The production of the FK14 and FK12 line is currently „on hold“ to provide
us more manufacturing-capacities to produce our new FK9 Mk VI version.
We hope to be able to restart these lines again within year 2025. Before
that we are unable to provide closer information or price offers.
© 2025 fk-aircraft.com
FK12 Comet
FK12 Comet
The only light sport biplane in serial production in the world, handcrafted for pure flying pleasure. In addition to its modern design, the Comet is outstanding due to many facts, one being that it is the fastest biplane in the world regarding the speed to power ratio. Another unique feature for a biplane is the ability to fold back the wings within minutes and tow the plane home for storage. The cockpit of the Comet can be converted into many different configurations, such as: ► both seats open cockpit, ► both seat closed cockpit „Double Canopy“ ► single rear „Race Canopy” with front cockpit covered. There is simple access to both seats as the cockpit fairing can be opened as one complete unit. The Comet offers two compartments for your travel gear. A modern, full flaperon system gives the Comet its high agility, while offering a good low speed handling characteristic, which allows a safe landing even for the average skilled pilot with some taildragger experience. The Comet is definitely the FK design which has been stressed to the highest level during load tests and flight analysis. The wing load tests for example had been driven far beyond the required test limits up to +16/-8 gs (@450kg Aerobatic MTOW), beside all other tests to meet the basic acrobatic FAR23 load requirements. The crew is protected by an inert gas welded steel frame structure, which is very robust and easy to repair. Remark: When registered as ultralight aircraft in some European countries, acrobatic maneuvers can be prohibited even if the aircraft itself is designed and build for it. TECHNICAL SPECIFICATIONSDIMENSIONS
Wing span 6,4 m Length 5,9 m Height 2,0 mWEIGHTS
Empty weight in base configuration 290 - 330 kg Demonstrated ultimate loads +12,7 g / -7,9 g (@450 Kg) Max. take off weight 540 kgPERFORMANCE
Vne 253 km/h Vstall 65 - 75 km/h Cruise (75%) 185 km/h Best climb / at 4,5 - 7,0 m/sFUEL
Total capacity 58 ltr Optional add wingtanks 2 x 18 ltrCOCKPIT
► Comfort interior cotton style or leather ► Floor covering setSYSTEMS
► Hydraulic disc brake system ► Diffuser style cooling system ► Mechanical elevator trim ► Streamlined wing wires with end fairings ► Elevator fuselage intersection fairing set ► Optional cabin heat system ► Stall warning indicatorPANEL
► Air speed indicator ► Altimeter (5000 ft) ► Compass ► Slip Indicator ► Oil pressure and oil temperature ► CHT ► RPM indicator gaugePOWERPLANT & PROPELLER
► Rotax 912 ULS (100hp) or UL POWER 350iS (130hp) , other engine types on demand ► 3-blade Carbon or two blade wood, fix pitch or constant speedAIRFRAME
► standard airframe with open cockpits ► new flaperon type for increased roll rate ► Wheel fairings ► 58 ltr PE fuselage tank including drain valve ► Wing folding mechanism including external wing locking mechanism ► Elevator fuselage intersection fairing set ► Profiled elevator struts set ► Tailplane with additional acrobatic wirings (removable) ► 3 different and exchangeable canopy versions available ► Different paint scheme and decoration sets are availableMANY OPTIONS AVAILABLE
FK12 Comet
FK12 Comet
The only light sport biplane in serial production in the world, handcrafted for pure flying pleasure. In addition to its modern design, the Comet is outstanding due to many facts, one being that it is the fastest biplane in the world regarding the speed to power ratio. Another unique feature for a biplane is the ability to fold back the wings within minutes and tow the plane home for storage. The cockpit of the Comet can be converted into many different configurations, such as: ► both seats open cockpit, ► both seat closed cockpit „Double Canopy“ ► single rear „Race Canopy” with front cockpit covered. There is simple access to both seats as the cockpit fairing can be opened as one complete unit. The Comet offers two compartments for your travel gear. A modern, full flaperon system gives the Comet its high agility, while offering a good low speed handling characteristic, which allows a safe landing even for the average skilled pilot with some taildragger experience. The Comet is definitely the FK design which has been stressed to the highest level during load tests and flight analysis. The wing load tests for example had been driven far beyond the required test limits up to +16/-8 gs (@450kg Aerobatic MTOW), beside all other tests to meet the basic acrobatic FAR23 load requirements. The crew is protected by an inert gas welded steel frame structure, which is very robust and easy to repair. Remark: When registered as ultralight aircraft in some European countries, acrobatic maneuvers can be prohibited even if the aircraft itself is designed and build for it. TECHNICAL SPECIFICATIONSDIMENSIONS
Wing span 6,4 m Length 5,9 m Height 2,0 mWEIGHTS
Empty weight in base configuration 290 - 330 kg Demonstrated ultimate loads +12,7 g / -7,9 g (@450 Kg) Max. take off weight 540 kgPERFORMANCE
Vne 253 km/h Vstall 65 - 75 km/h Cruise (75%) 185 km/h Best climb / at 4,5 - 7,0 m/sFUEL
Total capacity 58 ltr Optional add wingtanks 2 x 18 ltrCOCKPIT
► Comfort interior cotton style or leather ► Floor covering setSYSTEMS
► Hydraulic disc brake system ► Diffuser style cooling system ► Mechanical elevator trim ► Streamlined wing wires with end fairings ► Elevator fuselage intersection fairing set ► Optional cabin heat system ► Stall warning indicatorPANEL
► Air speed indicator ► Altimeter (5000 ft) ► Compass ► Slip Indicator ► Oil pressure and oil temperature ► CHT ► RPM indicator gaugePOWERPLANT & PROPELLER
► Rotax 912 ULS (100hp) or UL POWER 350iS (130hp) , other engine types on demand ► 3-blade Carbon or two blade wood, fix pitch or constant speedAIRFRAME
► standard airframe with open cockpits ► new flaperon type for increased roll rate ► Wheel fairings ► 58 ltr PE fuselage tank including drain valve ► Wing folding mechanism including external wing locking mechanism ► Elevator fuselage intersection fairing set ► Profiled elevator struts set ► Tailplane with additional acrobatic wirings (removable) ► 3 different and exchangeable canopy versions available ► Different paint scheme and decoration sets are availableMANY OPTIONS AVAILABLE
© 2025 fk-aircraft.com
The production of the FK14 and FK12 line is currently „on hold“
to provide us more manufacturing-capacities to produce our
new FK9 Mk VI version.
We hope to be able to restart these lines again within year
2025. Before that we are unable to provide closer information
or price offers.
FK12 Comet
FK12 Comet
The only light sport biplane in serial production in the world, handcrafted for pure flying pleasure. In addition to its modern design, the Comet is outstanding due to many facts, one being that it is the fastest biplane in the world regarding the speed to power ratio. Another unique feature for a biplane is the ability to fold back the wings within minutes and tow the plane home for storage. The cockpit of the Comet can be converted into many different configurations, such as: ► both seats open cockpit, ► both seat closed cockpit „Double Canopy“ ► single rear „Race Canopy” with front cockpit covered. There is simple access to both seats as the cockpit fairing can be opened as one complete unit. The Comet offers two compartments for your travel gear. A modern, full flaperon system gives the Comet its high agility, while offering a good low speed handling characteristic, which allows a safe landing even for the average skilled pilot with some taildragger experience. The Comet is definitely the FK design which has been stressed to the highest level during load tests and flight analysis. The wing load tests for example had been driven far beyond the required test limits up to +16/-8 gs (@450kg Aerobatic MTOW), beside all other tests to meet the basic acrobatic FAR23 load requirements. The crew is protected by an inert gas welded steel frame structure, which is very robust and easy to repair. Remark: When registered as ultralight aircraft in some European countries, acrobatic maneuvers can be prohibited even if the aircraft itself is designed and build for it. TECHNICAL SPECIFICATIONSDIMENSIONS
Wing span 6,4 m Length 5,9 m Height 2,0 mWEIGHTS
Empty weight in base configuration 290 - 330 kg Demonstrated ultimate loads +12,7 g / - 7,9 g (@450 Kg) Max. take off weight 540 kgPERFORMANCE
Vne 253 km/h Vstall 65 - 75 km/h Cruise (75%) 185 km/h Best climb / at 4,5 - 7,0 m/sFUEL
Total capacity 58 ltr Optional add wingtanks 2 x 18 ltrCOCKPIT
► Comfort interior cotton style or leather ► Floor covering setSYSTEMS
► Hydraulic disc brake system ► Diffuser style cooling system ► Mechanical elevator trim ► Streamlined wing wires with end fairings ► Elevator fuselage intersection fairing set ► Optional cabin heat system ► Stall warning indicatorPANEL
► Air speed indicator ► Altimeter (5000 ft) ► Compass ► Slip Indicator ► Oil pressure and oil temperature ► CHT ► RPM indicator gaugePOWERPLANT & PROPELLER
► Rotax 912 ULS (100hp) or UL POWER 350iS (130hp) , other engine types on demand ► 3-blade Carbon or two blade wood, fix pitch or constant speedAIRFRAME
► standard airframe with open cockpits ► new flaperon type for increased roll rate ► Wheel fairings ► 58 ltr PE fuselage tank including drain valve ► Wing folding mechanism including external wing locking mechanism ► Elevator fuselage intersection fairing set ► Profiled elevator struts set ► Tailplane with additional acrobatic wirings (removable) ► 3 different and exchangeable canopy versions available ► Different paint scheme and decoration sets are availableMANY OPTIONS AVAILABLE
© 2025 fk-aircraft.com
The production of the FK14 and FK12 line is
currently „on hold“ to provide us more
manufacturing-capacities to produce our new
FK9 Mk VI version.
We hope to be able to restart these lines again
within year 2025. Before that we are unable to
provide closer information or price offers.
