HY4
| HY4 | |
|---|---|
|
|
| Type: | Fuel cells - experimental aircraft |
| Design country: | |
| Manufacturer: |
H2Fly GmbH |
| First flight: |
29th September 2016 |
| Number of pieces: |
1 |
The HY4 is a hydrogen aircraft and the first four-seat passenger aircraft to be powered exclusively by a hydrogen fuel cell battery system.
History and construction
The double hull design of the HY4 is based on the Pipistrel Taurus G4 , which was designed and built for the NASA - CAFE Green Flight Challenge 2011. The aircraft was purchased by H2Fly GmbH in January 2016 in order to develop a concept for a fuel cell powered electric multi-person aircraft in a partner alliance with DLR , Pipistrel , Ulm University , Hydrogenics and Stuttgart Airport .
The characteristic double-hull construction in fiber composite construction combines a large usable volume with an evenly distributed surface area . The hulls are used to hold the lithium-ion batteries , the hydrogen tanks and the passengers. The fuel cells with power electronics and cooling are located in an aerodynamically clad nacelle in the center of the central wing. The parallel connection of the battery system with the fuel cells resulted in a direct hybrid system that can use the high power density of the battery during take-off and climb and the high energy density of the hydrogen via the fuel cell for cruising.
After a two-year development and integration phase, the aircraft completed its first public flight on September 29, 2016 at Stuttgart Airport .
Technical specifications
| Parameter | Data |
|---|---|
| crew | 1 |
| Passengers | 3 |
| length | 7.4 m |
| span | 21.36 m |
| height | |
| Wing area | |
| Wing extension | |
| payload | |
| Empty mass | 630 kg |
| Max. Takeoff mass | 1500 kg |
| Cruising speed | 145 km / h |
| Top speed | 200 km / h |
| Service ceiling | |
| Range | 750–1500 km depending on the storage technology |
| Engines | 1 × electric motor 80 kW, cruise flight 26 kW, two-blade propeller |
| accumulator | Li-Po (4 × 20 cells), max. Discharge current: 600 A, capacity : 75 Ah, 21 kWh, weight 130 kg |
| Fuel cell | 4 × PEM (440 cells) with 42 kW, liquid-cooled, mass 100 kg |
| fuel | gaseous hydrogen (H 2 ), 350 bar; Max. 437.5 bar; Max. Supply H 2 : 7 kg at 350 bar / 8.6 kg at 437.5 bar |
Web links
- H2Fly , website of the operator
- HY4 Delivering the Future (English)
Individual evidence
- ↑ Emission-free propulsion for aviation: maiden flight of the four-seat HY4 passenger aircraft. In: dlr.de. September 29, 2016. Retrieved January 26, 2017 .
- ↑ a b c d e f g h HY4 - The airplane. (PDF; 370 kB) In: dlr.de. Institute for Technical Thermodynamics, accessed on January 26, 2017 .
- ↑ a b H2FLY: HY4 - technology. May 15, 2016, accessed February 2, 2017 .