Acro Sport Ace Junior Ace

$1,800 (in 1971) sports aircraft available as plan or kit since the early 1930s

Corben Jr Ace
photo: FlugKerl2

The Ace Junior Ace was designed by Orland Corben as a two-seat sports aircraft and was marketed by the Ace Aircraft Manufacturing Company during the early 1930s for home building.

Acro Sport
United States
1930 to: Onward
US$0.00018 million (1971)


1x Continental C85
85 horsepower
Max Cruise Speed:
113 knots
209 Km/h
Approach Speed (Vref):
49 knots
Travel range:
217 Nautical Miles
402 Kilometers
Fuel Economy:
Service Ceiling:
10,500 feet
Rate of Climb:
600 feet / minute
3.05metre / second
Take Off Distance:
107 metre - 351.05 feet
Landing Distance:
137 metre - 449.47 feet
Max Take Off Weight:
606 Kg
1,336 lbs
Max Landing Weight:
Max Payload:
170 Kg
375 lbs
Fuel Tank Capacity:
24 gallon
91 litre
Baggage Volume:
Seats - Economy / General:
2 seats
Seats - Business Class:
Seats - First Class:
Cabin Height:
Cabin Width:
Cabin Length:
Exterior Length:
6.5 metre - 21.33 feet
Tail height:
2.2 metre - 7.22 feet
Fuselage Diameter:
0.8 metre - 2.62 feet
Wing Span / Rotor Diameter:
7.92 metre - 25.98 feet
Wing Tips:
No Winglets
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The Junior Ace was designed by Paul Poberezny, the founding president of the EAA (Experimental Aircraft Association) organization of aviation enthusiasts based in the United States. It is a lightweight aircraft, designed to be flown simply and needs very little maintenance.

The Junior Ace was piloted by Captain Bud Judy during its maiden flight where it was successful and showcased its shot field capabilities together with low stall speed which is suitable for small landing strips. The aircraft was adapted from the initial Corben Baby Ace so it could make effective use of aircraft engines.

The Junior Ace is of monoplane configuration with a parasol wing supported by cabane struts or a pylon. The wooden wing has a wingspan of 7.92 meters, and spars and ribs are manufactured from spruce. It is also fitted with conventional landing gear of chromoly tube with coil spring shocks which show better responsiveness to trail surfaces.

It is designed with modern wheels and has a wheelbase of 5 meters. The fabric-covered tubular fuselage of chromoly steel tube has been widened with a width of 0.8 meters, an external length of 6.5 meters, and an external height of 2 meters. The aircraft has a tandem cockpit for the pilot and passenger and may be closed off or left open. The tail assembly is of chromoly steel tube. It has a tail height of 2.2 meters.

The two-seat sports aircraft can be powered by a variety of Continental piston engines ranging from 85 hp to 120 hp. The Junior Ace has a maximum speed of 113 knots, a cruise speed of 91 knots, and a travel range of 217 nautical miles. It can fly up to 10,500 feet and can climb at a rate of 600 feet per minute. The takeoff and landing distances are 107 meters and 137 meters, respectively. The aircraft has a maximum takeoff weight of 606 kg, an empty weight of 367 kg, and a maximum payload of 170 kg. The fuel tank capacity is 24 US gal.

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