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was extremely difficult, requiring re-engineered rotors and/or altered motion within the chambers. Instead, modifications were made in similar style to two-stroke engines, by changes to the internal ports controlling intake mixture and waste gases, in conjunction with enhanced carburation and exhaust
124:
After recognising the engine was capable of producing much more power, Crighton firstly received no backing from Norton management, instead developing the engine in his own time, until sanctioned by the factory in late 1987 with the prototype race bike debuted by Norton employee
Malcolm Heath at
174:
confirmed in 1988 that
Crighton had used since 1972, "...some years before Honda, who later claimed it as one of their innovatory applications...", and a longer induction-length. Power output was stated to be raised from road-going 79 bhp to 130 bhp, or with maximum ram-effect at a
248:
Crighton left Norton in
September 1990, following the appointment of Barry Symmons (previously chief of the Honda Britain motorcycle racing squad) as Race Team Manager in early 1990, with Crighton retained for consultancy work. Crighton subsequently developed a shadow-project which he named
317:
411:, with engine chambers enlarged to 700 cc, and using a sealed, pressurised-gas cooling system powered by an external, belt-driven pump circulating the gas through an intercooler mounted in the seat-tailpiece. This allows the engine, designated
186:
and Dymag wheels. The revised induction system was simplified, abandoning the road system where the cooling air was routed through the engine rotors before being fed into the carburettors. Instead, exhaust-gas velocity was used with a
264:
Crighton aspired to pursue backing from Chris
Oldfield, an Australian businessman and a potential investor who intended to manufacture the machines and run his own race team with Australian riders Grant Hodson and Wayne Clark.
75:
race, the first time Norton had won the class since 1961, and Ian
Simpson won the 1994 British Superbike Championship. The unique Wankel engine configuration measured at a capacity of 588 cc was accepted by the
194:
Crighton confirmed the usual method of modifying a road engine for racing was to replace the essential components of crankshaft, conrods, pistons and camshafts – but the rotary had none of these. Even raising the
297:
234:
Subsequent temporary riders covering for injuries included Terry Rymer and Andy McGladdery. The team won the
British Formula One Championship with rider Steve Spray in 1989.
468:
In respect to the 588 engine it has a thinner intermediate plate of 22 mm and wider rotor housings of 80 mm, but after all it is 5 mm narrower overall. It produces 220
51:
Racing started in late 1987 with employee
Malcolm Heath as development rider on a limited budget, then with a six-man team from 1989 including riders Trevor Nation and
804:
608:
1353:
726:
77:
40:
is a Works Racing motorcycle, produced for the 1988 to 1994 racing seasons, initially with an air-cooled version of the road-going twin-rotor
992:
372:
282:
203:
Initially the team raced with a limited budget in 1988 with riders Trevor Nation and Simon
Buckmaster, having some sponsorship from
508:
884:
258:
858:
786:
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326:'s updated Norton NRV588 rotary racer with Spondon frame and single, side-mounted rear suspension unit developed for the
830:
1205:
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45:
965:
368:
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on the engine, as when racing, the machines were moving at much higher speeds than the road-going types, where
22:
191:
to create a low pressure area that dragged the air through the engine components and into the exhaust system.
1158:
118:
750:
117:
in 1984 from a background in electronic engineering to oversee the service department's maintenance of the
81:
1348:
978:
1327:
928:
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419:
for his semi-works Norton rotary, to produce 200 bhp and remain within safe working temperatures.
375:
in 1994 on a Team
Crighton Norton rotary machine with Duckhams sponsorship, an oil brand name owned by
132:
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1112:
1107:
1001:
388:
327:
1097:
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114:
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Brian
Crighton continued to develop the Rotary Norton NRV588 concept for Stuart Garner, owner of
110:
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56:
455:
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8:
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399:-based frame specialist Spondon Engineering, which became fully owned by Norton in 2013.
335:
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A limited-production road-going version was subsequently developed, initially designated
30:
228:
1215:
592:"JPS Norton - JPSNorton.com when the British rotary engined racers ruled UK superbikes"
216:
18:
121:
for the Police Force, and was responsible for establishing Norton's return to racing.
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26:
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on a Harris-framed JPS Norton NRS588 racer at the 1991 Donington British Grand Prix
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Based on an ex-police bike engine, it was restricted to club-level racing as the
106:
59:, the Norton Rotary achieved significant racing success with riders Steve Spray,
862:
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392:
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220:
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25:'s 1994 Championship-winning Crighton Norton RCW588 in its last guise wearing
1342:
1245:
805:"At home in Donington Hall with Stuart Garner of Norton Motorcycles (UK) Ltd"
355:
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had not decided on how to categorise the rotary engine as it was so unusual.
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41:
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The engine was basically similar to the road version, but fitted into a
166:
had experienced overheating when in slow-moving convoys. Also added was
1137:
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The RCW588 had a number of racing successes at circuits including the
1250:
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643:
304:
289:
273:
179:
72:
395:, again using an aluminium twin-spar beam frame and swinging arm by
611:
109:
in the 1970s, the racing engine was nevertheless the creation of
67:, together with stand-in riders Andy McGladdery and Terry Rymer.
253:, again with Spray, which competed in the Australian GP held at
591:
415:, echoing the earlier 1990s era when he also used the term
407:
Crighton has further-developed his own machine, designated
509:"Norton Rotary Racing Development- Middle Years 1991-1992"
154:
One of the initial changes for racing was to reduce the
831:"Norton: 'What we learned last year created this bike'"
672:(UK weekly newspaper) 12 September 1990, pp.cover, 25.
376:
689:, June 1988, p.Cover, p.251. Accessed 30 January 2019
609:
Racing Nostalgia: Steve Hislop and the 1992 Senior TT
727:"Stuart Garner, the New Face of Norton Motorcycles"
556:, January 1989, pp.41-43. Accessed 4 February 2019
548:
546:
544:
542:
540:
538:
536:
534:
580:, June 1988, pp.269-276. Accessed 30 January 2019
170:induction from fairing-mounted air scoops, which
48:soon followed by watercooled versions from 1989.
1340:
676:, Mat Oxley. Accessed and added 23 October 2015
632:, Mat Oxley. Accessed and added 26 October 2015
628:(UK weekly newspaper) 12 September 1990, p.25.
572:
570:
568:
566:
564:
562:
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614:, 27 December 2013. Retrieved 30 December 2019
259:placing 15th with one World Championship point
986:
794:, 23 February 2011. Retrieved 23 October 2015
699:
697:
695:
663:
661:
659:
657:
559:
365:, Cadwell Park, Mallory Park and Thruxton.
993:
979:
758:, 31 July 2003. Retrieved 18 December 2015
692:
97:Tracing its origins to the motor from the
80:in 1990, allowing the Norton to enter the
708:(UK weekly newspaper) 24 April 1991, p.9
654:
617:
346:
303:Brian Crighton with his Spondon-framed,
236:
131:
17:
1341:
1000:
720:
718:
354:on the 'White Charger' Norton at 1992
1354:Motorcycles powered by Wankel engines
974:
725:Kerr, Ian (September–October 2009).
724:
712:. Accessed and added 23 October 2015
182:Spondon aluminium frame with Kayaba
175:high-speed circuit of 140 bhp.
715:
113:, who joined the Norton factory at
13:
644:"The JPS Norton Team - JPS Norton"
14:
1365:
954:
767:
641:
589:
342:
227:were replaced for racing by Amal
316:
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29:company livery displayed at the
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674:Crighton shock for Norton Team
635:
630:Go ahead for Norton GP attack
602:
583:
501:
373:British Superbike Championship
311:in 1993 (ridden by Jim Moodie)
87:
1:
494:
7:
770:"Race Results - JPS Norton"
71:achieved a win at the 1992
10:
1370:
1328:List of Norton motorcycles
751:Motorcycling mourns Hislop
1305:
1282:Norton Motorcycle Company
1274:
1238:
1206:Commando Production Racer
1193:
1177:
1146:
1015:
1008:
787:BP plans to sell Duckhams
422:
402:
382:
101:devised and developed by
685:Norton's Racing Rotary,
576:Norton's Racing Rotary,
272:, becoming known as the
115:Shenstone, Staffordshire
92:
1297:Norton Villiers Triumph
1287:Associated Motor Cycles
945:crightonmotorcycles.com
941:"CR700W SPECIFICATIONS"
140:air-cooled engine with
710:Roton's on right track
389:Norton Motorcycles Ltd
358:
245:
144:
84:premier racing class.
82:500 cc Grand Prix
57:John Player & Sons
33:
885:"RT700 Rotron engine"
350:
255:Eastern Creek circuit
240:
164:RAC breakdown patrols
135:
55:. With major sponsor
21:
519:on 16 September 2018
483:= 1.36 MPa) and 105
456:Chamber displacement
449:Rotor housing width
229:slide-operated units
966:Spondon Engineering
731:Motorcycle Classics
1349:Norton motorcycles
1216:John Player Norton
1002:Norton motorcycles
891:on 21 October 2019
839:. 20 November 2014
431:Generating radius
359:
246:
145:
34:
1336:
1335:
1261:Cromie McCandless
1234:
1233:
865:on 13 August 2015
859:"CR700P Tbe Bike"
811:. 20 January 2015
774:www.jpsnorton.com
648:www.jpsnorton.com
596:www.jpsnorton.com
552:A simple engine,
513:Norton Motors Ltd
427:Engine geometry:
356:TT race startline
217:Amal carburettors
197:compression ratio
142:full cooling fins
1361:
1318:Featherbed frame
1275:Parent companies
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887:. Archived from
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861:. Archived from
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578:Motorcycle Sport
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554:Motorcycle Sport
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515:. Archived from
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219:. The roadgoing
200:gas extraction.
172:Motorcycle Sport
156:cooling-fin area
119:Norton Commander
53:Simon Buckmaster
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955:External links
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487:at 9500 rpm (p
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393:Donington Hall
384:
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363:Isle of Man TT
344:
343:Racing results
341:
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334:, seen at the
328:Norton company
324:Michael Dunlop
322:
315:
313:
309:Donington Park
302:
295:
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209:Duckham's oils
160:traffic police
138:Norton Classic
111:Brian Crighton
99:Norton Classic
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768:Meads, Neil.
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590:Meads, Neil.
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500:
492:
491:= 1.30 MPa).
486:
482:
475:
471:
464:
457:
454:
452:
448:
446:
443:Equidistance
442:
440:
437:Eccentricity
436:
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336:2009 TT races
333:
332:Stuart Garner
329:
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103:David Garside
100:
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61:Robert Dunlop
58:
54:
49:
47:
43:
42:Wankel engine
39:
38:Norton RCW588
32:
31:2009 TT races
28:
27:Duckham's oil
24:
20:
16:
1256:Bert Hopwood
1225:
1185:961 Commando
1043:Norton Big 4
944:
935:
920:
905:
893:. Retrieved
889:the original
879:
867:. Retrieved
863:the original
853:
841:. Retrieved
834:
825:
813:. Retrieved
808:
799:
790:
782:
773:
763:
753:
746:
734:. Retrieved
730:
709:
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686:
681:
673:
667:
647:
637:
629:
623:
619:
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595:
585:
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553:
523:16 September
521:. Retrieved
517:the original
512:
503:
467:
458:
450:
444:
438:
432:
426:
416:
413:Rotron RT700
412:
408:
406:
386:
367:
360:
352:Steve Hislop
269:
267:
263:
250:
247:
233:
205:Dunlop tyres
202:
193:
177:
171:
153:
146:
123:
96:
69:Steve Hislop
50:
44:used in the
37:
35:
15:
1009:Motorcycles
791:Independent
439:e = 11.6 mm
369:Ian Simpson
288:Road-going
184:front forks
136:Road-going
127:Darley Moor
88:Development
23:Ian Simpson
1343:Categories
1169:Interpol 2
895:6 November
869:6 November
736:6 November
495:References
445:a = 0.5 mm
397:Derbyshire
307:Norton at
274:Norton F.1
242:Ron Haslam
65:Ron Haslam
1251:Doug Hele
1239:Designers
1159:Commander
1147:1981-1992
1123:Navigator
1058:Dominator
1016:1908-1978
843:1 January
815:1 January
755:Telegraph
472:at 10500
451:B = 80 mm
433:R = 71 mm
391:based at
305:twinshock
180:monoshock
73:Senior TT
1313:Dunstall
1118:Model 99
1113:Model 88
1108:Model 77
1103:Model 50
1073:Interpol
1048:Commando
612:Bennetts
485:lbf · ft
463:= 345 cm
371:won the
1178:2006 on
1154:Classic
1098:Model 7
1093:Mercury
1088:Manxman
1083:Jubilee
1063:Electra
929:YouTube
914:YouTube
225:CV type
189:venturi
168:Ram Air
46:Classic
1226:RCW588
1194:Racing
423:CR700W
417:Rotron
409:CR700P
403:CR700P
383:Legacy
330:owner
63:, and
1306:Other
1128:Nomad
1038:Atlas
1033:650SS
925:Video
910:Video
251:Roton
93:RC588
1221:Manx
897:2015
871:2015
845:2020
817:2020
738:2015
525:2018
215:and
162:and
36:The
1138:P11
1133:P10
1078:JPS
1068:ES2
1053:CS1
1023:16H
927:on
912:on
474:rpm
270:P55
223:of
149:ACU
107:BSA
105:at
78:FIM
1345::
1164:F1
943:,
833:.
807:.
772:.
729:.
717:^
694:^
656:^
646:.
594:.
561:^
533:^
511:.
489:me
480:me
470:hp
379:.
377:BP
290:F1
276:.
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