The Pitbull II is a two-seat development of the North American Rotorwerks Pitbull Ultralight. It was designed to comply with the US Experimental - Amateur-built rules. It features a single main rotor, a two-seats in side-by-side configuration open cockpit with a windshield, conventional landing gear and a four-cylinder, air and liquid-cooled, four-stroke, dual-ignition 1000NaN0 Rotax 912S engine in tractor configuration. The 1100NaN0 Subaru EA-81 and Subaru EA-82 auto-conversion powerplants are optional.
The aircraft's rotor has a 301NaN1 diameter and the cockpit has a 400NaN0 width. The tailplane is strut-braced and an electric pre-rotator is standard. A small baggage compartment with a capacity of 201NaN1 and a volume of 21NaN1 is fitted. The recommended power range is 90to. With its empty weight of 4400NaN0 and a gross weight of 10250NaN0, the useful load is 5850NaN0. Construction time from the factory assembly kit is estimated at 100 hours.
The aircraft is intended to resemble the autogyros of the 1930s and as such it uses a radial engine-style round cowling, rounded rudder, barrel-shaped fuselage and other antique styling details.