Today's plane of the day is the SR.53, a british prototype fighter built by Saunders-Roe in the early 50s. The experimental aircraft was built mainly as a way to provide effective and fast interception of the soviet Tupolev Bear bombers. As such a regular turbojet engine of the time was out of the question as the long spool up times would leave the aircraft to waste too much time accelerating slowly before reaching the speed required to intercept these bombers. The solution provided by Saunders engineers was a mix between a regular turbojet engine and a rocket motor, building on the approach at designing a bomber interceptor that Messerschmitt and Bachem had taken only a decade earlier with their Komet and Natter aircraft. However the complexity of the two-engine mix caused a series of setbacks, one of which was an explosion during ground testing with the rocket engine, delaying the first flight further and further. Nevertheless on 16 May 1957 the prototype for the SR.53 did finally take to the skies for the first time and flew, alongside a second prototype called the XD151, a number of test flights during the following months. Test results stated that both prototypes were: "... an extremely docile and exceedingly pleasant aircraft to fly, with very vell harmonized controls". Â Unfortunately the XD151 crashed on take off during a test flight in 1958, striking a concrete approach light while overshooting the runway, exploding and killing its pilot, Squadron Leader John Booth. The remaining prototype the SR.53 continued to fly for a few more missions. Despite its very promising performance and capabilities the concept was eventually scrapped in 1960 following the advent of surface-to-air missile development, the introduction of better turbojet engines as well as numerous advancements in the field of radar technologies.












