26:
195:
However, engine development was proving difficult; the first Zeta R.C.45 was run on 28 February 1941,rated at 1,200 hp (895 kW), but would only develop 1,085 hp (809 kW), as well as having many other issues. Resolving these took time and when the more powerful Zeta RC24/60 was run
155:
The Zeta was, in essence, two Gamma R.C.15 V-12 engines coupled to a single crankshaft. The engine consisted of an aluminium crankcase with four cylinder banks, each mounted at 90 degrees, with six cylinders. Each cylinder had a single intake and exhaust valve, driven by dual camshafts, and two spark
129:
During the 1930s, Isotta
Fraschini had developed a line of air cooled inverted V12 aircraft engines including the 540 hp (403 kW) Gamma. These proved moderately successful at a time when most Italian aircraft engines were radials, including Isotta Fraschini’s own
204:
Further development ceased following the armistice on 8 September 1943. By this time, Reggiane was still waiting for their first engine. As a consequence, the company had already started developing their own engine, the 18 cylinder
138:. An inverted V12 like the Isotta Fraschini designs, it differed in its liquid cooling but also in its capability, being over twice as powerful as the Italian engines. To compete with this, and other foreign designs like the
200:
but cooling problems continued to hold development back. It was not until 14 August 1943 that the first engine took to the air in a
Caproni Vizzola F.6Z, nearly two years after the Daimler-Benz-powered F.6M.
180:. On 7 October 1941, the design of a version of the F.6, named F.6Z, to be powered by the new Zeta was instigated, the first aircraft being ordered on 16 June 1942. In October 1942,
803:
134:. In 1939, the Italian air ministry, looking for an appropriate power plant for their next generation of fighter aircraft, approached Germany to license the
945:
955:
796:
950:
789:
772:
733:
714:
869:
498:
196:
in May 1943, it still failed its type test. Reggiane tested a mock-up in a wind tunnel and mounted it in the nose of a
307:
744:
640:
114:
849:
839:
854:
889:
884:
864:
859:
844:
834:
525:
829:
879:
874:
233:
Project with two-speed supercharger, rated at 2,200 m (7,200 ft) and 5,000 m (16,000 ft).
227:
Project with two-speed supercharger, rated at 2,100 m (6,900 ft) and 6,000 m (20,000 ft).
221:
Project with two-speed supercharger, rated at 1,500 m (4,900 ft) and 4,500 m (14,800 ft).
904:
899:
329:
197:
118:
86:
894:
131:
919:
914:
909:
319:
276:
248:
206:
707:
The
Complete Book of Fighters: An Illustrated Encyclopedia of Every Fighter Aircraft Built and Flown
121:
V12 engines on a single crankshaft, but proved troublesome to develop and never entered production.
503:
380:
240:
177:
173:
169:
165:
135:
110:
960:
139:
243:
supercharger, rated at 2,400 m (7,900 ft) and 6,000 m (20,000 ft), for the
768:
729:
710:
478:
295:
99:
41:
812:
324:
244:
189:
185:
106:
66:
184:, also owned by Caproni, was also tasked by the Air Ministry to develop a version of their
815:
513:
371:
313:
25:
939:
508:
362:
168:
which was originally planned to have an Isotta
Fraschini V-12 engine but flew with a
257:
Initial design, 1,150 hp (858 kW), rated at 3,500 m (11,500 ft).
442:
301:
285:
Project with Isotta
Fraschini supercharger, rated at 5,000 m (16,000 ft).
164:
Isotta
Fraschini was owned by Caproni, who also produced aircraft, including the
781:
156:
plugs. The whole engine was designed to be fitted as a replaceable power pack.
426:
407:
44:
269:
1,200 hp (895 kW) project, rated at 4,200 m (13,800 ft).
109:
in the 1940s. It was developed as an indigenous alternative to the imported
453:
436:
356:
181:
102:
432:
56:
209:. The sole F.6Z remained the only aircraft flown with the Zeta.
785:
687:
Brotzu, Emilio; Caso, Michele; Cosolo, Gherardo Cosolo (1972).
678:
Brotzu, Emilio; Caso, Michele; Cosolo, Gherardo Cosolo (1971).
105:
with 24 cylinders developed by the
Italian engineering company
700:(in Italian) (120). Parma: Ermanno Albertelli Editore: 36–43.
176:
derived from this design, powered by the more powerful
239:
1,250 hp (932 kW) version with a two-speed
188:
with the new engine. Seven examples of the proposed
822:
696:Cernuschi, Enrico (2003). "Il motore impossibile".
691:(in Italian). Vol. 3. Roma: Edizioni Bizzarri.
682:(in Italian). Vol. 2. Roma: Edizioni Bizzarri.
263:Project, rated at 4,000 m (13,000 ft).
673:(in Italian). Turin: La Bancarella Aeronautica.
765:Italian Civil and Military Aircraft, 1930-1945
797:
8:
745:"Isotta Fraschini Zeta X-24 Aircraft Engine"
705:Green, William; Swanborough, Gordon (1994).
641:"Isotta Fraschini Zeta X-24 Aircraft Engine"
355:24-cylinder, six row, four bank, air cooled
804:
790:
782:
113:that was being built under licence as the
550:
548:
546:
279:, rated at 4,500 m (14,800 ft).
571:
569:
542:
474:919 kW (1,232 hp) at 2700 rpm
142:, Isotta Fraschini developed the Zeta.
15:
7:
946:Air-cooled aircraft piston engines
726:World Encyclopedia of Aero Engines
709:. New York: Smithmark Publishers.
14:
956:Isotta Fraschini aircraft engines
689:Dimensioen Cielo - Caccia Assalto
680:Dimensioen Cielo - Caccia Assalto
172:. The company also developed the
117:. The engine was essentially two
767:. Los Angeles: Aero Publishers.
611:Brotzu, Caso, Cosolo 1971, p. 30
593:Brotzu, Caso, Cosolo 1972, p. 30
584:Brotzu, Caso, Cosolo 1971, p. 29
435:per cylinder with dual overhead
33:Isotta Fraschini Zeta R.C.25/60
24:
639:Pearce, William (5 June 2017).
332:(mock-up only for development)
1:
951:1940s aircraft piston engines
728:. Stroud: Sutton Publishing.
629:Green and Swanborough, p. 110
499:Armstrong Siddeley Deerhound
763:Thompson, Jonathan (1963).
412:760 kg (1,680 lb)
385:38.3 L (2,337 in)
308:Caproni Ca.331 C.N. Raffica
977:
403:1,000 mm (39 in)
397:1,000 mm (39 in)
391:1,730 mm (68 in)
115:Fiat RA.1050 R.C.58 Tifone
376:130 mm (5.1 in)
367:125 mm (4.9 in)
298:(unbuilt, Zeta R.C.21/60)
32:
23:
18:
743:Pearce, Willian (2017).
526:List of aircraft engines
447:Single stage, mechanical
669:Alegi, Gregory (2001).
347:General characteristics
337:Specifications (R.C.35)
724:Gunston, Bill (2006).
330:Savoia-Marchetti SM.79
316:(unbuilt, Zeta R.C.42)
198:Savoia-Marchetti SM.79
146:Design and development
87:Isotta Fraschini Gamma
96:Isotta Fraschini Zeta
563:Ceruschi, 2003, p.41
554:Gunston, 2006, p.107
320:Caproni Vizzola F.6Z
277:Caproni-Vizzola F.6Z
249:Caproni-Vizzola F.6Z
504:Continental XH-2860
178:Daimler-Benz DB 605
174:Caproni Vizzola F.6
170:Daimler-Benz DB 601
166:Caproni Vizzola F.4
136:Daimler-Benz DB 605
111:Daimler-Benz DB 605
45:X24 aircraft engine
493:Comparable engines
140:Rolls-Royce Merlin
933:
932:
749:Old Machine Press
645:Old Machine Press
620:Alegi, 2001, p.34
602:Alegi, 2001, p.35
479:Compression ratio
296:Ambrosini SAI.403
92:
91:
968:
813:Isotta Fraschini
806:
799:
792:
783:
778:
759:
757:
755:
739:
720:
701:
692:
683:
674:
671:Reggiane RE 2005
656:
655:
653:
651:
636:
630:
627:
621:
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612:
609:
603:
600:
594:
591:
585:
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573:
564:
561:
555:
552:
325:Reggiane Re.2004
245:Reggiane Re.2004
190:Reggiane Re.2004
186:Reggiane Re.2005
107:Isotta Fraschini
83:
67:Isotta Fraschini
53:
28:
16:
976:
975:
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929:
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698:Storia Militare
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539:
534:
514:Rolls-Royce Exe
490:
468:
459:Cooling system:
422:
349:
339:
292:
215:
207:Reggiane Re 103
162:
153:
148:
127:
81:
52:National origin
51:
12:
11:
5:
974:
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837:
832:
826:
824:
823:Piston engines
820:
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809:
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327:
322:
317:
314:Caproni Ca.350
311:
305:
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288:
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283:
280:
273:
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261:
258:
255:
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237:
236:Zeta R.C.24/60
234:
231:
230:Zeta R.C.22/50
228:
225:
224:Zeta R.C.21/60
222:
219:
218:Zeta R.C.15/45
214:
211:
192:were ordered.
161:
158:
152:
149:
147:
144:
126:
123:
90:
89:
84:
82:Developed from
78:
77:
74:
70:
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60:
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54:
48:
47:
39:
35:
34:
30:
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851:
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843:
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836:
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825:
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817:
814:
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802:
800:
795:
793:
788:
787:
784:
776:
774:1-2584-4296-5
770:
766:
761:
750:
746:
741:
737:
735:0-7509-4479-X
731:
727:
722:
718:
716:0-8317-3939-8
712:
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703:
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531:
527:
524:
523:
522:
521:
520:Related lists
515:
512:
510:
509:Napier Dagger
507:
505:
502:
500:
497:
496:
495:
494:
487:
482:
480:
476:
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472:Power output:
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428:
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282:Zeta R.C.50SD
281:
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63:Manufacturer
62:
61:
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55:
50:
49:
46:
43:
40:
37:
36:
31:
27:
22:
17:
924:
816:aero engines
764:
752:. Retrieved
748:
725:
706:
697:
688:
679:
670:
663:Bibliography
648:. Retrieved
644:
634:
625:
616:
607:
598:
589:
580:
575:Pearce, 2017
559:
519:
518:
492:
491:
477:
471:
458:
450:
443:Supercharger
441:
425:
406:
400:
394:
388:
381:Displacement
379:
370:
361:
352:
341:
340:
302:Breda Ba.201
290:Applications
275:Version for
203:
194:
163:
154:
128:
95:
93:
870:Asso Caccia
754:4 September
650:5 September
466:Performance
415:Air starter
272:Zeta R.C.45
266:Zeta R.C.42
260:Zeta R.C.40
254:Zeta R.C.35
160:Development
940:Categories
532:References
461:Air-cooled
451:Fuel type:
427:Valvetrain
420:Components
408:Dry weight
125:Background
100:air cooled
73:First run
42:Air cooled
961:X engines
855:Asso 1000
437:camshafts
342:Data from
310:(unbuilt)
890:Astro 14
865:Asso XII
850:Asso 750
845:Asso 500
840:Asso 200
835:Asso 100
488:See also
454:Gasoline
357:X engine
213:Variants
182:Reggiane
103:X engine
885:Astro 7
860:Asso XI
830:Asso 80
401:Height:
389:Length:
304:(trial)
98:was an
880:Asso L
875:Asso A
771:
732:
713:
433:valves
395:Width:
372:Stroke
241:Wright
151:Design
905:Gamma
900:Delta
537:Notes
483:6.5:1
353:Type:
119:Gamma
76:1941
57:Italy
38:Type
19:Zeta
925:Zeta
895:Beta
769:ISBN
756:2018
730:ISBN
711:ISBN
652:2018
431:Two
363:Bore
247:and
132:K.14
94:The
920:V.6
915:V.5
910:V.4
942::
747:.
643:.
568:^
545:^
805:e
798:t
791:v
777:.
758:.
738:.
719:.
654:.
481::
445::
429::
410::
383::
374::
365::
251:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
