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Britain
Gun Self-Propelled 17pdr (Archer)

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The Gun Self-Propelled 17pdr was designed in 1942, manufactured by Vickers-Armstrong based on the existing fully tracked Valentine and was in use from 1943 to 1945.

Photo of Gun Self-Propelled 17pdr (Archer)

General Details
Specifications
Operational Date(s)1943 - 1945
Quantity Produced655
Weight15 tonne
Crew4
M.G's smalln/a
M.G's large(>10mm)n/a
Length6.77 mtr
Width2.66 mtr
Height2.26 mtr
Engine Details/Performance
Max Road Speed20 mph
Max Cross Country Speed8 mph
Range Road140 miles
Range Cross Country56 miles
Fuel TypeDiesel
Fuel Capacityunknown
Horse Power192 hp
Power/Weight12 hp/tonne
General Information
The Gun Self-Propelled 17pdr was designed in 1942, manufactured by Vickers-Armstrong based on the existing fully tracked Valentine and was in use from 1943 to 1945.

The vehicle was powered by GMC '6-71 6-cylinder diesel' diesel powerplant producing 192 HP which could drive the vehicle on roads at up to 20 mph with a range of about 140 miles before refuelling. Its cross country performance was good providing a max speed of about 8 mph and a range of about 56 miles.

Its main armament consisted of an Ordnance Q.F. 17pdr which could penetrate 170 mm of flat plate at 400 metres

The archer was a modified Valentine tank with a 17pdr gun in an open barbette facing towards the rear of the vehicle.

Armour Details
Turret
Front65mm@(65mm)
Side60mm@(60mm)
Rear60mm@(60mm)
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
Ordnance Q.F. 17pdr Blank
Manufactured1942 - unknown
Calibre76.20mm
LengthL/55
 
Ammunition Details
Name/Id Calibre Weight MVelocity Explosive Content
AP(AP)
76.20mm 7.65Kg 950M/Sec
Quoted Penetration 130mm@915m
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.11 0.22 0.44 0.94 1.5 2.13 2.85 3.69
Penetration(mm@30°) 174 161 147 129 113 97 84 71
Penetration(mm@0°) 201 186 170 150 131 113 97 82
Hit Probability(%) 98 98 98 98 88 60 34 22


 
APC(APC)
76.20mm 7.71Kg 883M/Sec
Quoted Penetration 130mm@915m
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.11 0.23 0.48 1.01 1.61 2.29 3.07 3.97
Penetration(mm@30°) 162 151 137 121 106 91 78 66
Penetration(mm@0°) 188 175 159 140 123 106 91 77
Hit Probability(%) 98 98 98 98 81 57 25 22



17pdr HE(HE)
76.20mm 6.1Kg 550M/Sec 0.480Kg explosive
Maximum Range 10000 Mtr
Range(Mtr)10002000300040005000600070008000
Flight Time(Secs) 2.09 4.93 9 15.32 26.45 51.33 156.99
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 mtr1 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 1 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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