The Bristol Type 92, sometimes known as the Laboratory biplane, was an aircraft built by the Bristol Aeroplane Company to address the differences between wind tunnel cowling models and full scale cowling for radial engines and was designed as a scaled-up version of a wind tunnel model aircraft.
[1] Barnwell's response was again to design a full-scale aircraft which had the simplifications of a typical wind tunnel model, to which could be fitted any of several cowlings over the Jupiter engine; the Type 92 was the result.
[1] The fuselage was also simple, the structural part being a plywood-covered box girder about 2 ft (61 cm) square from the nose to aft of the second cockpit, where it tapered in plan only to an edge at the tail.
[1] By the end of the 1920s, the problem of cowling radial engines was beginning to be mastered, though it is not clear how much the Type 92 contributed to the solution.
In 1929, the Townend ring appeared, improving the airflow but open enough not to impede cooling; in 1928-9, NACA was releasing and applying the results of very successful tests on closely cowled engines in the 20 ft (6.1 m) diameter Propeller Research Tunnel (PRT).