Junkers L 5
| Junkers | |
|---|---|
 |
|
| Junkers L 5 | |
| Production period: | 1925-1934 |
| Manufacturer: | Junkers |
| Working principle: | Otto |
| Motor design: | line |
| Valve control: | OHC |
| Displacement: | 22920 cm 3 |
| Mixture preparation: | Carburetor |
| Engine charging: | no |
| Power: | 206 kW |
| Max. Torque: | 1340 Nm |
| Dimensions: | 326 kg |
| Previous model: | Junkers L 2 |
| Successor: | Junkers L 55 |
The Junkers L5 was a liquid-cooled six-cylinder - aircraft engine with 22.9 liters capacity , to the Junkers engine GmbH in 1925 as a manufacture under license of the BMW IV made. It was the successor to the smaller Junkers L 2 from 1924, which in turn was based on the BMW IIIa .
history
In the early 1920s, Professor Hugo Junkers decided to start manufacturing his own engines due to the increasing demand for aircraft engines. Experience in large engine construction was available; the Junkers engine GmbH (Jumo) was established in 1923. Until then, all Junkers Flugzeugwerke AG aircraft had been equipped with engines from BMW , DMG , Siemens & Halske and Armstrong-Siddeley . The first test runs were carried out in 1924 and in August 1925, the L 5 in the version with 228 kW (310 hp) received approval. Over 1000 units were produced with different compression ratios from 5.0: 1 to 7.0: 1, with the L 5G for fuel with 80 octane being the most popular variant. The L 5 was 1927 twelve-cylinder - V-engine L 55 further developed.
construction
It is a water-cooled six - cylinder in- line engine . The crankcase of an aluminum alloy is split horizontally. The crankshaft is made of gray cast iron , seven slide bearings are used as crankshaft bearings . The cast iron cylinders are arranged individually on the crankcase and have a welded-on sheet steel jacket for water cooling. The pistons each have three piston rings . The overhead camshaft ( OHC valve control ) is driven by a vertical shaft. The hanging valves are operated by roller rocker arms.
A single carburetor takes care of the mixture formation . The Doppelzündanlage (two spark plugs per cylinder) consists of two Bosch - magnetos . The firing order is: 1–5–3–6–2–4. The pressure circulation lubrication is maintained with a piston oil pump. A cooling water pump circulates the coolant.
use
The Junkers L 5 was used as a drive in a number of aircraft. In particular, it was also used on prototypes and record flights.
Use in Junkers aircraft
- Junkers F 13
- Junkers A 20
- Junkers A 35
- Junkers G 23
- Junkers G 24
- Junkers K 30
- Junkers G 31
- Junkers W 33
Use with other types of aircraft
- Albatros L 73
- Albatros L 75
- Caspar C 32
- Focke-Wulf A 32
- Heinkel He 42
- Heinkel HD 24
- Heinkel He 50
- Messerschmitt M24
- Rohrbach Ro VIII
Technical specifications
| Parameters | Data of the Jumo L 5 | Data of the Jumo L 5G | Data of the Jumo L 5Ga |
|---|---|---|---|
| Manufacturer | Junkers Motorenbau GmbH | ||
| Construction year | 1925 | 1928 | 1930 |
| Type | water-cooled six - cylinder four-stroke in - line engine , vertical ( crankshaft below), without charging | ||
| Valve control | an overhead camshaft ( OHC ), driven by the crankshaft via a vertical shaft, two valves per cylinder | ||
| drilling | 160 mm | ||
| Hub | 190 mm | ||
| Displacement | 22.92 l | ||
| Compression ratio | 5.5: 1 | 7: 1 | |
| length | 1750 mm | 1800 mm | |
| width | 650 mm | ||
| height | 1265 mm | 1215 mm | |
| Dry weight | 326 kg | 342 kg | 344 kg |
| Starting power | 320 hp (235 kW) at 1450 rpm | 380 hp (279 kW) at 1900 rpm | 425 PS (313 kW) at 1900 min |
| Combat and climb performance | 320 hp (235 kW) at 1450 rpm | 380 hp (279 kW) at 1900 rpm | 425 hp (313 kW) at 1900 rpm |
| Nominal power on the ground | 310 hp (228 kW) at 1400 rpm | 340 hp (250 kW) at 1700 rpm | 380 hp (279 kW) at 1700 rpm |
| Continuous power close to the ground | 280 hp (206 kW) at 1340 rpm | 280 hp (206 kW) 1600 rpm | 380 hp (279 kW) at 1600 rpm |
| Weight related performance | 1 HP / kg (0.73 kW / kg) | ||
| Mass for money | 1.376 kg / kW | ||
| Fuel consumption with continuous power | 230 g / PSh | 235 g / PSh | 230 g / PSh |
| Lubricant consumption at continuous output | 10 g / PSh | 12 g / PSh | |
Versions
- L 5
- L 5G - further developed L 5 with hydraulic vibration damper
- L5 Ga
- L5 Z
See also
literature
- Kyrill von Gersdorff, Kurt Grasmann: aircraft engines and jet engines . Bernard & Graefe Verlag, 1981, ISBN 3-7637-5272-2
- Antony L. Kay, Paul Couper: Junkers Aircraft and Engines 1913-1945 . Naval Institute Press, 2004, ISBN 978-0-851779850
Web links
- Hugo Junkers Homepage: Junkers L 5 , accessed on November 11, 2011 (English)
Individual evidence
- ↑ The Virtual Aviation Museum: ( Memento of the original from November 22, 2008 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. Junkers L 5, accessed January 15, 2009
- ↑ The Virtual Aviation Museum: ( Memento of the original from August 29, 2008 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. Junkers L 2, accessed January 15, 2009
- ↑ Junkers.de: ( Memento of the original from January 31, 2009 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. The beginnings of Junkers engine construction, accessed on January 15, 2009
- ^ A b Helmut Stützer: The German military aircraft 1919–1934 . E. S. Mittler & Sohn, Herford 1984, ISBN 3-8132-0184-8 , p. 231 .
- ↑ Junkers L5G. Archived from the original on June 11, 2013 ; Retrieved June 6, 2015 .
