Neukom Elfe S4
| Neukom Elfe S4 | |
|---|---|
|
|
| Type: | Glider |
| Design country: | |
| Manufacturer: |
Albert Neukom |
| First flight: |
1972 |
| Number of pieces: |
14 + 23 S4A + 21 S4D |
The Elfe S4 is a glider that was developed by the Swiss glider manufacturer A. Neukom. It could be obtained as a finished aircraft or as an amateur construction.
construction
Albert Neukom designed the Elfe S4 in 1969 and completed it in 1972. It is a single-seat club-class performance glider . It has a retractable landing gear and a pendulum elevator . The two-part wings with a span of 15 meters are made of one millimeter thick plywood in a sandwich construction with cardboard honeycomb filling material and have a Wortmann profile . The aircraft's best glide ratio is 37.5 at 95 km / h. The maximum speed is 210 km / h. The aircraft is only approved for non-commercial use.
The Elfe S4A is available in different versions. Some Elfe S4 were modified with a dampened horizontal stabilizer. There are also individual pieces that are equipped with winglets .
The Elfe S4D was manufactured by the youth education center (Jubi) Oerlinghausen.
Technical specifications
| Parameter | Data |
|---|---|
| crew | 1 |
| length | 7.30 m |
| span | 15.00 m |
| Elevation (rudder) | 1.40 m |
| Wing area | 11.8 m² |
| Elongation | 19th |
| mean chord (geometric) | 0.79 m |
| mean chord (aerodynamic) | 0.82 m |
| Wing pitch angle to rear fuselage axis | + 3 ° |
| Wing profile | Wortmann , from FX 61-163 to FX 60-126 |
| Preparation mass | 270 kg |
| Max. Takeoff mass | 350 kg S4 (D) / 370 kg S4A |
| Glide ratio | 37.5 |
| Wing loading | 31.2 kg / m² |
literature
- Specific Airworthiness Specification . European Aviation Safety Agency , March 27, 2007 (English, europa.eu [PDF]).
Web links
Individual evidence
- ↑ a b Elf S4. Sail-Flight-History Foundation, accessed on January 26, 2020 .
- ↑ a b c Lilly-Annemarie Grundbacher: The Neukom gliders. (PDF; 1.9 MB) Oldtimer Gliding Association Switzerland, 2012, accessed on January 26, 2020 .
- ↑ a b c Neukom Elfe S4D (private). Akaflieg Hamburg, accessed on January 26, 2020 .
- ↑ Device identification sheet . Luftfahrtbundesamt , May 20, 1986 ( lba.de [PDF]).
- ↑ EASA SPECIFIC AIRWORTHINESS SPECIFICATION for sailplane construction A. Neukom Elfe. (PDF; 26 kB) European Aviation Safety Agency , March 27, 2007, accessed on January 26, 2020 (English).
- ↑ Federal Office for Civil Aviation FOCA: Type Certificate Elfe S3 / S4 / S4A. (PDF; 900 kB) In: www.bazl.admin.ch. Federal Office for Civil Aviation FOCA, January 15, 1980, accessed on June 9, 2020 .