Aviation Historian 18
P.Jarrett - Hillson's Horrible Helvelynn
The plywood-covered Hillson Praga was powered by either a 36 h.p. Praga B or a 40 h.p. Aeronca JAP, and seated two side-by-side in an enclosed cockpit. Praga G-AEON is seen here at the A&AEE at Martlesham Heath in 1936.
The only known photograph of the unlovely Hillson Helvellyn.