Just flew my new Tom Thumb (5/8 size Tom Boy) and it flies great. It was designed by Vic Smeed and published full size in Aeromodeller in 1957. It was designed for the Albin Bambi
.009 cid. diesel engine. Mine is powered by a Russian repro. which runs better than the
original. Wing span is 22 in. and weight is 2 oz. and it flys just like its big brother, left under
power and right glide. It flew right of the board.
I think your Dad has one of these engines, and if he would like a set of full size plans,
let me know.