Mong MS1 Sport

Mong MS1 Sport
Mong MS1 Sport
Role Homebuilt Biplane
National origin United States of America
Designer Ralph Mong
First flight May 1, 1953
Introduction 1953
Number built approximately 200[1]
Variants Green Sky Adventures Micro Mong

The Mong MS1 Sport is an early original homebuilt biplane design from the 1950s. Over 400 sets of planes for the aircraft have been sold.[2]


Design and development

The first Mong Sport was built as a personal aircraft by the designer Ralph Mong, Jr, and plans for homebuilding were provided afterward, due to demand.[3]

The original biplane was built around a Continental A65 65 hp (48 kW) engine. The biplane has the unique feature of a single lift strut placed directly forward of the pilot. At a sacrifice of forward visibility, the biplane did not require expensive, drag producing support wires. The fuselage is steel tube with aircraft fabric covering.[3]

Operational history

In the mid 1960s, a biplane class was added to the Reno Air Races. The Mong Sport met the basic qualifications, and has been extensively modified over the years by builders to be used as a biplane racer. The Mongster won the 1968 Biplane class of the Reno National Championship.[4] Long Gone Mong won in 1987 and 1989. A highly modified Mong Phantom with carbon fiber wings won in 2006 with a speed of 251.958 mph.[5]


Green Sky Adventures Micro Mong
An ultralight designed by Ed Fisher at the suggestion of Ralph Mong in 1993. In 1996 Ed Fisher acquired the rights to the Mong Sport aircraft.

Aircraft on display

A Mong Sport is on display at the Octave Chanute Aerospace Museum and the EAA AirVenture Museum.[3]

Specifications (Mong MS1 Sport)

Data from EAA

General characteristics

  • Length: 14 ft 1 in (4.29 m)
  • Wingspan: 16 ft 10 in (5.13 m)
  • Wing area: 80 sq ft (7.4 m2)
  • Empty weight: 550 lb (249 kg)
  • Gross weight: 970 lb (440 kg)
  • Fuel capacity: 16 US gallons (61 litres)
  • Powerplant: 1 × Continental A65 , 65 hp (48 kW)


  • Maximum speed: 100 kn; 185 km/h (115 mph)
  • Cruise speed: 96 kn; 180 km/h (110 mph)

See also

Aircraft of comparable role, configuration and era
  • Knight Twister
  • Smith Miniplane


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