The Bison was designed in 1940, manufactured by Concrete Limited based on the existing 4 x 2 drive commercial truck and was in use from 1940 to 1942.
General Details
Specifications
Operational Date(s)
1940 - 1942
Quantity Produced
150
Weight
unknown
Crew
8
M.G's small
1
M.G's large(>10mm)
n/a
Length
6.20 mtr
Width
2.80 mtr
Height
3.00 mtr
Engine Details/Performance
Max Road Speed
15 mph
Max Cross Country Speed
3 mph
Range Road
100 miles
Range Cross Country
20 miles
Fuel Type
Petrol
Fuel Capacity
unknown
Horse Power
75 hp
Power/Weight
unknown
General Information
The Bison was designed in 1940, manufactured by Concrete Limited based on the existing 4 x 2 drive commercial truck and was in use from 1940 to 1942.
The vehicle was powered by Bedford '3.5 L' petrol powerplant producing 75 HP which could drive the vehicle on roads at up to 15 mph with a range of about 100 miles before refuelling. Its cross country performance was poor providing a max speed of about 3 mph and a range of about 20 miles.
It was armed with 1 light machine gun , a Bren Gun. This was a standard heavy british truck with a 6 inch thick concrete structure built on top, various designs and truck bases were used so there were very few standard designs.
It was used as a mobile pill box for infantry to be protected from small arms fire, and was mostly used to defend airfields or by the home guard.
The walls were about 6 inches thick and made from High Alumina Concrete that made them impervious to small arms fire and armour liercing bullets.
Armour Details
Turret
Front
n/a
Side
n/a
Rear
n/a
Top
n/a
Superstructure
Front
n/a
Side
n/a
Rear
n/a
Top
n/a
Hull
Front
n/a
Side
n/a
Rear
n/a
Top
n/a
Armour (x)mm @ (y)° (Effective mm @ 0°)
Weapon Details
Bren Gun
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.
Manufactured
1930 - 2004
Calibre
7.70mm
Length
L/82
Rate of Fire
500 rpm
Number of Rounds
200
Ammunition Details
Name/Id
Calibre Weight MVelocity
Explosive Content
Standard british .303 round(AP)
7.70mm 0.017Kg 783M/Sec
Range(Mtr)
100
200
400
800
1200
1600
2000
2400
Flight Time(Secs)
0.15
Penetration(mm@30°)
4
Penetration(mm@0°)
5
Hit Probability(%)
98
Standard british .303 round - HPBT(MG)
7.70mm 0.01Kg 761M/Sec
Range(Mtr)
100
200
400
800
1200
1600
2000
2400
Flight Time(Secs)
0.17
Penetration(mm@30°)
1
Penetration(mm@0°)
2
Hit Probability(%)
98
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.