Blenheim Mk.IF - The Cool Younger Brother

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Introduction:

Following existing Blenheim bomber suggestions, such as export variants and the Type 160 Blenheim V, this post focuses on the Bristol Blenheim Mk IF, the long-range heavy fighter variant of the Blenheim family. Unlike the Mk IV already in game, the Mk IF was converted specifically for fighter duties to supplement short range aircraft like the Hurricane. It saw widespread early war service with the RAF and played an important role during the opening phase of WWII. Because of its role, armament, and historical importance, I think it would be a very good addition to the British air tech tree.

A-Bristol-Blenheim-Mk-1F-of-No.-25-Squadron-being-refuelled-at-Northolt-April-1940


Vehicle History:

The Blenheim Mk IF was developed from the Blenheim Mk I light bomber, which entered RAF service in 1937. At the time, the RAF lacked a fighter with sufficient range and endurance for long patrols, escort missions, and operations over the North Sea and mainland Europe. As a result, around 200 Blenheim Mk I airframes were converted into the Mk IF heavy fighter configuration.

The primary modification was the addition of a ventral gun pack mounted beneath the fuselage. This pack contained four forward-firing .303 Browning machine guns, greatly increasing the aircraft’s offensive firepower. The Mk IF retained the fixed forward-firing .303 Browning machine gun mounted in the port wing, as fitted to standard Blenheim bombers.

Defensive armament was unchanged, with a dorsal turret mounting a rear-facing .303 machine gun for self defense. Some aircraft were briefly fitted with a small bomb rack behind the gun pack, capable of carrying eight 40 lb anti-personnel bombs, but this installation negatively affected handling and was soon abandoned.

Although heavier and less agile than single engine fighters, the Mk IF offered greater range and endurance. Later in its service life, some Mk IFs were equipped with early AI Mk III or Mk IV airborne interception radar, making them among the first British aircraft to operate as radar-equipped night fighters.


Operational History:

By 1939, at least seven RAF squadrons were operating the Blenheim Mk IF, and within a short time around sixty squadrons had some experience with the type. It quickly became clear that the aircraft was not suited to fighter-versus-fighter combat in daylight, as it was slower and less maneuverable than more common contemporary single engine fighters.

Despite this, the Mk IF proved useful as a long-range escort fighter, naval reconnaissance aircraft, and intruder type attacker. At the outbreak of war, it was the only reasonably well armed UK based fighter with the range needed for missions over mainland Europe. Blenheim Mk IF crews were among the first RAF units to see combat during the Battle of France in May 1940.

Losses in daylight operations were heavy, particularly against German fighters and anti-aircraft fire. As a result, the Mk IF was increasingly withdrawn from daytime combat and reassigned to night fighter duties, where it achieved some success until replaced by the more capable and modern Bristol Beaufighter.

BLENHEIM-F


Vehicle Specifications:

  • Crew: 3
  • Engines: 2 × Bristol Mercury radial engines
  • Armament:
    • 4 × .303 Browning machine guns in ventral gun pack
    • 1 × .303 Browning in port wing
    • Rear-facing dorsal turret-mounted .303 machine gun
  • No bomb load

Sources

+1! But we all know Gaijin hates British stuff and refuses to add WW2 atp :(

First of all I support this suggestion and would really like to see the expansion of the Blenheim/Bolingbroke family in War Thunder (as well as a long overdue updated model).

By December 1939, 20 squadrons were operating the Blenheim Mk.IF. A total of 26 squadrons used this variant operationally;

No. 23 Squadron RAF: December 1938 - April 1941
No. 25 Squadron RAF: December 1938 - January 1941
No. 27 Squadron RAF: November 1940 - February 1942
No. 29 Squadron RAF: December 1938 - February 1941
No. 30 Squadron RAF: June 1940 - March 1941
No. 64 Squadron RAF: December 1938 - April 1940
No. 68 Squadron RAF: January 1941 - May 1941
No. 92 (East India) Squadron RAF: October 1939 - March 1940
No. 141 Squadron RAF: November 1939 - May 1940
No. 145 Squadron RAF: October 1939 - May 1940
No. 203 Squadron RAF: March 1940 - May 1940
No. 219 Squadron RAF: October 1939 - February 1941
No. 222 (Natal) Squadron RAF: October 1939 - March 1940
No. 229 Squadron RAF: October 1939 - March 1940
No. 233 Squadron RAF: October 1939 - January 1940
No. 234 (Madras Presidency) Squadron RAF: November 1939 - March 1940
No. 235 Squadron RAF: February 1940 - May 1940
No. 236 Squadron RAF: November 1939 - July 1940
No. 242 (Canadian) Squadron RAF: December 1939 - December 1939
No. 245 (Northern Rhodesia) Squadron RAF: November 1939 - March 1940
No. 248 Squadron RAF: December 1939 - May 1940
No. 252 Squadron RAF: December 1940 - April 1941
No. 254 Squadron RAF: November 1939 - April 1940
No. 600 (City of London) Squadron AAF: January 1939 - October 1941
No. 601 (County of London) Squadron AAF: January 1939 - February 1940
No. 604 (County of Middlesex) Squadron AAF: January 1939 - May 1941

To add some more information;

Crew: 3 (Pilot, Observer and Wireless Operator/Rear Gunner)

Powerplant:
2 x Bristol Mercury VIII

Offensive Armament:
1 x .303 Browning Mk.II in port wing
4 x .303 Browning Mk.II in ventral pack
8 x 20lb or 8 x 40lb bombs on Light Series Carrier under rear fuselage

Defensive Armament:
1 x .303 Lewis in Bristol Type B.I Mk.I dorsal turret or 1 x .303 Vickers K in Bristol Type B.I Mk.IE dorsal turret

Sources

RAF Squadrons: A comprehensive record of the movement and equipment of all RAF squadrons and their antecedents since 1912 C. G. Jefford MBE (Airlife Publishing1993)
Bristol Blenheim: Warpaint Series No.26 A. Thomas (Warpaint Books)
Bristol Blenheim MkI & MkIF: Modeller’s Photographic Archive 1 A. Price and M. Postlethwaite (Red Kite 2018)
Bristol Blenheim 1935 to 1944 (all marks): Owners’ Workshop Manual J. Cotter (Haynes Publishing 2015)
British Aircraft Armament Volume 1: RAF gun turrets from 1914 to the present day R. W. Clarke (Haynes Publishing 1993)
Blenheim: Britain’s fastest bomber at the outbreak of world war 2 Multiple (Kelsey Publishing 2011)
No. 211 Squadron RAF: Blenheim armament (Blenheim armament)
Air of Authority - A History of RAF Organisation (Royal Air Force Organisational History)