HPH 304TS Twin Shark

Why build a new double-seater?

Why did we decide to build a new double-seater from the scratch? There are already several performing models on the market. Nevertheless, we believe that no one really thought of a double-seater as of a competition-ready, high-performance sailplane model. That is exactly what we had in mind, when we started to think of a double-seater as appealing and performing as a single-seat glider. Our Twin Shark has not only the performance to fly in the FAI double-seater 20m-class, it also is as comfortable to sit in and to fly as any single-seater from our factory – whichsoever of the both seats you prefer.

Calculated performance leads the 20m flapped class

The aerodynamic performance of our Twin Shark is the result of extensive aerodynamic studies and wind-tunnel tests. It builds on the experience gained in our Shark family. A wing area of 15.38 plus an aspect ratio of 26.5 deliver class-leading performance, and advanced manufacturing techniques provide wing-loadings as low as 36kg/m2. At 850 kg maximum load, the loading is 52 kg/m2. An optimal curved leading edge and Shark winglets are maintained through high-end CNC techniques. Further performance is gained through the reflex-negative winglets on the tailplane which mimic a »shark« silhouette.

Class-leading cockpit environment

The spacious cockpit easily accomodates tall pilots, and those of generous build. A single-piece, side-opening canopy and extended reflex over the wing deliver outstanding visibility for both pilots. The key cockpit features which made the Shark cockpit popular have been maintained in the Twin Shark. Additionally, a cockpit ventilation system, in addition to the canopy vent keeps temperatures comfortable. This is where you enjoy staying for hours – make it a comfortable experience!

  1. 20 m flapped high performance
  2. MAUW 850 kg
  3. VNE 148 kts
  4. Best L/D 49:1 @ 69 kts
  5. Empty Weight 1058 lbs

Twin Shark 304 MTS – the Powerful Selflauncher

If you need a powerful Selflauncher you’ll go for the proven Binder 2625-02 engine system based on the Solo motor which provides 62 hp.

The 19-litre fuselage tank capacity can be supplemented with wing-tanks for range extension. Both motor extension and starter are operated by Lithium Manganese batteries which offer substantial weight saving capability.

For a high reliability industry-standard components are implemented in our Twin Shark. It also comes with an Ilec engine control system that is easy and safe in handling.

Solo 2625-02

Technische Daten Motor:


Motorleistung: ca 47KW / 62PS
max. Dauerdrehzahl: 6500 l/min
Vergaser: 2 Mikuni
Verdichtung: 9,5 : 1
Zündung: Ducati, Bosch W5 AC
Getriebe: Zahnriemen 3:1
Kraftstoffverbrauch: 24,5 l/h
Gewicht: 24 kg
Generator: 12 V 150 W
Schmierstoff: 1:50 Super-2Takt-Öl
Propellerturm: Kohlefaser
Propeller: (Technoflug) 2-Blatt Kunststoff



Twin Shark 304 JTS – the Efficient Jet Sustainer


Our single-seated Shark 304SJ has demonstrated the advantages of a jet sustainer compared to 2-stroke solutions: – the engine start is largely automated – the is no noticeable drag during engine deploying – cruising at high speeds is possible.

Our single-seater Shark is industry leader in the jet sustainer technology and our Twin Shark will offer a very similar jet technology. In order to maintain a performance similar to that of the single-seated Shark SJ, the jet thrust will be increased.

304TS TWIN SHARK Technical data

  jet engine IN DEVELOPMENT selflauncher
Wing span 20 m (65.6 ft) 20 m (65.6 ft)
Wing area 15,3 m2 / 165 ft2 15,3 m2 / 165 ft2
Aspect ratio 26,5 26,5
Fuselage length 8,95 m / 29.36 ft 8,95 m / 29.36 ft
Profile PW10-145/125 14,5-12,5% PW10-145/125 14,5-12,5% 
Empty weight 495 kg / 1091 lb 495 kg / 1091 lb
maximum take-off weight 850 kg / 1874 lb 850 kg / 1874 lb
Water ballast 240 l / 63,4 US gal 240 l / 63,4 US gal
Min. wing loading 39 kg/m2 / 8 lb/ft2 39 kg/m2 / 8 lb/ft2
Max. wing loading 55.5 kg/m2 / 11.4 lb/ft2 55.5 kg/m2 / 11.4 lb/ft2
Glide Performance    
Best glide ratio 49 49
at speed 128 km/h / 69 kt 128 km/h / 69 kt
min. sink rate (at min. weight) 0,5 m/s / 98 ft/min 0,5 m/s / 98 ft/min
at speed 92 km/h / 50 kt 92 km/h / 50 kt
Stall speed (at max. weight) 68 km/h / 37 kt 68 km/h / 37 kt
VNE 275 km/h / 148 kt 275 km/h / 148 kt

Specifications preliminary and subject to change without prior notice.

Please contact us

If you are interested about HpH 304 Twin Shark and you want make a test flight or price inquiry please click here.