The Bristol Blenheim Mk.IV added a lengthened nose and stepped windscreen, to improve room for the bomb aimer. Initially, a full extension of the nose was made, however, this restricted the pilots view on landing, so the port side was scooped out, resulting in an asymmetrical layout. Improved armament consisted of a 0.303 in machine gun in the port wing, plus two 0.303 in machine-guns in a powered operated dorsal turret, and two remotely controlled rearward-firing 0.303 in machine guns mounted beneath the nose. Additional armour was added, as were more powerful Mercury engines.
Bristol Blenheim Mk.IV Prototype still with full noseBristol Blenheim Mk.IV Prototype still with curved windscreenBristol Blenheim Mk.IV Prototype with curved noseBristol Blenheim Mk.IV Prototype still with full nose
11 Squadron
Bristol Blenheim Mk.IV of 11 Squadron RAF, takes off from Racecourse airfield, Colombo, Ceylon.
13 Operational Training Unit
Bristol Blenheim Mk.IV of 13 OTUBristol Blenheim Mk.IV of 13 OTU circa 1943.Bristol Blenheim Mk.IV of 13 OTUBristol Blenheim Mk.IV V6083 of 13 OTUBristol Blenheim Mk.IV of 13 OTU
14 Squadron
Bristol Blenheim Mk.IVs (Z5893 ‘W’ nearest) of No. 14 Squadron RAF in flight over the Western DesertBristol Blenheim Mk.IV Z9710 of 14 sqn
40 Squadron
Bristol Blenheim Mk.IV of No. 40 Squadron at Wyton, July 1940.Bristol Blenheim Mk.IV of 40 Squadron RAF ready to receive a load of 250-lb GP bombs at Wyton, CambridgeshireBristol Blenheim Mk.IVs of No. 40 Squadron RAF prepare for take off at Wyton, CambridgeshireBristol Blenheim Mk.IVs of 40 Squadron RAF, lined upBristol Blenheim Mk.IVs of 40 Squadron RAF, running up their engines at Wyton, HuntingdonshireThe crew of a Bristol Blenheim Mk.IV of No. 40 Squadron exit their aircraft at Wyton, July 1940.Bristol Blenheim Mk.IV R3811 BL-G of No. 40 Squadron RAFBristol Blenheim Mk.IV R3612 BL-V of No. 40 Squadron RAF based at Wyton, Huntingdonshire
53 Squadron
Bristol Blenheim Mk.IV of No. 53 Squadron
82 Squadron
Bristol Blenheim Mk.IV UX-Z of 82 SquadronBristol Blenheim Mk.IV UX-M of 82 SquadronBristol Blenheim Mk.IV bombers of 82 Sqn lined up at Watton in May 1940Bristol Blenheim Mk.IV bombers of 82 Sqn lined up at Watton in May 1940
88 Squadron
Blenheim IV of No 88 (Hong Kong) Squadron at Attlebridge, Norfolk,16 August 1941
101 Squadron
Bristol Blenheim Mk.IVs of 101 Sqn circa August 1940.
105 Squadron
Bristol Blenheim Mk.IV V6014 GB-J of No. 105 Squadron RAF Detachment in a dispersal at Luqa, MaltaBristol Blenheim Mk.IV of 105 Squadron
107 Squadron
Bristol Blenheim Mk.IV R3816 OM-J of No. 107 Squadron RAF, on the ground at Leuchars, Fife
110 Squadron
Riggers inspect the exit-holes enemy bullets in the fuselage of Blenheim Mk.IV N6207 VE-G of 110 Sqn RAFBristol Blenheim Mk.IV of 110 Squadron RAFundergong maintenanceBristol Blenheim Mk.IV R3874, of 110 Squadron RAF at Wattisham, SuffolkBristol Blenheim Mk.IV R3600, of No. 110 Squadron RAFBristol Blenheim Mk.IV of No. 110 Squadron running up its engines at Wattisham, August 1940
113 Squadron
Bristol Blenheims of No. 113 Squadron RAF, based at Asansol, India, in flight during a bombing sortie over Burma. In the foreground is Blenheim Mark IV, Z7856
139 Squadron
An engine tent around the engine of a Bristol Blenheim Mk.IV of 139 Sqn at Betheniville to protect it from the weatherBristol Blenheim Mk.IVs of 139 Squadron RAF based at Plivot, flying eastwards over Northern FranceBristol Blenheim Mk.IV N6227 XD-M of No. 139 Squadron RAF, undergoes an engine overhaulBristol Blenheim Mark IV, L8760 XD-D of No. 139 Squadron RAF taxies to a halt at Betheniville after a sortie. Bristol Blenheim Mk.IV L8756 XD-E of No. 139 Squadron RAF, based at Plivot, France, in flight over northern France
226 Squadron
Bristol Blenheim Mk.IV of 226 Squadron RAF over England.
248 Squadron
Bristol Blenheim Mk.IV WR-B of No. 248 Sqn RAF based at North Coates, Lincolnshire, in flight over the North Sea
Detail
Bristol Blenheim Mk.IV CockpitBristol Blenheim Mk.IV dorsal turretThe reflecting mirror of a Type F.24 aerial camera adapted for low-level oblique photography
Bristol Blenheim Mk.IV Bombers of Unknown Squadrons
Bristol Blenheim Mk.IV N6155Bristol Blenheim Mk.IV is unpacked at Singapore, circa 1941Bristol Blenheim Mk.IV Far EastBristol Blenheim Mk.IV at a Maintenance Unit in EgyptBristol Blenheim Mk.IVBristol Blenheim Mk.IVBristol Blenheim Mk.IVBristol Blenheim Mk.IVBristol Blenheim Mk.IV L4839, L4851, L4864Bristol Blenheim Mk.IV L4859Bristol Blenheim Mk.IV Bristol Blenheim Mk.IVsBristol Blenheim Mk.IV
