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Spezio DAL-1 Tuholer 
The Spezio DAL-1 Tuholer stems from a design by Tony Spezio in the late 1950s and is said to have been based loosely on the Howard Ike racer of the 1930s. As the Tulioler name implies, it is a two-seat, open cockpit, strutbraced, low-wing taildragger. The original was built using parts collected from various surplus and wrecked sources, and with no hangar space the wings were designed to fold. The first flight of the type occurred on 2 May 1961.
 Spezio Tuholer N9110R
Marketed plans for home-builders. Mechanix Illustrated Golden Hammer Award c.1961 for design.
Engine: Lycoming GO-290-G4, 125 hp
Wingspan: 24’9”
Length: 18’3”
Gross Wt: 1400 lb
Empty Wt: 810 lb
Fuel capacity: 23 USG
Useful load: 590 lb
Top speed 160 mph
Cruise 128 mph
Stall 45 mph
Climb rate 2000 ft
Takeoff run 160 ft
Landing roll 300 ft
Range 400 sm
Ceiling: 12,000 ft
Seats: 2
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