Engineering:Erla 5
| Erla 5 | |
|---|---|
 The Erla 5 prototype, D-2378 | |
| General information | |
| Type | Sport aircraft |
| National origin | Germany |
| Manufacturer | Erla |
| Designer | Franz Mehr |
| History | |
| First flight | 18 July 1932 |
The Erla 5 (originally, Erla Me 5) was a light, single-seat sport aircraft built in small numbers in Germany in the early 1930s.[1][2][3] A trainer version was demonstrated on long-distance flights in 1939,[4] but failed to attract orders.[1][5]
Design
The Erla 5 was designed by Franz Mehr.[6] It was a low-wing, cantilever monoplane[1][2][3] of conventional configuration.[2][3] It had fixed, tailskid undercarriage,[1][2][3] and a conventional tail.[2][3] Power was supplied by a piston engine in the nose driving a tractor propeller.[2][3] The pilot sat in an open cockpit.[2][3] The wings were detachable and the aircraft was designed to be towed by road.[7][3] Construction was of wood throughout, and covered in plywood except for the fabric-covered control surfaces.[1][2][3] It was capable of aerobatics.[3]
Contemporary publications referred to it as a Volksflugzeug ("people's aircraft" in German).[8] The price in 1935 was 3,875 Reichsmarks[9] (about €20,150 in 2024[10]).
Operational history
The Erla 5 prototype first flew on 18 July 1932.[11]
Between 1 April and 20 May 1939, Friedrich Aufermann made a three-continent flight in an Erla 5, from Europe to Asia, Africa, and back again, covering around 20,000 kilometres (12,000 mi).[12] On 2 August, Heinz Gabler set a class distance record in an Erla 5, flying from Friedrichshafen to Vännäs, 1,915 kilometres (1,190 mi).[13]
As of 2020, one Erla 5 was still preserved in flying condition, a privately owned example in Switzerland, registered HB-SEX.[14]
Variants
- Erla Me 5
- Erla Me 5a
- Erla Me 5b
- Erla Me 5c
- Erla 5D
Specifications (variant)
Data from Grey & Bridgman 1935, p.172
General characteristics
- Crew: 1
- Length: 6.20 m (20 ft 4 in)
- Wingspan: 11.00 m (36 ft 1 in)
- Height: 1.75 m (5 ft 9 in)
- Wing area: 13.7 m2 (147 sq ft)
- Empty weight: 220 kg (485 lb)
- Gross weight: 340 kg (750 lb)
- Powerplant: 1 × DKW liquid-cooled, two-cylinder, horizontally opposed engine, 15 kW (20 hp)
Performance
- Maximum speed: 125 km/h (78 mph, 67 kn)
- Range: 400 km (250 mi, 220 nmi)
- Service ceiling: 3,500 m (11,500 ft)
- Time to altitude: 1,000 metres (3,300 ft) in 9 minutes
Notes
References
- ↑ 1.0 1.1 1.2 1.3 1.4 The Illustrated Encyclopedia of Aircraft 1983, p.1615.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Grey & Bridgman 1935, p.171
- ↑ 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 L'avion de sport et de tourisme D.K.W. Erla Me 5 a (Allemagne) 1933, p.277
- ↑ Seifert 2011, p.106–12
- ↑ Seifert 2011, p.112
- ↑ Seifert 2011, p.28
- ↑ Seifert 2011, p.36
- ↑ Seifert 2011, p.31–33
- ↑ Grey & Bridgman 1935, p.172
- ↑ Kaufkraftäquivalente historischer Beträge in deutschen Währungen 2025
- ↑ Seifert 2011, p.31
- ↑ Seifert 2011, p.110
- ↑ Seifert 2011, p.111
- ↑ Die HB-SEX fliegt wieder 2020
Bibliography
- "L'avion de sport et de tourisme D.K.W. Erla Me 5 a (Allemagne)". L'Aérophile (Paris: L'Aérophile) 41 (9): 277. September 1933.
- Grey, C.G.; Bridgman, Leonard (1935). Jane's All the World's Aircraft 1935. London: Sampson Low Marston.
- "Die HB-SEX fliegt wieder". Schinznach-Bad: SAMedia. 16 November 2020. https://www.cockpit.aero/rubriken/detailseite/news/die-hb-sex-fliegt-wieder.
- The Illustrated Encyclopedia of Aircraft. London: Aerospace Publishing.
- "Kaufkraftäquivalente historischer Beträge in deutschen Währungen". Frankfurt am Main: Deutsche Bundesbank. January 2025. https://www.bundesbank.de/resource/blob/615162/4162e577aa9cb1691714327342d6156b/472B63F073F071307366337C94F8C870/kaufkraftaequivalente-historischer-betraege-in-deutschen-waehrungen-data.pdf.
- Seifert, Karl-Dieter (2011). DKW und die Erla Me-Flugzeug. Erfurt: Sutton Verlag.
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