Hatz CB-1
Role	Homebuilt biplane Type of aircraft
Manufacturer	Makelan Corp
Designer	John Hatz
First flight	1968
Introduction	1969
Number built	150 (2011)[1]
Variants	Hatz Classic Kelly-D

The Hatz CB-1 is a 1960s American light biplane designed by John Hatz for amateur construction. The Hatz Classic variant is supplied in kit form by Makelan Corp of New Braunfels, Texas,^[2] while the other variants are available as plans only.^[3]

Design and development

John Hatz designed the CB-1 in 1968 as a smaller version of a Waco F series biplane. The CB-1 is a tandem dual-control two-seat biplane with fixed tailwheel landing gear and powered by a variety of nose-mounted small engines. Steel tube fuselage and tail with wooden wings. Plans and kits of parts for the CB-1 are available for amateur construction.

Variants

CB-1

Base model^[1][4]

Hatz Classic

Designed by Billy Dawson, which has a stretched more rounded fuselage and powered by a Lycoming O-320.^[5]

Kelly-D

A simpler and larger variant of the Hatz, with the wing center section removed, designed by Dudley Kelly.^[1][4]

Hatz Bantam

A lighter model that fits the United States light-sport aircraft rules.^[6]

Specifications (CB-1)

Data from Jane's All the World's Aircraft 1982–83^[7]

General characteristics

• Crew: 2
• Length: 19 ft 0 in (5.79 m)
• Wingspan: 25 ft 4 in (7.72 m)
• Height: 7 ft 10 in (2.39 m)
• Wing area: 178 sq ft (16.5 m²)
• Aspect ratio: 6.06:1
• Airfoil: Clark Y
• Empty weight: 875 lb (397 kg)
• Max takeoff weight: 1,600 lb (726 kg)
• Fuel capacity: 18 US gal (15 imp gal; 68 L)
• Powerplant: 1 × Lycoming O-235 air-cooled flat four, 115 hp (86 kW)
• Propellers: 2-bladed Sensenich fixed-pitch propeller, 5 ft 10 in (1.78 m) diameter

Performance

• Cruise speed: 90 mph (140 km/h, 78 kn) (max cruise)
• Stall speed: 40 mph (64 km/h, 35 kn)
• Never exceed speed: 150 mph (240 km/h, 130 kn)
• Range: 200 mi (320 km, 170 nmi) (30 minute reserves)
• Rate of climb: 800 ft/min (4.1 m/s)