After take-off, the pilot was told by radio that the right main gearleg was hanging vertically (from its pivot point) beneath the belly of the aircraft. The pilot made two low passes so that an instructor could inspect the landing gear. The pilot made a normal approach, landed left wing low and endeavoured to hold the right wing up as long as possible. During the initial landing roll, the right main wheel was torn off. At about 20 knots, the right wing dropped and the exposed oleo leg scraped along the ground. The aircraft swung through 90 degrees and came to rest with the right wing-tip on the ground. Investigation revealed an apparent overload failure of the bronze weld securing the threaded collar to the lower right oleo cylinder. The weld had been defective at the time the aircraft was manufactured in 1958, however the aircraft had operated for 2100 hours before the weld had actually failed.