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Sailplane · JS5

JS5 Rey

The best-performing Open Class sailplane flying today: 24.2 m span, up to 69:1 glide ratio — as a pure glider or with the SOLO NEO self-launcher.

The JS5 was designed with one goal: to be the best Open Class sailplane in the world. Its new, smaller inner wing on the optimised JS2 fuselage makes it the king of the 24.2-metre class. As the official JS partner in Switzerland we guide your configuration personally.

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A JS5 Rey sailplane soaring over open countryside
A JS5 Rey sailplane on the airfield apron ready for launch

Why the JS5

Dr. Johan Bosman's team ran the numbers across many wingspans — 24 metres proved optimal for the Open Class: maximum performance with manageable structure, stiffness and ground handling.

Lightweight construction lets the JS5 climb in small thermals and hold high speeds. For pilots who prefer something more compact and competition-friendly, 18-metre wingtips are planned as an additional option.

69 : 1
Best glide ratio
24.2 m
Wingspan (18 m planned)
Pure / SOLO
Propulsion (JET optional)
9 G
Cockpit crash resistance

Technical data

24.2-metre configuration.

Best glide ratio (L/D)69 : 1
Wing area13.2 m²
Aspect ratio44.0
Empty weight450 kg
Max. take-off weight800 kg
Water ballast199 l
Minimum sink0.45 m/s
Max. wing loading60.6 kg/m²
Never-exceed speed (VNE)270 km/h
Manoeuvring speed (VA)193 km/h
Max. aerotow speed180 km/h
Max. pilot height2.03 m
JS5 Rey leather headrest with embroidered Jonker Sailplanes logo
JS5 Rey cockpit seat with safety harness and energy-absorbing cushion

Cockpit & comfort

  • Cockpit in the JS3 layout — the largest performance cockpit in its class
  • Electrically in-flight adjustable pedals and seatback with headrest
  • Forward-opening canopy, green-tinted, with an improved ventilation system
  • Leather interior with storage pockets, 525 mm shoulder width

Performance & safety

  • Teflon/Mylar control-surface gap sealing and boundary-layer control
  • Airsense probes at the tailplane, integrated bug-wiper garages
  • Dynafoam seat cushion, fire warning system as standard
  • Hydraulic disc brake, steerable tailwheel, optional Flarm antenna

Propulsion options

Pure — unpowered

The JS5 is also available without an engine: the lightest variant, with the lowest empty weight and the most room for water ballast — for fields with a tow or winch, and for uncompromising competition flying.

SOLO NEO self-launch

The retractable pylon system carries the SOLO® 2625-02i NEO Silent: a liquid-cooled, fuel-injected twin-cylinder, 50 kW (64 hp), for true self-launch. Runs on automotive or aviation gasoline, smooth and reliable.

MD-TJ-42 jet sustainer

The MD-TJ-42 jet sustainer is the perfect match for JS gliders: one switch, one throttle dial, with no noticeable performance loss when the jet is extended. Reliable, efficient and remarkably easy to use.

Class & certification

Open Class, certified under EASA CS-22; type certification via M&D Flugzeugbau, the EASA-approved design organisation. 18-metre wingtips are planned for the future.

Complete technical data, manuals and brochures from the manufacturer Jonker Sailplanes.

Full specifications & downloads

Request an Offer

Interested in this aircraft? Request a no-obligation offer — we will get back to you personally.

Propulsion