IMAER engines are Volkswagen conversions built by the Industria Mecânica E Aeronáutica LTDA of Botucatu, Sao Paulo, Brazil. The firm was originally known as Retimotor Engenharia, also of Botucatu, with the name change in 1988. VW O-123 engines were converted into a few models by IMAER from about 1984 until 1993, including two-cylinder 1/2 VW conversions. Most of the engines used aviation fuel or autogas, but an early goal of the engine development was to establish the feasibility of using alcohol fuel distilled from sugar-cane waste. However, the promise of an 8-10% increase in power could not be achieved. A later Brazillian firm, Aeroálcool, is continuing to pursue the objective of using alcohol as an aircraft engine fuel.
O-61 - - {3.559 / 3.087 / 61.4} / {90.4 / 78.4 / 1006}
Same bore and stroke as O-123.
2cyl; Retimotor RM-100-A, IMAER 1000 M1; 38-47hp@3600rpm; 1984-1993; Wt = 86-88#.
Carbureted engine with single magneto ignition. VW parts were used with new crankcases, crankshafts, and cylinder heads.
BGP; J84-85toJ92-93.
Applications: None found.
2cyl; IMAER 1000 E1; 38-47hp@3600rpm; 1988-1993; Wt = 86-88#.
As 1000 M1, but with single electronic ignition.
BGP; J88-89toJ92-93.
Applications: None found.
O-123 - - {3.559 / 3.087 / 122.8} / {90.4 / 78.4 / 2013}
Same bore and stroke as O-61.
4cyl; Retimotor RM-200-Z (also, RWV-1), IMAER 2000 M1; 80hp@3400rpm; 1983-1993; Wt = 172-179#.
Carbureted engine with single magneto ignition and a new, special crankshaft; certificated in Brazil under European JAR 22 rules.
BGP; J84-85toJ92-93.
Applications: (Brazil) Paulhistinha 56; Super Rotor AC.4 gyroplane.
4cyl; IMAER 2000 ME1; 80hp@3400rpm; 1988-1993; Wt = 172-179#.
As 2000 M1, but with dual electronic ignition.
BGP; J88-89toJ92-93.
Applications: None found.