Mono Aircraft Monoprep

Monoprep 218
1929-built Monoprep 218 displayed at the Air Power Museum, Ottumwa, Iowa in June 2006
General information
Typelight sporting monoplane
National originUnited States
ManufacturerMono Aircraft
Primary userprivate pilot owners
Number builtcirca 68
History
First flight1927

The Mono Aircraft Monoprep was an American light civil sporting monoplane of the late 1920s.

Development and operation

Mono Aircraft was founded in 1927 and their first design was the Monoprep high-wing sporting two-seat open cockpit monoplane. Eight Monopreps were built.

The improved Monoprep 218 followed the initial model in 1929, with a 3 ft (1 metre) shorter wingspan giving increased speed. 84 Monoprep 218s were built by 1930. One long-nosed aircraft was used to test one of the two Lambert H-106 engines during 1930.[1]

The sole surviving example of the Monoprep 218 NC179K was publicly displayed in airworthy condition in the Airpower Museum at Ottumwa Iowa.[2] It has now changed into private hands and is under restoration to fly again.

Specifications (Monoprep 218)

Data from U.S. Civil Aircraft Vol. 3 (ATC 201–300)[3]

General characteristics

  • Crew: 2
  • Length: 21 ft 0 in (6.40 m)
  • Wingspan: 32 ft 0 in (9.75 m)
  • Height: 6 ft 3 in (1.91 m)
  • Wing area: 143 sq ft (13.3 m2)
  • Airfoil: Clark Y
  • Empty weight: 783 lb (355 kg)
  • Gross weight: 1,288 lb (584 kg)
  • Fuel capacity: 15 US gal (12 imp gal; 57 L)
  • Powerplant: 1 × Velie M-5 5-cylinder radial engine, 55 hp (41 kW)

Performance

  • Maximum speed: 92 mph (148 km/h, 80 kn)
  • Cruise speed: 80 mph (130 km/h, 70 kn)
  • Stall speed: 37 mph (60 km/h, 32 kn)
  • Range: 290 mi (470 km, 250 nmi)
  • Service ceiling: 9,000 ft (2,700 m)
  • Rate of climb: 680 ft/min (3.5 m/s)

References

Notes
  1. ^ "Mono, Monocoupe". Aerofiles. May 13, 2008. Retrieved January 3, 2026.
  2. ^ Ogden 2007, p. 263.
  3. ^ Juptner 1966, p. 57.
Bibliography
  • Juptner, Joseph J. (1966). U.S. Civil Aircraft Vol. 3 (ATC 201–300). Fallbrook, California, US: Aero Publishers, Inc.
  • Ogden, Bob (2007). Aviation Museums and Collections of North America. Air-Britain (Historians) Ltd. ISBN 978-0-85130-385-7.
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