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Britain
Bishop 25 pdr (Bishop)

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The Bishop 25 pdr was designed in 1941, manufactured by Birmingham Railway Carriage and Wagon Company based on the existing fully tracked Valentine II and was in use from 1942 to 1945.

Flag of World War 2 Britain
Photo of Bishop 25 pdr (Bishop)
Bishop 25 pdr(Bishop) scale illustration

General Details
Specifications
Operational Date(s)1942 - 1945
Quantity Produced149
Weight17.5 tonne
Crew4
M.G's small1
M.G's large(>10mm)n/a
Length5.57 mtr
Width2.66 mtr
Height2.80 mtr
Engine Details/Performance
Max Road Speed15 mph
Max Cross Country Speed8 mph
Range Road90 miles
Range Cross Country36 miles
Fuel TypeDiesel
Fuel Capacityunknown
Horse Power131 hp
Power/Weight7 hp/tonne
General Information
The Bishop 25 pdr was designed in 1941, manufactured by Birmingham Railway Carriage and Wagon Company based on the existing fully tracked Valentine II and was in use from 1942 to 1945.

The vehicle was powered by Associated Equipment Company(AEC) 'AEC A190' diesel powerplant producing 131 HP which could drive the vehicle on roads at up to 15 mph with a range of about 90 miles before refuelling. Its cross country performance was adequate providing a max speed of about 8 mph and a range of about 36 miles.

It was armed with 1 light machine gun , a Bren Gun. Its main armament consisted of an Ordnance Q.F. 25pdr Mk 2 which could penetrate 142 mm of flat plate at 100 metres

This was a Valentine II hull fitted with a fixed armoured box with large rear doors.

An Ordnance Q.F. 25pdr Mk 2 gun was mounted in the armoured box, but due to the shape of the box it could only fire to a maximum of about 6000 mtrs.

Armour Details
Turret
Front51mm@(51mm)
Side15mm@(15mm)
Rear15mm@(15mm)
Top10mm@90°(10mm)
Superstructure
Front30mm@68°(80mm)
Side60mm@(60mm)
Rear60mm@(60mm)
Top10mm@90°(10mm)
Hull
Front60mm@21°(64mm)
Side60mm@(60mm)
Rear60mm@(60mm)
Top10mm@90°(10mm)
Armour (x)mm @ (y)° (Effective mm @ 0°)
Effective Armour - Maximum 80 mm - Minimum 10 mm



Weapon Details
Flag
Bren Gun
(Machine Gun)
Blank
photo of Bren Gun from Bren gun photo from Wikipedia
History
The Bren gun was licenced from the Czechoslovak ZB vz.27 light machine gun which was designed and manufactured in Brno from 1935.

It fired the standard British .303 rifle round.
Manufactured1930 - 2004
Calibre7.70mm
LengthL/82
Rate of Fire500 rpm
 
Ammunition Details
Name/Id Calibre Weight MVelocity Explosive Content
Standard british .303 round - HPBT
(BALL Standard Small Arms)
7.70mm 0.01Kg 761M/Sec
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.17
Penetration(mm@30°) 1
Penetration(mm@0°) 2
Hit Probability(%) 98


 
Standard british .303 round
(BALL Standard Small Arms)
7.70mm 0.017Kg 783M/Sec
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.15
Penetration(mm@30°) 4
Penetration(mm@0°) 5
Hit Probability(%) 98


Weapon Details
Flag
Ordnance Q.F. 25pdr Mk 2
(Field Gun)
Blank
photo of Ordnance Q.F. 25pdr Mk 2 from 25pdr from Wikipedia
Manufactured1940 - 2018
Calibre87mm
LengthL/27
Rate of Fire8 rpm
Number of Rounds 32
 
 
Ammunition Details
Name/Id Calibre Weight MVelocity Explosive Content
25pdr AP
(AP Armor Piercing)
87mm 11.3Kg 518M/Sec
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.2 0.4 0.81 1.7 2.69 3.79 5.01 6.4
Penetration(mm@30°) 122 115 106 95 84 75 65 57
Penetration(mm@0°) 142 133 123 110 98 87 76 66
Hit Probability(%) 98 98 98 81 41 22 6 3


 
25pdr Supercharge
(AP Armor Piercing)
87mm 11.3Kg 564M/Sec
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.18 0.36 0.74 1.56 2.47 3.48 4.6 5.88
Penetration(mm@30°) 133 125 116 103 92 81 71 62
Penetration(mm@0°) 154 145 134 120 107 94 83 72
Hit Probability(%) 98 98 98 85 48 25 8 3



25pdr HE
(HE High Explosive)
87mm 11.5Kg 532M/Sec 0.793Kg explosive
Maximum Range 8000 Mtr
Range(Mtr)10002000300040005000600070008000
Flight Time(Secs) 2.12 4.87 8.58 13.84 21.9 35.81 65.5 173.58
Direct Fire
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.19 0.38 0.79 1.65 2.61 3.68 4.87 6.21
Hit Probability(%) 98 98 98 81 41 22 8 3
Blast/Fragmentation Effects
Burst radius Infantry in open 99% kill2 mtr Burst radius Infantry in open 66% kill5 mtr
Burst radius Infantry in open 33% kill13 mtr  Armour Penetration inc roof at 1 mtr2 mm
An explosion within 2 mtr of infantry in the open will cause 99% casualties - lethal.
An explosion within 5 mtr of infantry in the open will cause > 66% casualties and could damage some AFV's.
An explosion within 13 mtr of infantry in the open will cause 33% casualties.
The blast effect of this shell exploding within 1 mtr of an armoured vehicle will penetrate 2 mm of the tank armour including the roof.

Hit probability is based on a static 2 x 2.4 metre panel at 0 degrees(vertical) at the range specified.

The data that has been used to create these records has come from Wikipedia, The Lone Sentry, The Bundes Archive and numerous books and websites that have provided the detailed information that has not been available anywhere else. The information we use to calculate the penetration tables, flight times and the hit probability comes from the Gun Calibre, the Shell Mass(Kg) and the muzzle velocity, plus range reductions to allow for gravity and wind resistance. This calculation originally came from a pre-war Krupp calculation which has been modified, and seems to fit the actual test results.

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