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The Armstrong Siddeley Sapphire jet engine test bed performs for the crowd using only its two outer motors, the inner Merlins being shut down. This is believed to have been the last Lancastrian to survive in service. No example of the type survives.
This photo is copyright © R.A.Scholefield, and may not be used or published in any way without permission.
It was added on 22 January 2018, and has since been viewed 444 times.