The JS5 Rey
Open Class Single Seater
The JS5 Rey is a high-performance Open Class sailplane, fully-equipped in its baseline standard.
Pilots can select the JS5 as a pure sailplane, or have a choice of propulsion systems:
- The Solo fuel injection self launcher system, or
- The MD-TJ 42 jet sustainer system
The JS5 is designed to be the best Open Class sailplane in the world.
Johan Bosman and his team worked closely with the structural team to find the optimum wingspan, taking into account the structural and material limitations.
The optimum wingspan for Open Class was determined to be 24.2 m.
3-VIEW AND TECHNICAL DATA
| Wingspan | 24.2m | 79ft |
|---|---|---|
|
Wing Area |
13.2m² |
142.08 ft² |
|
Aspect Ratio |
44.0 |
44.0 |
|
Maximum Weight |
770 kg |
1697 lbs |
|
Empty Weight (without fuel) |
~515 kg |
~1135 lbs |
UNMATCHED
PERFORMANCE
The completely new designed smaller inner wing, combined with the JS2’s optimized fuselage design, makes the JS5 a Open Class king in 24.2 m configuration.
The JS5 has been designed to climb well in small broken thermals as well as to excel at high speeds. The lightweight structure allows improved ground handling but also make the glider adept at utilizing the last thermals of the day.
Performance and Speed specifications
| Wingspan | 24.2 m | 79 ft |
|---|---|---|
|
Best LD (Theoretical) |
69.1 |
69.1 |
|
Minimum sink |
0.43 m/s |
84.6 ft/min |
|
Sink rate @ 200 km/h |
1.32 m/s |
260 ft/min |
|
Max Wing loading |
58.3 kg/m² |
11.94 lbs/ft² |
|
Min Wing loading (90kg pilot) |
~47.8 kg/m² |
~9.78 lbs/ft² |
|
Water ballast capacity |
~199 I |
~52.6 US gal lqd |
Standard Performance Features
- Control surface gaps sealed with the Streifeneder Teflon/Mylar
system - Boundary layer is controlled with blowholes and soft tripping
turbulators - Cockpit airflow controlled with an air extractor
- Integrated bug wiper garages
- Total energy and Pitot-static probes by Airsense fitted to fin
- Retractable/steerable tailwheel
Optional Performance Features
- JS bug wipers operated by the On-Track programmable automatic
winding system
POLAR
UNCOMPROMISED
SAFETY
As with all JS’s products safety is not negotiable and formed an integral part of the JS5’s design process. By going through multiple iterations for the structure of the fuselage, the weight of the glider was reduced to the bare minimum, but still adheres to the minimum requirements of CS-22.
A standard fire warning system ensures that the pilot is made immediately aware of a possible fire, ensuring that necessary action can be taken straight away.
Safety Specifications
| Safety limits | SI | IMP |
|---|---|---|
|
Max Speed V NE |
270 km/h |
145.8 kts |
|
Max rough air speed V A |
193 km/h |
104 kts |
|
Max aerotow speed V T |
180 km/h |
97 kts |
|
Cockpit crash resistance |
9G |
9G |
Standard Safety Features
- Automatically controls, including the water system
- Warning limit switches for landing gear & airbrakes
- Water dump sensor
- Hydraulic disc brake activated by a dedicated brake lever on control stick
- Powerful airbrakes, lockable in different settings
- Dynafoam™ energy-absorbing seat cushion
- MH CFF-480 O2 cylinder holder with quick release
- Fire warning system
Optional Safety Features
- Dolba transponder antenna in the vertical fin
- Flarm™ collision-avoidance antenna in front of vertical fin for maximum view
angle and range
SUPERIOR
COMFORT AND FEELING
The cockpit will be of similar layout as the JS3 – the largest performance glider cockpit in its class. Including easily removable covers for maintenance and sufficient space for additional oxygen.
Extensive time and effort has gone into designing a cockpit that has the space requirements the pilot needs but not compromising/impeding performance.
During the entire design phase of the aircraft the maintainability of the airframe received significant input and attention to ensure access to controls, electrical system
and the engine system.
The following features have been redesigned from previous models to ensure the pilot has an even more comfortable flying experience:
Comfort Specifications
| Comfort Features | SI | IMP |
|---|---|---|
|
Max cockpit weight |
115 kg |
254 lbs |
|
Maximum size pilot |
2.03 m |
6 ft 8″ |
|
Airbrake locking forces |
-15 daN |
-15 daN |
|
Cockpit shoulder width |
525 mm |
20.7 inch |
|
Landing gear retracting forces |
-15 daN |
-15 daN |
|
Inner wing panel weights |
<106 kg |
234 lbs |
Standard Features for your comfort
- In-flight electrically adjustable rudder pedals
- Ground adjustable seatback with headrest
- Canopy side window with air scoop
- Green/brown tinted canopy for increased UV protection
- Forward opening canopy for comfort
- Cockpit side vent with ventilation control
- Leather cockpit interior upholstery with storage pockets
- Canopy cover, tail dolly
- Serviceable tail battery
MAGNIFICENT
DESIGN
The developmental goal of the JS5 was to design the ultimate open-class glider. Therefore the optimum wingspan needed to be determined. Through extensive calculations, while considering material constraints, performance was accessed across various wingspans.
After multiple iterations, calculations revealed that the optimal performance peak was achieved with a modest wingspan of 24.2 meters.
The smaller wingspan does not only suggest superior performance but also provides advantages in terms of in-flight handling and ground operations.
PROPULSION SYSTEMS
JET SUSTAINER SYSTEM
The performance of the MD TJ-42 matches that of JS Products perfectly. There is no increase in workload, only a single switch and throttle dial, and there is no noticeable performance loss with the jet extended.
SOLO FUEL INJECTION SELF LAUNCHER SYSTEM
The retractable pylon thrust system, using the SOLO® 2625 02i two-stroke 625cc inline twin-cylinder liquid-cooled aircraft engine with electronic fuel injection and dual sparkplug high-voltage ignition system.
