29:
170:
The Jumo 204 solved this problem to a very large degree through a better arrangement of the ports. The intake port was located under the "lower" piston, while the exhaust port was under the "upper". The lower crankshaft ran eleven degrees behind the upper, meaning that the exhaust ports opened first,
157:
with six cylinders and twelve pistons, in an opposed piston configuration with two crankshafts, one at the bottom of the cylinder block and the other at the top, geared together. The pistons moved towards each other during the operating cycle. There were two cam-operated injection pumps per cylinder,
214:
A research diesel engine for test bed use only, the Mo3 was a four-cylinder, (eight piston), opposed-piston engine designed to run horizontally. Tested from 1913, the problems found in testing the Mo3 were progressively solved after World War I with the Fo3 and later opposed piston
221:
From 1924, Junkers experimented with the Fo3, A vertical 5-cyl. opposed-piston diesel, which ran on a test bed in the summer of 1926, developing 620 kW (830 hp) at 1,200 rpm. Mostly successful, the Fo3 did highlight the need for accurate dynamic balancing of the rotating
166:
because both ports open and close at the same time and are generally located across from each other in the cylinder. This leads to poor scavenging of the burnt charge, which is why valve-less two-strokes generally run smoky and are inefficient.
161:
As is typical of two-stroke designs, the Jumos used fixed intake and exhaust ports instead of valves, which were uncovered when the pistons reached a certain point in their stroke. Normally such designs have poor
680:
228:(a.k.a. SL1) The Fo4, benefiting from the experience gained with the Fo3, was a six-cylinder opposed-piston diesel engine, tested from 1928 and flown in the nose of a
270:, which was for some time one of the most powerful and compact diesel engines in the world. Work on this engine started in 1947 and engines were running by 1950.
171:
allowing proper scavenging. This system made the two-stroke Jumos run as cleanly as four-stroke engines using valves, but with considerably less complexity.
562:
865:
768:
707:
238:
After the successful bench runs and flight tests, the Fo4 was refined into the certificated Jumo 4, enjoying limited success powering re-engined
670:
748:
326:
Flugzeug-Typenbuch. Handbuch der deutschen
Luftfahrt- und Zubehör-Industrie 1944, Der Flugmotor. Bauteile und Baumuster, and Schweitzer
917:
700:
897:
912:
693:
654:
546:
902:
907:
472:
601:
631:
Paul Henry
Schweitzer: Scavenging of two-stroke cycle Diesel engines, Macmillan, New York 1949, Table 18–I
252:
Later production of refined Jumo 4s: Jumo 204A, 204B, and 204C, differing in airscrew drive arrangements.
193:
just prior to the war. Late in the war, they mounted three
Culverins in a triangle layout to produce the
266:
just prior to the war. After the war, they mounted three
Culverins in a triangle layout to produce the
147:
514:
675:
312:
99:
52:
487:
163:
197:, which was for some time one of the most powerful and compact diesel engines in the world.
8:
596:(in German) (Facsimile reprint 1986 ed.). Leipzig: Herm. Beyer Verlag. p. 396.
360:
243:
41:
285:
259:
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37:
446:
600 PS (592 hp; 441 kW) at 1,600 rpm (max. continuous) at sea level
719:
351:
280:
263:
190:
186:
685:
594:
Flugzeug-Typenbuch. Handbuch der deutschen
Luftfahrt- und Zubehör-Industrie 1944
877:
239:
150:(RLM), where the first number indicates the manufacturer; 2 – Junkers Motoren.
95:
891:
483:
0.006 kg/PSh (0.013 lb/(hp⋅h); 0.008 kg/kWh) at max continuous
477:
0.155 kg/PSh (0.346 lb/(hp⋅h); 0.211 kg/kWh) at max continuous
454:
342:
298:
267:
194:
443:
750 PS (740 hp; 552 kW) at 1,700 rpm (5 minutes) at sea level
303:
229:
179:
763:
758:
647:
World
Encyclopedia of Aero Engines: From the Pioneers to the Present Day
130:
Development of the
Junkers diesel engines started in the 1920s with the
753:
743:
738:
733:
387:
619:
Der
Flugmotor. Bauteile und Baumuster. Luftfahrt Lehrbücherei Band 7
28:
716:
103:
62:
106:. It entered service in 1932. Later engines in the series, the
158:
each feeding two nozzles, totaling four nozzles per cylinder.
122:, differed in stroke, bore, and supercharging arrangements.
262:, who built a small number of Jumo 204 developments as the
146:, which in turn was re-designated Junkers Jumo 204 by the
459:
26.3 PS/L (0.43 hp/cu in; 19.34 kW/L)
206:
Data from
Junkers Aircraft & Engines 1913–1945.
405:direct injection through four nozzles per cylinder
715:
889:
671:Multi-crankshaft opposed piston engines (french)
492:1 PS/kg (0.45 hp/lb; 0.74 kW/kg)
178:) was test flown in early 1929 installed in a
701:
563:"Longer Range of Diesel Plane Cuts Fuel Cost"
318:
392:750 kg (1,653 lb) dry, unequipped
708:
694:
329:
681:OpposedPiston Engines.com's Jumo 204 Page
591:
125:
585:
539:Junkers Aircraft & Engines 1913–1945
498:6.6 atm (6.7 bar; 97 psi)
338:6-cylinder liquid-cooled inverted inline
676:Description and cutaway view (Jumo 205)
644:
890:
592:Schneider, Helmut (Dipl.Ing.) (1944).
365:28.5 L (1,739.18 cu in)
258:The Jumo 204 and 205 were licensed to
185:The Jumo Fo3 and 204 were licensed to
689:
541:. London: Putnam Aeronautical Books.
532:
530:
417:dry sump, pressure feed with scavenge
649:(5th ed.). Stroud, UK: Sutton.
616:
555:
174:The Jumo 204 (originally designated
102:produced by the German manufacturer
610:
536:
98:, inline, liquid-cooled 6-cylinder
13:
638:
527:
246:, remaining in service until 1939.
189:, who built a small number as the
14:
929:
880:(Junkers design built by Heinkel)
664:
16:German diesel six cylinder engine
27:
274:
625:
427:
1:
918:1920s aircraft piston engines
520:
396:
356:210 mm (8.27 in) x2
617:Katz, Hans (Dr.Ing) (1940).
383:1,514 mm (59.6 in)
371:1,457 mm (57.4 in)
142:. The Fo4 was re-designated
7:
508:
200:
10:
934:
377:510 mm (20.1 in)
347:120 mm (4.72 in)
319:Specifications (Jumo 204A)
148:Reichsluftfahrtministerium
898:Two-stroke diesel engines
874:
858:
837:
726:
473:Specific fuel consumption
35:
26:
21:
913:Junkers aircraft engines
515:List of aircraft engines
44:version of the Jumo 204
903:Aircraft diesel engines
573:(6): 893. December 1935
330:General characteristics
313:Blohm & Voss BV 138
908:Opposed piston engines
645:Gunston, Bill (2006).
306:and Japanese licensed
126:Design and development
100:aircraft Diesel engine
53:Aircraft Diesel engine
621:. Berlin: de Gruyter.
488:Power-to-weight ratio
164:volumetric efficiency
153:These engines used a
537:Kay, Antony (2004).
232:from 30 August 1929.
244:Deutsche Luft Hansa
36:Cut away view of a
286:Junkers Ju 52/1mdo
885:
884:
567:Popular Mechanics
464:Compression ratio
88:
87:
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720:aircraft engines
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481:Oil consumption:
308:Mitsubishi Ki-20
187:Napier & Son
155:two-stroke cycle
83:Junkers Jumo 205
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639:Further reading
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281:Junkers F.24kay
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264:Napier Culverin
255:Napier Culverin
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191:Napier Culverin
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268:Napier Deltic
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242:airliners of
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575:. Retrieved
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403:Fuel system:
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361:Displacement
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304:Junkers G.38
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275:Applications
230:Junkers G.24
205:
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180:Junkers G 24
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91:
89:
428:Performance
415:Oil system:
411:Diesel fuel
222:components.
140:Junkers SL1
136:Junkers Fo4
132:Junkers Fo3
892:Categories
603:381120484X
577:4 February
521:References
409:Fuel type:
397:Components
388:Dry weight
295:from 1937)
69:First run
876:See also
859:Turboprop
496:B.M.E.P.:
324:Data from
144:Junkers 4
22:Jumo 204
838:Turbojet
509:See also
249:Jumo 204
215:diesels.
201:Variants
120:Jumo 208
116:Jumo 207
112:Jumo 206
108:Jumo 205
92:Jumo 204
42:capacity
38:Jumo 205
504:0.695:1
381:Height:
369:Length:
104:Junkers
94:was an
63:Junkers
878:HeS 30
653:
600:
545:
375:Width:
352:Stroke
293:D-UZYP
289:D-1974
260:Napier
235:Jumo 4
176:Jumo 4
336:Type:
72:1929
49:Type
651:ISBN
598:ISBN
579:2020
543:ISBN
468:17:1
343:Bore
134:and
118:and
90:The
866:022
850:012
845:004
829:224
824:223
819:222
814:218
809:213
804:211
799:210
794:208
789:207
784:206
779:205
774:204
769:203
764:L88
759:L55
225:Fo4
218:Fo3
211:Mo3
894::
754:L8
749:L7
744:L5
739:L2
734:L1
571:64
569:.
565:.
529:^
182:.
114:,
110:,
709:e
702:t
695:v
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291:(
138:/
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
