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In old photos of Delta Golf, what are the black squares on the side of the fuselage for?

April 26, 2017Black Delta fuselage golf photos squares

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In old photos of Delta Golf, what are the black squares on the side of the fuselage for?

1 Answer

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These are tracking marks that were used to help cameras track the aircraft in flight during the flight test programme of the 1970s. At the present time the squares have not been re-applied to Delta Golf at Brooklands but may be added some time on the future.