Helmy Aerogypt

Found this reference when browsing a site dedicated to Douglas Motorcycles.

Wikipedia:
The Helmy Aerogypt was a British four-seat cabin monoplane designed and built by Egyptian S Helmy at Heston Aerodrome in 1938. The Aerogypt I was a low-wing cantilever monoplane powered initially by three 22hp (16kW) Douglas Sprite engines. The aircraft had an upward hinged roof which acted as a landing flap. Registered G-AFFG it first flew in 1939 and later had the hinged roof removed and was re-designated the Aerogypt II, another modification added end plates to the horizontal tail surfaces and was re-designated the Aerogypt III and last flown in that configuration in September 1940.[1]

In 1943, the aircraft was modified as the Aerogypt IV with a tricycle landing gear and two 65hp (48kW) Continental A65 engines. It was flown from White Waltham Airfield, but in November 1946 it was damaged beyond repair when it was dropped by the recovery crane following a landing accident at RAF Northolt.[2]

Query: Was the “upwards hinged roof” concept ever used in any other aircraft as a landing flap? (the Vought F-8 Crusader used a variable incidence wing that incorporated a portion of the upper fuselage).