Improved ASW version of Wessex HAS.1 with more powerful 1,600 shp NGa.18 Mk.165 Napier Gazelle turboshatft engine. Three prototypes built and 42 conversions from HAS.1.
During 1965, Rolls Royce bought out the Napier engine company (manufacturers of the Gazelle), which resulted in a shortage of engine spares and subsequent problems with Wessex operations on HMS Bulwark and HMS Kent.
Specifications  
List of Operators of Westland Wessex HAS.3  
From  Organisation with model Wessex HAS.3  
1956 
 
1958 
 
1961 

Construction Numbers on database of Wessex HAS.3  

Construction Numbers  Help Us  
C/N  Year  History  
wa 8  1959  XM327 : has.1 RN Wessex HAS.1 f/f 22sep59, d/d 05oct59; scr Warsash C+ XM327 : HAS.1 Westland development & trials airframe from late + XM327 : 22jul79 coded 401KE with HMS Kent HAS.3 819 Sq/531 by May 1968; 820Sq/411BL by Feb 1972+ 15 Jun 1972 Aboard HMS Blake as 820 Sq / 411BL, while + XM327 : to College of Maritime Studies, Warsash by Dec 1982 sti+  
wa 9  1959  XM328 : has.1 RN HAS.1 d/d Feb60
XM328 : Westlands Oct59 before first flight; A&AEE Sep61; Westl+ XM328 : 22jul79 coded 653PO As HAS.3, 737 Sq/522PO by Jul 1968 still Jul 1971; 7+ XM328 : acquired in 2004 by the Helicopter Museum, Westonsuper+ Nov16 completed 7year restoration at The Helicopter Mu+ 03Dec16 pictured at International Helicopter Museum, af+  
wa 14  1960  XM833 : has.1 Westland Wessex HAS.1, c/n WA014, f/f:?; del Royal Navy+ dd 27 Sep 1960, HAS.1 700Sq(H)/507 by Jun 1960, 706Sq/5+ 814Sq/272V by Jul 1968, 814Sq/272H by 1969, 820Sq/412+ 28 Aug 1971 Aboard HMS Blake as 820 Sq / 412BL, while + 15 Jun 1972 Aboard HMS Blake as 820 Sq / 412BL, while + 737Sq/656PO by Aug 1974; SoC Nov 1981; Wroughton store+ Pres. SWWAPS Lasham by Mar 1983 still Jul 1985 still Ma+ preserved North East Aircraft Museum, Sunderland by Apr+  
wa 15  1960  XM834 : has.1 Westland Wessex HAS.1 del Royal Navy 29sep60; conv HAS.+ 700Sq(H)Sq/508 by Oct 1960, 706Sq/508 by Jan 1962, 814S+ A&AEE Boscombe Down by Dec 1966, 700H Sq/580CU by May + to Odiham dump still as /570 by Jan 1976  
wa 17  1961  XM836 : has.1 Westland Wessex HAS.1, c/n WA017, f/f:?; del Royal Navy+ XM836 : ff 25 May 1960, HAS.1 Westland for cold weather trials. XM836 : 700H Sq/510 by Apr 1961, 706Sq/510CU by Jan 1962 XM836 : to Westland for prototype HAS.3 conv Oct 1964 to Jun 19+ XM836 : 737 Sq Fife Flt/404FF by Oct 1971 still Oct 1972, 737 + 22jul79 coded 651PO  
wa 18  1961  XM837 : has.1 Westland Wessex HAS.1, c/n WA018, f/f:?; del Royal Navy+ XM837 : spent winter of 1960/61 in Churchill, Canada with A&AEE+ XM837 : Westland trials and evaluation airframe until very earl+ XM837 : Now HAS.3, 814Sq/271V by Oct 1967, 814Sq/271H by May + 2 Jul 1971 Aboard HMS Blake as 820 Sq / 411BL, while i+ 737 Sq Norfolk Flt/407NF by Jan 1975, deployed from No+ 737 Sq Norfolk Flt/407NF, flying at Navy Days, 26 and + 737Sq/400GL noted at Culdrose, 11 Mar 1982 As HAS.3 737 Sq/400GL on HMS Glamorgan, when destroyed+  
wa 19  1961  XM838 : has.1 Westland Wessex HAS.1 d/d 09jul61; conv HAS.3 706Sq/508CU by 1965, 706Sq/570CU by Jul 1965. Conv to+ 737 Sq/520PO by Sep 1968 still 1969. 820Sq/412BL by A+ 19751978, XM838 in its Mk 3 Anti submarine role whilst+ 22jul79 coded 605LN with HMS London At AES Lee May 1984. Perished Predannack 08/1995. 06aug89 pictured at Predannack Airfield, Cornwall  
wa 25  1961  XM844 : has.1 Westland Wessex HAS.1, c/n WA025, f/f:?; del Royal Navy+ 815Sq/302R by Sep 1961, 815Sq/302C by Mar 1963, 814Sq+ to Westland for HAS.3 conversion 1965 completed by 1967+ 28 Aug 1971 Aboard HMS Blake as 820 Sq / 413BL, while + 15 Jun 1972 Aboard HMS Blake as 820 Sq / 413BL, while + RNAY Wroughton by Jan 1973. RNAY Fleetlands by Mar 1975+ 737Sq Devonshire Flt/403DV by Sep 1976. crashed on tak+  
wa 30  1961  XM871 : has.1 Westland Wessex HAS.1, c/n WA030, f/f:?; del Royal Navy+ HAS.1 700H Sq/507 by Aug 1961, 706Sq/507CU by Jan 1962+ Conv HAS.3 Sep 1964Mar 1966 As HAS.3, 820Sq/410BL by Aug 1971 until at least Sep 1+ 15 Jun 1972 Aboard HMS Blake as 820 Sq / 410BL, while + Engadine Flt/410EN by Dec 1973, 737 Sq Glamorgan Flt/4+ As HAS.3, w/o 21 Aug 1975 with 737 Sq/400GL when it cr+  
wa 31  1961  XM872 : has.1 Westland Wessex HAS.1, c/n WA031, f/f:?; del Royal Navy+ 819 Sq/320 by Jan 1962, still 1965. noted 22jul79 at HMS Osprey RNAS Portland coded 662PO To Westland early 1966 for conv to HAS.3, completed mid+  
wa 40  1961  XM919 : has.1 Westland Wessex HAS.1, c/n WA040, f/f:?; del Royal Navy+ HAS.1, 814Sq/342H by Jan 1962, 814Sq/342V by Jul 1963+ XM919 : conv HAS.3 by May 1967, trials in USA and Canada. dd Fl+ XM919 : RNAY Sembawang by Aug 1970, 737 Sq Glamorgan Flt/400GL+  
wa 41  1961  XM920 : has.1 Westland Wessex HAS.1, c/n WA041, f/f:?; del Royal Navy+ HAS.1 trials aboard HMS Devonshire between 13 Nov and 2+ HAS.3 826 Sq / 143E by Oct 1968, heavy landing SW of + to Arbroath (A2594) by May 1969 to Lee by Jul 1970 to scrapyard in Birmingham by mid 1974 Conversion to HAS.3 between Mar 1967 and Aug 1968 at Ye+  
wa 44  1961  XM923 : has.1 Westland Wessex HAS.1, c/n WA044, f/f:?; del Royal Navy+ Devonshire Flt /989D by Mar 1962, attended launch of H+ Ark Royal SAR Flt/052R by Jul 1965. To Westland Yeovil+ At SBAC Farnborough Air Show Sep 1968 as Wessex HAS.3, +  
wa 48  1962  XM927 : has.1 Westland Wessex HAS.1 d/d 08jan62; conv HAS.3; to Shawb+ 705 Sq/05CU by May 1964 HAS.3 conversion, 737 Sq/430PO by 1968, 737 Sq/660PO + 22jul79 coded 660PO Oct92 pictured on the fire dump at RAF Shawbury  
wa 54  1962  XP103 : has.1 Westland Wessex HAS.1, c/n WA054, f/f: 20/01/1962; del + 845Sq/AA by Apr 1962, 845Sq/WB by Apr 1964; 737 Sq/52+ HAS.3 706Sq/571CU by Mar 1969, w/o 11 Feb 1970 with 7+ Wreckage recovered to Falmouth; to AIU Lee Feb 1970; fo+  
wa 55  1962  XP104 : has.1 Westland Wessex HAS.1, c/n WA055, f/f:?; del Royal Navy+ 845Sq/BA by May 1962, heavy landing after losing powe+ HAS.3 820Sq/412BL by Apr 1969, 820Sq/410BL by Sep 19+ 2 Jul 1971 Aboard HMS Blake as 820 Sq / 410BL, while i+ w/o 6 Jan 1972 with 820Sq, ditched in the Mediterranean+  
wa 56  1962  XP105 : has.1 Westland Wessex HAS.1, c/n WA056, f/f:?; del Royal Navy+ ff 7 feb 1962. 845Sq/CA "Claude" by Jun 1962. After se+ conv to HAS.3 by Jun 1967; 706Sq/567CU by Oct 1967; 81+ 737 Sq Devonshire Flt/403DV by Apr 1974 and served in + Still /403DV Devonshire Flt Feb 1977, ditched off Port+ Wreck to AES LeeonSolent by Aug 1978 and used as GI A+  
wa 61  1962  XP110 : has.1 Westland Wessex HAS.1, c/n WA061, f/f:?; del Royal Navy+ HAS.1 del RN Apr 1962; 737 Sq /776PO Jul 1962, later b+ to Yeovil for HAS.3 conversion Nov 1965. completed May + HAS.3 706 Sq / 568CU Jul 1967; Wroughton store by Apr + 737 Sq / 665PO by May 1976; 737 Sq Antrim Flt (loan ?+ w/o 15sep78 ditched into the English Channel 15m off Po+ Wreck recovered and repairs at Fleetlands started Oct 1+ 737 Sq/655PO in flying display at RNAY Fleetlands Jun + Wroughton by Jan 1984; Fleetlands by Apr 1985 as G I. A+ Noted at AESS HMS Sultan 28may99 coded 55FL  
wa 70  1962  XP137 : has.1 Westland Wessex HAS.1, c/n WA070, f/f:?; del Royal Navy+ 22jul79 coded 652PO HAS.1 737 Sq/770PO by Aug 1962, 737 Sq/520PO by Jan 1+ to Yeovil for conversion to HAS.3 by Mar 1966, complete+ HAS.3 737 Sq Antrim Flt/406AN Aug 1970 still May 1971+ HAS.3 737 Sq Norfolk Flt by Sep 1974; 737 Sq Devonshir+ Wroughton store by Dec 1982; AES Lee (A2710) by Oct 19+ G.I. Predannack 12 May 2004, still Aug 2005 (upright), +  
wa 75  1962  XP142 : has.1 Westland Wessex HAS.1, c/n WA075, f/f: 18/06/1962; del + HAS.1 845Sq/JA by Aug 1962, 845Sq/JB by Jun 1964; (A+ conv to HAS.3 by Sep 1967 complete by Jul 1969; 814 + HAS.3 led insertion of Special Forces as 737 Sq/406AN+ as 737 Sq/406AN, attacked and damaged ARA Santa Fe out+ Damaged when HMS Antrim attacked in Falkland Sound, rep+  
wa 83  1962  XP150 : has.1 RN Wessex HAS.1 d/d 05oct62; conv HAS.3; to Moretonin+ 706Sq/506CU by Mar 1964, 706Sq/576CU by Dec 1965, to + 814Sq/273V by Mar 1968, 814Sq/273H by 1969, 737 Sq Ke+ 25aug78 pictured as 737 NAS /406AN with Fishery Protec+ 22jul79 coded 606AN with HMS Antrim 737Sq HQ Flt uncoded by Mar 1982 until Dec 1982, 737 Sq+ XP150 Fire Service College : G.I. National Fire College MoretoninMarsh by Apr 1993+  
wa 86  1962  XP153 : has.1 Westland Wessex HAS.1, c/n WA086, f/f:?; del Royal Navy+ 706Sq/502CU by Sep 1963, to Yeovil c May 1967 for HAS.+ 826Sq/143E by Dec 1968, w/o 25 Nov 1969 with 826Sq (HM+  
wa 89  1962  XP156 : has.1 Westland Wessex HAS.1, c/n WA089, f/f:?; del Royal Navy+ HAS.1 Hampshire Flt / 902HA, recoded /472HA by Jan 19+ 826Sq/144E by Dec 1968, 737 Sq/663PO by Jul 1976 stil+ noted 22jul79 at HMS Osprey RNAS Portland coded 663PO + R.I.P:; CRADDOCK, Roger A, Lieutenant C021043W; LEWIS,+  
wa 98  1963  XS119 : has.1 Westland Wessex HAS.1, c/n WA098, f/f:?; del Royal Navy+ 1964 with HMS Eagle to far east as 292E Conversion to HAS.3, completed Dec 1966 HAS.3 700H Sq/583CU by May 1967; 814 NAS /273V by O+ Aug 1973 to Fleetlands Jul 1974 to Wroughton store 737 NAS / 665PO by Feb 1976. On 3 May 1976, undercarr+ 22jul79 coded 655PO Nov 1982 to AES LeeonSolent, still in 737 Sq marks as+ to Predannack around May/Jun 1986 minus tail section. S+  
wa100  1963  XS121 : has.1 Westland Wessex HAS.1, c/n WA100, f/f:?; del Royal Navy+ HAS.1 A&AEE by Aug 1964, 820Sq/295E by Nov 1964, ditch+ UK for repair and became 3rd conversion to HAS.3, 700H +  
wa101  1963  XS122 : has.1 820Sq/290E by Jul 1965, 820Sq/060E by 1966, to Yeovil+ 819 Sq/532 by Jun 1968, 737 Sq/435PO by Mar 1972, 737S+ RNEC Manadon by May 1980 until at least 1993. Noted within grounds of HMS Sultan, Gosport 28may99 cod+ To A2707 LeeonSolent by Jun 1994, to A2632 G.I. Fort + Westland Wessex HAS.1, c/n WA101, f/f:?; del Royal Navy+  
wa105  1963  XS126 : has.1 Westland Wessex HAS.1, c/n WA105, f/f:?; del Royal Navy+ 820Sq/294E by Nov 1964, 815Sq/056 by Aug 1966, to Yeov+ 826Sq/142E by Nov 1968, w/o 9 Sep 1969 with 826Sq, dit+  
wa108  1963  XS149 : has.1 Westland Wessex HAS.1, c/n WA108, f/f:?; del Royal Navy+ HAS.1 845Sq/OB by Mar 1965, 819 Sq/530 by Jan 1966 sti+ Conv to HAS.3 829Sq Fife Flt/403FF by May 1969, 737Sq + 24jul93 pictured preserved at International Helicopter + 22 Sep 2018 in open storage, partially covered by tarpa+  
wa112  1963  XS153 : has.1 Westland Wessex HAS.1, c/n WA112, f/f:?; del Royal Navy+ 706Sq/T Jan 1964, 845Sq/T by Mar 1964, crashed Sarawak + 700H Sq/581CU by Mar 1967, 814Sq/272V by Jan 1968, 73+ To G.I. RNEC Manadon by Jul 1987 G.I. Sennelager, Germany by Dec 1991.  
wa239  1964  XT255 : Westland Wessex HAS.3 preproduction, WA239, f/f 03/11/+ Jun65 engine handling trials carried out at Boscombe to RAF Carlisle as crash / rescue GI trainer by Jun 198+  
wa240  1965  XT256 : Westland Wessex HAS.3 preproduction, WA240, f/f 1965; + AES Lee (A2615) by Mar 1978 RN noted 21jul79 at HMS Daedalus RNAS LeeonSolent wit+  
wa241  1965  XT257 : Westland Wessex HAS.3 preproduction, WA241, f/f 09/05/+ XT257 : converted to HAS.3 prototype while on HAS.1 line, Westl+ XT257 : 1 SoTT RAF Halton by 1981, still Apr 1982, to 8719M at + pres. East Grinstead by Oct 1998 to Bournemouth Aviation Museum on 20 Jan 2005 (painted +  
wa242  1965  XS862 : has.1 Westland HAS.1, c/n WA242, f/f: 15/04/1965, del Royal N+ 22jul79 coded 650PO To Westland Yeovil for HAS.3 conv Dec 1966, NASU Culdro+ HAS.3 to NBCDC Winterbourne Gunner by Nov 1989; at DSTL+ XS862 : to Air and Ground, Hixon autumn 2000. Gone by Dec 2010 