An Ex-TUI Boeing 757 has gone to Britain’s 2Excel Aviation to be used as a flying testbed for the Tempest future combat aircraft development work. Delivered on the 11th Nov to 2Excel’s MRO facilities at Lasham, it will undergo conversion work that will enable it flight test avionics and sensors for the UK combat aircraft program. One of the oldest fleet members which my son will not be flying having just been hired by TUI after the TC collapse.
These types of testbed conversion with older larger aircraft have been done for years. I remember going to Farnborough as a boy and seeing a Lancastrian with a Double Mamba that later powered the Gannet on its nose. It shut down all four of it own engines and did a flypast using just the test engine on the nose.
discovery.nationalarchives.gov.uk
The US’s NT-43A a Boeing 737 tested various airborne Radars on stealth coatings of early prototypes.
Boeing 757 Catfish doing F-22 developmental work.
China’s J-20 test bed seen at The Yan Liang Flight Testing Facility in the outskirts of Xian is a highly modified Russian-built TU-204C that is almost a copy of the US ‘Catfish’
defence-blog.com
These types of testbed conversion with older larger aircraft have been done for years. I remember going to Farnborough as a boy and seeing a Lancastrian with a Double Mamba that later powered the Gannet on its nose. It shut down all four of it own engines and did a flypast using just the test engine on the nose.
Bitteswell Flight Testing (A History) | The National Archives
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The US’s NT-43A a Boeing 737 tested various airborne Radars on stealth coatings of early prototypes.
Boeing 757 Catfish doing F-22 developmental work.
China’s J-20 test bed seen at The Yan Liang Flight Testing Facility in the outskirts of Xian is a highly modified Russian-built TU-204C that is almost a copy of the US ‘Catfish’

China PLAAF Yanliang Tu-204C canards as J-20 radar testbed
China PLAAF Yanliang Tu-204C canards as J-20 radar testbed A PLAAF Tupolev Tu-204 testbed aircraft was seen featuring a J-20 nose cone. It is believed to house the Type 1475 (KLJ-5) active electron…
