The orginal of the Hatz biplane goes back 40 years to 1968, when John Hatz from Gleeson, Wisconsin, was looking for a more economical airplane than his OX-5 powered Waco 10. He designed his own biplane while leaning on the lines of the early Waco design.
The fuselage was a relatively simple steel tube frame with a piper cup type landing gear, flat steel tube tail, 4-aileron straight wooden wings and a flat 4 cylinder aircraft engine. That prototype still flies today and more than 200 similar biplanes have since been built.
When Dudley Kelly drew up plans of Jogh Hatz's original design, his version became the CB-1. Several developments from the basic design have evolved in the past. Power has increased from 85hp up to 180hp on several planes.
THE DIFFERENT HATZ BIPLANE'S
John Hatz designed the CB-1 in 1968 as a smaller version of the 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.
The Hatz Classic is a development of the Hartz CB-1. The major differences from the CB-1 are that the fuselage is more round, it mounts a larger engine, uses push-pull tubes instead of control cables for the ailerons, elevators and has aluminum ailrons. As well the seats are relocated in the fuselage and reclined to provide more leg room and comfort with open cockpits and individual windshields. The acceptable power range is 150 to 160hp. The standard engine used is the 150hp Lycoming O-32 powerplant. The Hatz Classic is capable of basic aerobatics, including loops, rolls and hammerheads. The manufacturer estimates the construction time from the supplied kit is 1,000 hours.
Mehlin Smith from Broadhead, Wi, built on the basis of the CB-1 design. The use of 145hp Warner radial engine makes this aeroplane unique. Mehlin decided to lenghten the fuselage tail arm by 8". Mehlin's Hatz is one of the best performing Hatz biplanes flying today.
The Hatz Bantam is an evelution of the Hatz CB-1 biplane. Modified to use the Jabiru 3300 120hp engine. To balance the plane with the lighter 178 lbs. engine, the CB-1 design was lightened and dubbed the "Bantam". The empty weight of the Hatz Bantam has been reduced to approximatley 780 lbs. Setting the gross weight at 1,320 lbs. gives the Bantam a useful load of 540 lbs. and will qualify it to be a "Light Sport" aircraft.
WORK COMPLETED AT D&D CLASSIC