26:
160:
88:
first produced in 1934. The design ran at higher speeds than conventional engines, and used reduction gearing to lower the speed of the propeller. This led to a noticeable off-centre mounting for the propeller. The
Niagara was a popular engine for light and experimental aircraft, well regarded due to
133:
Larger version of the basic
Niagara. Bore/stroke 81 x 87 mm (3.19 x 3.43 in), swept volume 3,138 cc (191.5 cu in). Compression 8.0:1, gearing 0.47:1. Normal continuous power 125 hp (93 kW) at 4,000 rpm at sea
142:
De-rated, uncowled versions of
Niagara I-III with simple inter-cylinder baffles for cooling and trickle-down lubrication for lower exhaust rockers. Compression 5.7:1, gearing 0.47:1.
101:
Bore/stroke 77 x 87 mm (3.03 x 3.43 in), swept volume 2,835 cc (173 cu in). Compression 6.25:1, gearing 0.47:1. Normal continuous power 84 hp (63 kW) at 3,200 rpm at sea level.
109:
Bore/stroke 77 x 87 mm (3.03x3.43 in), swept volume 2,835 cc (173 cu in). Compression 6.0:1, gearing 0.39:1. Normal continuous power 84 hp (63 kW) at 3,200 rpm at sea level.
801:
727:
117:
Bore/stroke 77 x 87 mm (3.03x3.43 in), swept volume 2,835 cc (173 cu in). Gearing 0.47:1. Normal continuous power 88 hp (66 kW) at 3,300 rpm at sea level.
796:
674:
658:
644:
626:
305:
791:
720:
210:
205:
125:
Similar to
Niagara III but with a higher operating rpm. Normal continuous power 98 hp (73 kW) at 3,500 rpm at sea level.
713:
321:
520:
283:
337:
185:
168:
34:
25:
696:
471:
278:
44:
387:
245:
328:
remains airworthy in 2017 and displays to the public at home airshows during the flying season.
691:
670:
654:
640:
622:
462:
240:
736:
60:
739:
378:
261:
85:
50:
150:
Direct drive version of
Cataract I. Normal continuous power 66 hp (49 kW) at 2,100 rpm.
430:
293:
266:
215:
599:
785:
508:
369:
230:
180:
81:
47:
317:
220:
200:
164:
503:
250:
235:
195:
418:
402:
325:
288:
255:
225:
190:
159:
89:
its small diameter, smooth operation, low noise and innovative engineering.
770:
765:
491:
705:
158:
709:
336:
A preserved Pobjoy
Niagara engine is on public display at the
639:. Cambridge, England. Patrick Stephens Limited, 1989.
653:. Marlborough, Wiltshire: Airlife Publishing, 2003.
721:
8:
728:
714:
706:
802:Aircraft air-cooled radial piston engines
651:British Piston Engines and their Aircraft
80:is a British seven-cylinder, air-cooled,
423:1 inlet and 1 exhaust valve per cylinder
163:Airworthy Pobjoy Niagara installed in a
537:
574:
572:
15:
578:Jane's All the World's Aircraft p.26d
562:
560:
558:
556:
554:
552:
550:
365:7-cylinder, air-cooled, radial engine
320:G-ACTF that is owned and operated by
7:
619:Jane's All the World's Aircraft 1938
586:
584:
458:98 hp at 3,625 rpm max at sea level
637:World Encyclopedia of Aero Engines
344:Specifications (Pobjoy Niagara IV)
14:
669:. Peterborough: GMS Enterprises.
33:Pobjoy Niagara on display at the
665:Ord-Hume, Arthur W.J.G. (2000).
24:
692:Pobjoy Niagara at oldengine.org
621:. London: David & Charles.
211:General Aircraft Fleet Shadower
206:General Aircraft Monospar ST-25
1:
797:1930s aircraft piston engines
602:Retrieved: 28 February 2017.
322:The Shuttleworth Collection
818:
746:
316:A Pobjoy Niagara powered
32:
23:
18:
667:British Light Aeroplanes
521:List of aircraft engines
284:Hafner A.R.III Gyroplane
792:Pobjoy aircraft engines
357:General characteristics
338:Science Museum (London)
186:Airspeed Fleet Shadower
169:Shuttleworth Collection
171:
35:Science Museum, London
697:"A New Pobjoy Engine"
472:Power-to-weight ratio
279:British Klemm Swallow
258:(half scale Stirling)
162:
600:www.shuttleworth.org
566:Lumsden 2003, p.179.
544:Gunston 1989, p.111.
617:Grey, C.G. (1972).
486:Related development
498:Comparable engines
332:Engines on display
246:Short Scion Senior
172:
779:
778:
676:978-1-870384-76-6
463:Compression ratio
392:173 cu in (2.8 L)
241:Shapley Kittiwake
74:
73:
809:
730:
723:
716:
707:
680:
632:
603:
597:
591:
588:
579:
576:
567:
564:
545:
542:
398:26.5 in (673 mm)
61:Pobjoy Airmotors
28:
16:
817:
816:
812:
811:
810:
808:
807:
806:
782:
781:
780:
775:
742:
734:
688:
683:
677:
664:
649:Lumsden, Alec.
635:Gunston, Bill.
629:
616:
612:
607:
606:
598:
594:
589:
582:
577:
570:
565:
548:
543:
539:
534:
529:
483:
452:
443:Cooling system:
414:
383:3.43 in (87 mm)
374:3.03 in (77 mm)
359:
346:
334:
314:
302:
275:
262:Spartan Clipper
177:
157:
95:
12:
11:
5:
815:
813:
805:
804:
799:
794:
784:
783:
777:
776:
774:
773:
768:
763:
758:
753:
747:
744:
743:
735:
733:
732:
725:
718:
710:
704:
703:
694:
687:
686:External links
684:
682:
681:
675:
662:
647:
633:
627:
613:
611:
608:
605:
604:
592:
590:Ord-Hume p.589
580:
568:
546:
536:
535:
533:
530:
528:
525:
524:
523:
512:
511:
506:
495:
494:
482:
479:
478:
477:
468:
459:
451:
448:
447:
446:
440:
434:
431:Claudel-Hobson
424:
413:
410:
409:
408:
407:130 lb (59 kg)
399:
393:
384:
375:
366:
358:
355:
345:
342:
333:
330:
313:
310:
309:
308:
306:Autogiro AC-35
301:
298:
297:
296:
294:Pitcairn PA-22
291:
286:
281:
274:
271:
270:
269:
267:Westland CL.20
264:
259:
253:
248:
243:
238:
233:
228:
223:
218:
216:Gribovsky G-25
213:
208:
203:
198:
193:
188:
183:
176:
173:
156:
153:
152:
151:
148:
144:
143:
140:
139:Cataract I-III
136:
135:
131:
127:
126:
123:
119:
118:
115:
111:
110:
107:
103:
102:
99:
94:
91:
78:Pobjoy Niagara
72:
71:
68:
64:
63:
58:
54:
53:
42:
38:
37:
30:
29:
21:
20:
13:
10:
9:
6:
4:
3:
2:
814:
803:
800:
798:
795:
793:
790:
789:
787:
772:
769:
767:
764:
762:
759:
757:
754:
752:
749:
748:
745:
741:
738:
731:
726:
724:
719:
717:
712:
711:
708:
702:
699:- article in
698:
695:
693:
690:
689:
685:
678:
672:
668:
663:
660:
659:1-85310-294-6
656:
652:
648:
646:
645:1-85260-163-9
642:
638:
634:
630:
628:0-7153-5734-4
624:
620:
615:
614:
609:
601:
596:
593:
587:
585:
581:
575:
573:
569:
563:
561:
559:
557:
555:
553:
551:
547:
541:
538:
531:
526:
522:
519:
518:
517:
516:
515:Related lists
510:
509:Warner Scarab
507:
505:
502:
501:
500:
499:
493:
490:
489:
488:
487:
480:
475:
473:
469:
466:
464:
460:
457:
456:Power output:
454:
453:
449:
444:
441:
438:
435:
432:
428:
425:
422:
420:
416:
415:
411:
406:
404:
400:
397:
394:
391:
389:
385:
382:
380:
376:
373:
371:
367:
364:
361:
360:
356:
354:
353:
350:
343:
341:
339:
331:
329:
327:
323:
319:
311:
307:
304:
303:
299:
295:
292:
290:
287:
285:
282:
280:
277:
276:
272:
268:
265:
263:
260:
257:
254:
252:
249:
247:
244:
242:
239:
237:
234:
232:
231:Pobjoy Pirate
229:
227:
224:
222:
219:
217:
214:
212:
209:
207:
204:
202:
199:
197:
194:
192:
189:
187:
184:
182:
181:Aeroput MMS-3
179:
178:
174:
170:
166:
161:
154:
149:
146:
145:
141:
138:
137:
132:
129:
128:
124:
121:
120:
116:
113:
112:
108:
105:
104:
100:
97:
96:
92:
90:
87:
83:
79:
69:
66:
65:
62:
59:
57:Manufacturer
56:
55:
52:
49:
46:
43:
40:
39:
36:
31:
27:
22:
17:
760:
755:
750:
740:aero engines
700:
666:
650:
636:
618:
610:Bibliography
595:
540:
514:
513:
497:
496:
485:
484:
470:
461:
455:
442:
436:
427:Fuel system:
426:
417:
401:
395:
388:Displacement
386:
377:
368:
362:
351:
348:
347:
335:
318:Comper Swift
315:
221:Lambach HL.I
201:Comper Swift
165:Comper Swift
155:Applications
77:
75:
504:Rotec R2800
450:Performance
433:carburettor
251:Short Scion
236:Saro Shrimp
196:Comper Kite
114:Niagara III
86:aero-engine
51:aero engine
786:Categories
527:References
476:0.75 hp/lb
445:Air-cooled
437:Fuel type:
419:Valvetrain
412:Components
403:Dry weight
326:Old Warden
289:Hendy Hobo
256:Short S.31
226:Moss M.A.1
191:CLW Curlew
122:Niagara IV
106:Niagara II
67:First run
439:70 octane
396:Diameter:
349:Data from
312:Survivors
130:Niagara V
98:Niagara I
756:Cataract
492:Pobjoy R
481:See also
352:Lumsden.
273:Cataract
93:Variants
19:Niagara
761:Niagara
751:Cascade
300:Cascade
175:Niagara
167:at the
147:Cascade
737:Pobjoy
701:Flight
673:
657:
643:
625:
379:Stroke
134:level.
82:radial
48:radial
45:Piston
532:Notes
363:Type:
70:1934
41:Type
671:ISBN
655:ISBN
641:ISBN
623:ISBN
370:Bore
76:The
467:6:1
788::
583:^
571:^
549:^
429:1
340:.
324:,
84:,
771:R
766:P
729:e
722:t
715:v
679:.
661:.
631:.
474::
465::
421::
405::
390::
381::
372::
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
