The Acro Sport II is developed by Paul Poberezny in the 1970s as a two-seat aerobatic sportsplane for amateur construction. It is a two-place larger variant of its predecessor, single-place Acro Sport I. The aircraft is designed to be fitted with Lycoming engines rated at 115 to 200 horsepower.
On July 9, 1978, the Acro Sport II took to the air for the first time. The Acro Sport II is designed by an American aviator and aircraft designer Paul Poberezny in the 1970s for amateur construction, following the single-place Acro Sport I. It is a shortspan biplane larger than its antecedent.
The aircraft has been licensed in the Experimental aircraft category by the Federal Aviation Administration. The Acro Sport II features a tailwheel-type landing gear and usually designed with an open flight deck and spatted main landing gear.
The wide undercarriage has larger wheels with a wheelbase of 4 meters. The entire aircraft is covered in fabric from Stits Polyfiber. The steel tube fuselage has an external length of 5.75 meters, an external height of 1.7 meters, a diameter of 0.85 meters.
It has a tail height of 2.03 meters. The wooden wing from Aircraft Spruce has a wingspan of 6.60 meters and a wing area of 14.12 square meters. The cockpit can accommodate up to around 110 kg. It is of tandem configuration for a cockpit and a passenger. The enlarged airframe was designed to carry more baggage.
The aircraft is powered by a single carbureted Lycoming O-360 engine. It is a four-cylinder, dual magneto, horizontally-opposed, piston engine with a wet sump oil system and an air-cooling system. The engine produces a maximum takeoff thrust of 180 horsepower. The Acro Sport II has an empty weight of 397 kg and a maximum takeoff weight of 690 kg.
The maximum payload is 210 kg and the fuel tank capacity id 30 US gallons. It has a maximum speed of 132 knots, a cruise speed of 107 knots, and a stall speed of 46 knots. The travel range is 370 nautical miles. It could climb up to 20,000 feet and could climb at a rate of 1,200 feet per minute. The takeoff distance is 340 meters while the landing distance is 300 meters.
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