Monnet Sonex / Subsonex JSX-1 Sonex Ltd Sonex / Subsonex JSX-1 ![]()
The SubSonex jet aircraft prototype, JSX-1, made its first flight on August 10, 2011 at Wittman Airport in Oshkosh, Wisconsin. Piloted by Bob Carlton, the flight lasted approximately 14 minutes and focused on low-end speed, including stalls and low approaches in the landing configuration. The engine selected for the SubSonex is the Czech-built PBS TJ-100 turbojet.
![]() Through the course of a series of high-speed taxi tests, Sonex design team has identified some issues with controllability of the aircraft in the transition phase approaching takeoff speeds, and has decided to enter a thorough design review process aimed at making the aircraft easier to handle for the average recreational pilot.
The Subsonex originally sported a tandem landing gear with outrigger gear on each wing tip. Due to the increased power offered by the new PBS TJ-100 engine selected for the SubSonex, it was determined that a tricycle gear configuration would be needed to increase yaw stability on the ground in the transition phase approaching takeoff speeds.
During Air Venture 2010, it was presented with the new fixed tricycle landing gear and the PBS TJ-100 turboJet engine.
![]() Subsonex JSX-1
Sonex
Engine: 80 hp 2180 AeroVee
Wing span: 22 ft
Wing Area: 98.0 sq. ft.
Length: 17.5 ft
Tail Height (Std Gear): 56"
Tail Height (Tri-Gear): 74"
Main Gear Width: 71" (with wheel pants)
Air Foil: 64-415
Cockpit Width: 40 in.
Fuel Capacity: 16 US Gal.
Empty Weight (average): 620 lbs.
Range: 550 miles
Cruise Speed @ Sea Level: 130 mph
Cruise Speed @ 8000 ft (TAS): 150 mph
Power Loading (GW/HP): 13.125
T.O. Distance: 400 ft
Landing Distance: 500 ft
Max Flap Extended Speed (Vfe): 100 mph / 161 km/h
Maneuvering Speed: 125 mph / 201 km/h
Never Exceed Speed (Vne): 171 kt / 197 mph / 317 km/h
Stall Speed (full flaps): 35 kt / 40 mph / 64 km/h
Stall Speed (clean): 46 mph / 74 km/h
Utility Category
- Gross Weight: 1100 lbs
- Baggage (Max): 40 lbs
- Useful Load: 480 lbs
- Rate of Climb: 800-1000 fpm
- Positive Load Factor: +4.4 Gs
- Negative Load Factor: -2.2 Gs
- L/D: 11:1
- CG Limits: 20-32%Wing Chord
Aerobatic Category
- Gross Weight: 950 lbs
- Baggage (Max): 10 lbs
- Rate of Climb: 1000-1250 fpm
- Positive Load Factor: +6.0 Gs
- Negative Load Factor: -3.0 Gs
- CG Limits: 23-29% Wing Chord
Subsonex JSX-1
Engine: PBS TJ100, 240 lb / 105 kg
Wing Span: 18' / 5,49m
Length: 15'9" / 4,80m
Wing area: 60 sq.ft / 5,57 sq.m
Empty weight: 330 lb / 150 kg
Max.Gross Weight: 750 lb / 340,2 kh
Fuel Capacity: 32 US.Gal. / 121 lt
![]() Subsonex JSX-1
The SubSonex jet aircraft prototype, JSX-1, made its first flight on August 10, 2011 at Wittman Airport in Oshkosh, Wisconsin. Piloted by Bob Carlton, the flight lasted approximately 14 minutes and focused on low-end speed, including stalls and low approaches in the landing configuration. The engine selected for the SubSonex is the Czech-built PBS TJ-100 turbojet.
Through the course of a series of high-speed taxi tests, Sonex design team has identified some issues with controllability of the aircraft in the transition phase approaching takeoff speeds, and has decided to enter a thorough design review process aimed at making the aircraft easier to handle for the average recreational pilot.
The Subsonex originally sported a tandem landing gear with outrigger gear on each wing tip. Due to the increased power offered by the new PBS TJ-100 engine selected for the SubSonex, it was determined that a tricycle gear configuration would be needed to increase yaw stability on the ground in the transition phase approaching takeoff speeds.
During Air Venture 2010, it was presented with the new fixed tricycle landing gear and the PBS TJ-100 turboJet engine.
Subsonex JSX-1 |