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The Spezio Sport DAL 1 Tuholer is a two-place low-wing homebuilt aircraft using tube-and-fabric construction. A folding wing is incorporated to allow for trailering.[1]

DAL 1 Tuholer
Role	Sport aircraft Type of aircraft
National origin	United States
Designer	Tony Spezio
First flight	May 2, 1961

Development

The prototype aircraft was built for $287 using tubing from a Cessna UC 78, a Tri-Pacer propeller, wheels from a TG-6 glider, a Lycoming Ground Power unit and a variety of surplus materials. The nickname came from the president of the Experimental Aircraft Association remarking that the plane was a "tuholer".[2] (Link does not work)>

Design

The Tuholer is a tandem two-seat, strut-braced, low-wing, open cockpit aircraft with conventional landing gear. The dual control aircraft can be flown solo rear cockpit only. The fuselage is welded steel tubing with wooden stringers and fabric covering.[3] The dual wing spars are wood, with wood ribs and fabric covering. The fuel tank is made of fiberglass. The horizontal stabilizer uses a Piper Cub style screw jack for trim. The rear headrest can be built streamlined flush with the vertical stabilizer or tapered.[4]

Operational history

The designer flew the prototype 16 years.

Specifications (Spezio Tuholer)

Data from http://www.tuholer.com/speziotuholer.htm

General characteristics

• Capacity: 2
• Length: 18 ft 3 in (5.56 m)
• Wingspan: 24 ft (7.3 m)
• Empty weight: 820 lb (372 kg)
• Gross weight: 1,200 lb (544 kg)
• Powerplant: 1 × Lycoming , 125 hp (93 kW)
• Propellers: 2-bladed

Performance

• Maximum speed: 140 kn (160 mph, 260 km/h)
• Cruise speed: 106 kn (122 mph, 196 km/h)
• Stall speed: 39 kn (45 mph, 72 km/h)
• Range: 350 nmi (400 mi, 640 km)
• Rate of climb: 2,200 ft/min (11 m/s)

References

External links

• http://www.crimsonstar.com/home/hbuilt0.htm
• http://www.planeandpilotmag.com/aircraft/international-aircraft-directory/homebuiltkitbuilt-aircraft/spezio-tuholer.html

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