is a top secret. The picture shows the jet-propelled flying boat taking off on her trial flight to-day."
Three. Verso: "First flying boat tested. 31.7.47. The world's first jet-propelled flying boat fighter, the Saunders-Roe SR/A1 made its first …. appearance over the Solent yesterday, after …."hush-hush" test flights. It has ….a speed of more than 400m.p.h….in a pressurised cabin, and it….cannon. The pilot has an ejector seat."
The source of all the post text above and pictures : Naval Aviation
Images - catalogue number 96095, 31008, 66039, 95038 & 94090