country of build
R 90230 RG - One 170kW (230hp) Textron Lycoming IO540C4D5
flat six piston engine (derated from 195kW/260hp) driving
a four blade constant speed Mühlbauer composite propeller.
R 90230 RG - Max speed 324km/h (175kt), max cruising speed
311km/h (168kt), economical cruising speed 267km/h
(144kt). Initial rate of climb 1140ft/min (1650ft/min is
possible). Service ceiling 16,000ft. Max range with
reserves 1610km (870nm). Endurance 7.8hrs.
R 90230 RG - Standard empty 898kg (1980lb), empty equipped
920kg (2030lb), max takeoff 1350kg (2976lb).
Typical seating for four.
The R 90 is an all new four seater that was built in the
early to mid 1990s before Ruschmeyer filed for bankruptcy.
The R 90 was a new design based on the Ruschmeyer's
earlier MF85, making use of a range of modern technologies
and materials. The MF85 series was powered by Porsche
engines, but the unavailability of these powerplants led
to the development of the Textron Lycoming powered R 90.
The Ruschmeyer R 90 possesses an aerodynamically clean
airframe made possible by its glass fibre (with Rohacell
core) construction. The advanced wing design features a
`rain tolerant' laminar flow aerofoil design, wet wing
fuel tanks, upturned wingtips (for increased lateral
stability, not drag reduction), small ailerons and inboard
The initial R 90230 RG production model was powered by a
fuel injected Textron Lycoming IO540 flat six driving an
advanced four blade composite construction propeller. A
silencer on the engine, the four blade prop and the engine
being derated to 170kW (230hp) from 195kW (260hp) combine
to give low interior and exterior noise levels. Even
though the engine has been derated, because of the R 90's
comparatively light structure its performance is quite
All production R 90s were the high performance retractable
undercarriage R 90230 RG. This model first flew on August
8 1988, with German certification awarded in June 1992.
Members of the planned R 90 family include the fixed gear,
175kW (235hp) O540J powered R 90230 FG and the fixed
undercarriage 135kW (180hp) IO360 (flat rated to
150kW/200hp) powered R 90180 FG. The R 90350T RG, to be
powered by a 185kW (250hp) turbocharged engine and capable
of 435km/h (235kt) cruising speed, and the high
performance five/six seat R 95 were also under
development. An Allison 250B17 turboprop powered
development, the R 90420 AT, was also flown.
However Ruschmeyer was forced to file
for bankruptcy in early 1996 and production has ceased.
Approximately 30 R 90-230 RGs were built