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 |
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| 1958 |
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| 1961 |
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| Construction Numbers on database of Wessex HAS.3 | ||||||
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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 401-KE with HMS Kent HAS.3 819 Sq/531 by May 1968; 820Sq/411-BL by Feb 1972+ 15 Jun 1972 Aboard HMS Blake as 820 Sq / 411-BL, 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 653-PO As HAS.3, 737 Sq/522-PO by Jul 1968 still Jul 1971; 7+ XM328 : acquired in 2004 by the Helicopter Museum, Weston-super+  Nov16 completed 7-year 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/272-V by Jul 1968, 814Sq/272-H by 1969, 820Sq/412+ 28 Aug 1971 Aboard HMS Blake as 820 Sq / 412-BL, while + 15 Jun 1972 Aboard HMS Blake as 820 Sq / 412-BL, while + 737Sq/656-PO 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/580-CU 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/510-CU by Jan 1962 XM836 : to Westland for prototype HAS.3 conv Oct 1964 to Jun 19+ XM836 : 737 Sq Fife Flt/404-FF by Oct 1971 still Oct 1972, 737 + 22jul79 coded 651-PO | |
| 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/271-V by Oct 1967, 814Sq/271-H by May + 2 Jul 1971 Aboard HMS Blake as 820 Sq / 411-BL, while i+ 737 Sq Norfolk Flt/407-NF by Jan 1975, deployed from No+ 737 Sq Norfolk Flt/407-NF, flying at Navy Days, 26 and + 737Sq/400-GL noted at Culdrose, 11 Mar 1982  As HAS.3 737 Sq/400-GL on HMS Glamorgan, when destroyed+ | |
| wa 19 | 1961 | XM838 : has.1 Westland Wessex HAS.1 d/d 09jul61; conv HAS.3 706Sq/508-CU by 1965, 706Sq/570-CU by Jul 1965. Conv to+ 737 Sq/520-PO by Sep 1968 still 1969. 820Sq/412-BL by A+ 1975-1978, XM838 in its Mk 3 Anti submarine role whilst+ 22jul79 coded 605-LN 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/302-R by Sep 1961, 815Sq/302-C by Mar 1963, 814Sq+ to Westland for HAS.3 conversion 1965 completed by 1967+ 28 Aug 1971 Aboard HMS Blake as 820 Sq / 413-BL, while + 15 Jun 1972 Aboard HMS Blake as 820 Sq / 413-BL, while + RNAY Wroughton by Jan 1973. RNAY Fleetlands by Mar 1975+ 737Sq Devonshire Flt/403-DV 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/507-CU by Jan 1962+ Conv HAS.3 Sep 1964-Mar 1966 As HAS.3, 820Sq/410-BL by Aug 1971 until at least Sep 1+ 15 Jun 1972 Aboard HMS Blake as 820 Sq / 410-BL, while + Engadine Flt/410-EN by Dec 1973, 737 Sq Glamorgan Flt/4+ As HAS.3, w/o 21 Aug 1975 with 737 Sq/400-GL 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 662-PO 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/342-H by Jan 1962, 814Sq/342-V 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/400-GL+ | |
| wa 44 | 1961 | XM923 : has.1 Westland Wessex HAS.1, c/n WA044, f/f:?; del Royal Navy+  Devonshire Flt /989-D by Mar 1962, attended launch of H+ Ark Royal SAR Flt/052-R 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/05-CU by May 1964 HAS.3 conversion, 737 Sq/430-PO by 1968, 737 Sq/660-PO + 22jul79 coded 660-PO 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/A-A by Apr 1962, 845Sq/W-B by Apr 1964, 737 Sq/52+ 706Sq/571-CU by Mar 1969, w/o 11 Feb 1970 with 706Sq, d+ | |
| wa 55 | 1962 | XP104 : has.1 Westland Wessex HAS.1, c/n WA055, f/f:?; del Royal Navy+ 845Sq/B-A by May 1962, heavy landing after losing power+ 820Sq/412-BL by Apr 1969, 820Sq/410-BL by Sep 1969 stil+ 2 Jul 1971 Aboard HMS Blake as 820 Sq / 410-BL, while i+ | |
| wa 56 | 1962 | XP105 : has.1 Westland Wessex HAS.1, c/n WA056, f/f:?; del Royal Navy+ ff 7 feb 1962. 845Sq/C-A "Claude" by Jun 1962. After se+ conv to HAS.3 by Jun 1967. 706Sq/567-CU by Oct 1967, 81+ 737 Sq Devonshire Flt/403-DV by Apr 1974 and served in + Still /403-DV Devonshire Flt Feb 1977, ditched off Port+ | |
| wa 70 | 1962 | XP137 : has.1 Westland Wessex HAS.1, c/n WA070, f/f:?; del Royal Navy+ 22jul79 coded 652-PO HAS.1 737 Sq/770-PO by Aug 1962, 737 Sq/520-PO by Jan 1+ 737 Sq Antrim Flt/406-AN Aug 1970 still May 1971; 737 S+ 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/J-A by Aug 1962, 845Sq/J-B by Jun 1964, (A+ conv to HAS.3 by Sep 1967 complete by Jul 1969. 814Sq/+ HAS.3 led insertion of Special Forces as 737 Sq/406-AN+ as 737 Sq/406-AN, attacked and damaged ARA Santa Fe out+ | |
| wa 83 | 1962 | XP150 : has.1 RN Wessex HAS.1 d/d 05oct62; conv HAS.3; to Moreton-in-+ 706Sq/506-CU by Mar 1964, 706Sq/576-CU by Dec 1965, to + 814Sq/273-V by Mar 1968, 814Sq/273-H by 1969, 737 Sq Ke+ 25aug78 pictured as 737 NAS /406-AN with Fishery Protec+ 22jul79 coded 606-AN with HMS Antrim 737Sq HQ Flt uncoded by Mar 1982 until Dec 1982, 737 Sq+ XP150 Fire Service College : G.I. National Fire College Moreton-in-Marsh by Apr 1993+ |
| wa 86 | 1962 | XP153 : has.1 Westland Wessex HAS.1, c/n WA086, f/f:?; del Royal Navy+ 706Sq/502-CU by Sep 1963, to Yeovil c May 1967 for HAS.+ 826Sq/143-E 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 / 902-HA, recoded /472-HA by Jan 19+ 826Sq/144-E by Dec 1968, 737 Sq/663-PO by Jul 1976 stil+ noted 22jul79 at HMS Osprey RNAS Portland coded 663-PO + 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 292-E Conversion to HAS.3, completed Dec 1966 HAS.3 700H Sq/583-CU by May 1967; 814 NAS /273-V by O+ Aug 1973 to Fleetlands Jul 1974 to Wroughton store 737 NAS / 665-PO by Feb 1976. On 3 May 1976, undercarr+ 22jul79 coded 655-PO Nov 1982 to AES Lee-on-Solent, 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/295-E by Nov 1964, ditch+ UK for repair and became 3rd conversion to HAS.3, 700H + |
| wa101 | 1963 | XS122 : has.1 820Sq/290-E by Jul 1965, 820Sq/060-E by 1966, to Yeovil+ 819 Sq/532 by Jun 1968, 737 Sq/435-PO by Mar 1972, 737S+ RNEC Manadon by May 1980 until at least 1993. Noted within grounds of HMS Sultan, Gosport 28may99 cod+ To A2707 Lee-on-Solent 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/294-E by Nov 1964, 815Sq/056 by Aug 1966, to Yeov+ 826Sq/142-E 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/O-B by Mar 1965, 819 Sq/530 by Jan 1966 sti+ Conv to HAS.3 829Sq Fife Flt/403-FF by May 1969, 737Sq + 24jul93 pictured preserved at International Helicopter + |
| 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/581-CU by Mar 1967, 814Sq/272-V 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 pre-production, 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 pre-production, WA240, f/f 1965; + AES Lee (A2615) by Mar 1978 RN noted 21jul79 at HMS Daedalus RNAS Lee-on-Solent wit+ |
| wa241 | 1965 | XT257 : Westland Wessex HAS.3 pre-production, 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 650-PO 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 |