Hagiwara Glider Co Horikawa H-23B-2
The prototype of this tandem two-seat training sailplane flew on September 10, 1956 and at least eight more were flying by 1961.
Construction is similar to that of the H-22B-3.
Span: 43 ft 2 in
Length: 23 ft 4 in
Wing area: 185 sq.ft
Gross weight: 838 lb
Empty weight: 463 lb
Max L/D: 18 at 42.5 mph
Min sink: 3.6 ft/min at 38.5 mph