Germany's Grob launched the GF 200 four/five
seater to offer a modern, high performance
alternative to the thousands of four/six seater
business aircraft in use worldwide.
Grob's initial design aims with the GF 200 were to
create a comfortable and roomy pressurised four
seater capable of cruising at 420km/h (225kt) at
26,000ft. Power was to be supplied by a Porsche
piston engine, but Grob later switched to the
turbocharged Textron Lycoming TIO540 flat six.
Another powerplant selection switch will see
production aircraft powered by a Teledyne
Continental TSIOL550, also a turbocharged flat
six. A key feature of the GF 200 is its pusher
engine installation.
The engine, which is buried in the airframe and
mounted on the aircraft's centre of gravity,
drives a three blade constant speed propeller via
a carbon fibre reinforced plastic shaft. Grob says
the major advantage of the pusher configuration is
that, unlike tractor aircraft, the airflow over
the airframe is laminar. Grob also claims the GF
200's composite airframe brings significant
benefits in drag reduction compared with
conventional construction.
Other features of the aircraft include its
advanced profile wing with winglets and
retractable undercarriage. The GF 200 was first
conceived in 1983 by Grob's head of design K H
Fischer, whose concept was to apply the company's
extensive knowledge of composite construction to a
new four place high performance four seater. The
project was postponed until 1989 because of
potential difficulties with certificating a
composite aircraft.
Serious design effort resumed with the assistance
of the German Ministry for Research and
Technology, resulting in the unpressurised
prototype's first flight on November 26 1991.
Planned GF 200 developments include the GF 250
pressurised model, the stretched six seat GF
250/6, six seat turboprop powered GF 300 and the
six to eight seat twin turboprop powered
(supplying power through a single driveshaft) GF
350.
Powerplants
GF 200 - One 230kW (310hp) Teledyne Continental
TSIOL550 turbocharged and fuel injected flat six
piston engine driving a three blade constant speed
Mühlbauer propeller.
Performance
GF 200 - Max cruising speed 370km/h (200kt),
economical cruising speed 335km/h (181kt). Max
initial rate of climb 1220ft/min. Max range with
45min reserves 1850km (1000nm).
Dimensions
GF 200 - Wing span 11.00m (36ft 1in), length 8.70m
(28ft 6in), height 3.42m (11ft 3in). Wing area
12.5m2 (134.9sq ft).
GF 200 standard seating for four with bizjet style
leather seats and interior. GF 200/6 to seat six,
GF 300 to seat six, and GF 350 to seat six to
eight.
Weights
GF 200 - Payload 600kg (1323lb), max takeoff
1600kg (3527lb).