This glider was designed in Canada in 1947 by Waclaw Czerwinski and Beverley Shenstone in response to British Gliding Association competition for a high-performance, two-seater sailplane. Two aiframes were built : one in the U.K. (begun in 1949 and first flight was in 1958) and second in Canada. Construction in Canada started in 1949 and finished in 1975. Between 1975 and 1977 over 30 flights were made, the longest being over three hours. The aircraft flew a total of 25 hours and 45 minutes.