Dallach D2
| D2 Sunrise | |
|---|---|
|
|
| Type: | Microlight |
| Design country: | |
| Manufacturer: |
Wolfgang Dallach |
| First flight: |
1986 |
| Production time: |
1984-1991 |
| Number of pieces: |
~ 50 |
The Dallach D2 "Sunrise" (also Sunrise II) is an ultralight aircraft that was developed by Wolfgang Dallach .
history
After the end of his aerobatic career in 1982, Wolfgang Dallach devoted himself to the development of ultralight aircraft. His debut was the low-wing D2 Sunrise, which was manufactured between 1984 and 1991 in his company in the Swabian town of Straßdorf . From 1989 it was replaced by the double-decker Sunwheel and from spring 1993 by the two-seater Fascination, which is equipped with retractable landing gear and partly with a tail wheel .
construction
The D2 Sunrise is a two - seater low - wing aircraft with a tubular steel fuselage and an open cockpit, which is similar in design to the Klemm L25 . The construction changed during the manufacturing period. The prototype fuselage had a triangular cross-section at the rear, whereas the later series models had a box fuselage. The wings of the prototype had wooden main spars and the front wing area was planked with plywood up to the main spar. In the series, the main spar was made of carbon fiber composite material and firmly glued to the CFRP wing nose. After the first series aircraft, the wing profile (Wortmann FX 63-137) was modified. It got a straight underside to allow a slightly higher flight speed.
The modified Visa engine has also been revised again. The first engines had dry sump lubrication. They were installed upside down, the oil pan was removed and the resulting opening was sealed with an aluminum plate. This cover had leakage problems. Therefore, the engine was installed in such a way that the oil pan was at the bottom and the original wet sump lubrication remained. But since the exhaust stubs were now inclined upwards and forwards, a 180 ° elbow was necessary on each cylinder, from which a flexible hose led to the silencer under the fuselage. This construction got the nickname "antlers". The engine cover, the upper tail cover and the load-bearing parts of the wings were made of fiber-reinforced plastic. The tail surfaces were not profiled and consisted of covered tubular steel frames with rigid foam filling. The elevator surfaces can be folded up for transport without having to disconnect the rudder connections. A modified 40 hp two-cylinder from the Citroën Visa or similar engines with up to 70 hp were used as the engine. With the standard tank with a volume of 30 liters you could stay in the air for up to 5 hours.
Technical specifications
| Parameter | Sunrise | Sunrise II | Sunrise II with Verner engine |
|---|---|---|---|
| crew | 1 + 1 | ||
| length | 5.30 m | 5.90 m | |
| span | 13.10 m | 13.22 m | 10.82 m |
| Torso height | ? m | 1.90 m | ? m |
| Wing area | 15.7 m² | 15.4 m² | 13.24 m² |
| Wing extension | 10.9 | 11.3 | 8.8 |
| Glide ratio | 18th | 18th | ? |
| Slightest sinking | 1 m / s | ||
| payload | ? kg | ? kg | ? kg |
| Empty mass | 256 kg | 150 kg | 256 kg |
| Max. Takeoff mass | 400 kg | 340 kg | 400 kg |
| Cruising speed | 100 km / h | 105 km / h | ? km / h |
| Top speed | 150 km / h | 165 km / h | 130 km / h |
| Minimum speed | 45 km / h | 55 km / h | 65 km / h |
| Take-off run | 70 m | ||
| Service ceiling | ? m | ? m | ? m |
| Range | 500 km | 266 km | ? km |
| Engines | a two-cylinder boxer engine (from Citroën Visa ); 29 kW, 650 cc | VERNER SVS 1400 | |
See also
Web links
- Sunrise: D-MFWD
- Sunrise ... another FluSi!
- Flyer (PDF file; 2.4 MB)
- Aerokurier 11-88 (PDF file; 2.6 MB)
Individual evidence
- ↑ a b FliegerRevue April 2011, pp. 56–59, The very light ones.
- ↑ a b Sunrise. In: ultimer.de. Retrieved April 3, 2011 .
- ↑ a b c device data sheet. (PDF) Data sheet no .: 61040 Edition no .: 4 of: January 12, 2004. In: daec.de. DAeC Air Sports Equipment Office, accessed April 3, 2011 .
- ↑ a b c d e f g h i Sunrise II . In: aerokurier . No. 11 , 1988, pp. 1484 .