The German DFS Meise, renamed Olympia, had already been chosen as the standard aircraft for the abandoned 1940 games and was produced in large quantities in several countries.
A large comfortable cockpit with an upright seat was covered by a canopy made from blown plexiglas, providing excellent visibility but sometimes giving a poor fit.
Constructed entirely of wood with steel fittings the single-spar wings had plywood-covered torsion boxes forming the leading edges, and fabric covering aft of the mainspars.
Two Gull 4s were prepared for the International gliding championships to be held at Samedan in the Swiss Alps in July 1948, joining two Elliott Olympias, and two Weihes from RAF clubs in Germany.
Wills flying the other Gull 4 missed fourth place overall due to a barograph failure during the first day's task, later establishing a British National speed record for the 100 km triangle at 47 km/h (29.2 mph).
Re-built the Australian Gull 4 continued flying until a winch launching accident caused extensive damage, the wreckage is stored at Tocumwal.