Development of this high-performance cruiser started in 1997, and Otto Funk developed the main wing structure with its special Fowler flap system in co-operation with the University of Stuttgart using its laminar wind tunnel. The rest of the airframe was designed by Peter Funk, whereby standard parts of the FK9 Mk3 were used as far as possible. The construction of the Polaris began in 1998 and the prototype of the FK14 was flown first in May 1999.
The FK14 is constructed in a mix of aluminium and fibreglass composite materials. The cockpit area is built of a crash-resilient tubular steel frame. The wings have a composite leading edge, with spars of carbonfibre covered in sheet aluminium.

Production of the airframes takes place in Krosno, Poland; assembly of the airframes and the final production of the aircraft in the factory in Speyer in Germany.

Engine options: Rotax 912 / 912-S
Empty weight: 284kg
Max. demonstrated take off weight: 544 kg
Demonstrated ultimate loads: + 6,4g / -4,0g (520kg)
Wingspan: 9,04 m
Length: 5,69 m
Height: 2,00 m (trigearversion)
Vstall: 35 kt / 40 mph / 64 Km/h
Vne: 157 kt / 180 mph / 290 km/h
Cruise (75%): 235 km/h / 243 km/h
Take off run over 15m obstacle: 205m / 180m
Best climb: 1100 / 1500 ft/min at 145km/h

Engine: Rotax 912, 80 hp
Wing span: 8.8 m
Wing area: 9.0 sq.m
Empty weight: 200 kg
MAUW: 450 kg
Max speed: 290 kph
Minimum speed: 65 kph
Seats: 2

Created by apprentices at the Airbus school at Speyer, the engine is situated behind the pilot and drivs one prop on either side of the fuselage via toothed belts.

Engine: Suzuki Swift, 50 hp
Empty weight: 200 kg
Wing span: 8.8 m
Wing area: 8 sq.m
Fuel capacity: 80 lt
Certification: vVz
MAUW: 450 kg
Seats: 2
Max speed: 280 kph
Cruise speed: 200 kph
Minimum speed: 60 kph
Climb rate: 6.5 m/s
Fuel consumption: 8.5 lt/hr
Price (1998): 75 000 DM
Kit price (1998): 33 000 DM

The FK-Leichtflugzeuge FK-10 is a product of B&F Technik Vertriebs GmbH. The FK10 was designed by Otto Funk as a two-seat version of the FK6 and was built in 1994 in the trainee workshop of the MBB Company in Speyer. A Göbler-Hirth 2704 engine powers this fibreglass ultralight. Just one B&F FK10 was built.

The FK-Leichtflugzeuge FK-9 is a product of B&F Technik Vertriebs GmbH. Production of the airframes takes place in Krosno, Poland; assembly of the airframes and the final production of the aircraft in the factory in Speyer in Germany. Introduced in 1989, the FK9 was a combined design of Otto, and his son Peter.
The 2-seat FK9 utilized the wing concept of the FK6.

To build the FK9 Peter Funk founded in 1990, together with his partner Dirk Breitkreuz, the company B&F Technik. Production of the FK9 Mk.1 begun in the following year. About 40 MLA’s of FK9 Mk 1 version were built until the airplane was re-designed and replaced in production in 1995 by the FK9 Mk 2 version. The FK9 Mark 2 shares its wings with the microlight motor glider FK3, complete with the complex flap and aileron controls, but uses a welded steel spaceframe fuselage. Both the Rotax 503 and 582 are suitable.

The FK9 Mark 2 shares its wings with the microlight motor glider FK3, complete with the complex flap and aileron controls, but uses a welded steel spaceframe fuselage. Both the Rotax 503 and 582 are suitable.

The FK.9 Mk 3 appearened in 1997. The Mark 3 is a Mark 2 with a composite fuselage. The shell is stressed to take a Rotax 912.

By 2010 the Mk.IV was in production. The Mk.IV can have a factor fitted glider tow hook, and folding wings for storage. They can be registed as LSA.

Fk-Lightplanes is the first manufacturer to offer the Mercedes engine system in a serial aircraft. For this the FK9 Smart was created. This design is not just an FK9 fitted with a Mercedes Smart engine. This concept uses the lightweight FK9 Utility airframe, with more sophisticated paintwork and furnishings than the basic version. The streamlined technology implemented includes practical systems and instruments; superfluous details have been deliberately excluded. Configuration and equipment are serial installations but the plane comes ready to fly. This allows a serial price that is below a similarly equipped Rotax FK9.

Gallery

FK9 Mark 2
Empty weight: 190 kg
Wing span: 9.85 m
Wing area: 11.6 sq.m
Fuel capacity: 42 lt
Certification: Vz
Engine: Rotax 503, 50 hp
MAUW: 450 kg
Seats: 2
Max speed: 180 kph
Cruise speed: 165 kph
Minimum speed: 65 kph
Climb rate: 5 m/s
Fuel consumption: 10 lt/hr
Price (1998): 57 000 DM

FK 9 Mark 3
Empty weight: 270 kg
Wing span: 9.85 m
Wing area: 11.6 sq.m
Fuel capacity: 42 lt
Certification: Vz
Engine: Rotax 912, 80 hp
MAUW: 450 kg
Seats: 2
Max speed: 240 kph
Cruise speed: 195 kph
Minimum speed: 65 kph
Climb rate: 5.50 m/s
Fuel consumption: 10.8 lt/hr
Price (1998): 86 500 DM

FK 9 Mk IV
Engine: Rotax 912 / 912-S
Empty weight: 268 kg
Max. demonstrated take off weight: 544 kg
Demonstrated ultimate loads: +6,1 / -3 g (520kg)
Wingspan: 9,85 m
Length: 5,85 m
Height: 2,15 m (trigearversion)
Vstall: 64Km/h
Vne: 230 km/h
Cruise (75%): 192 km/h / 197 km/h
Take off run over 15m obstacle: 220 / 175m
Best climb: 1000 / 1500 ft/min at 95km/h

FK 9 Mk IV Utility
Stall: 35 kt / 40 mph / 64 kmh
Cruise: 106 kt / 122 mph / 197 kmh
VNE: 116 kt / 134 mph / 215 kmh
Empty Weight: 257 kg / 567 lbs
MTOW Weight: 520 kg / 1146 lbs
Climb Ratio: 1500 ft/min / 8 m/s
Take-off distance (50ft obstacle): 570 ft / 175 m