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Howitzer Motor Carriage M7 (Priest) (Priest)

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The Howitzer Motor Carriage M7 (Priest) based on the existing SP Gun and was in use from 1942.

General Details Specifications Operational Date(s) 1942 Ordnance classification Quantity Produced 2854 Weight unknown Crew 7 M.G's small 1 M.G's large(>10mm) n/a Length 6.08 mtr Width 2.92 mtr Height 2.97 mtr Engine Details/Performance Max Road Speed 25 mph Max Cross Country Speed 15 mph Range Road 125 miles Range Cross Country unknown Fuel Type Petrol Fuel Capacity 175 gal Horse Power 375 hp Power/Weight unknown General Information The Howitzer Motor Carriage M7 (Priest) based on the existing SP Gun and was in use from 1942. It was armed with 1 light machine gun. Its main armament consisted of a 105mm Howitzer M3A1 L/18 which could penetrate 61 mm of flat plate at 200 metres Armour Details Turret Front n/a Side n/a Rear n/a Top n/a Superstructure Front 12mm @ 0° (12mm) Side 12mm @ 0° (12mm) Rear 12mm @ 0° (12mm) Top n/a Hull Front 50mm @ 45° (71mm) Side 38mm @ 0° (38mm) Rear 38mm @ 0° (38mm) Top 14mm @ 90° (14mm) Armour (x)mm @ (y)° (Effective mm @ 0°) Effective Armour - Maximum 71 mm - Minimum 14 mm

Weapon Details 105mm Howitzer M3A1 L/18 Manufactured 1942 - unknown Calibre 105mm Length L/18   Ammunition Details Name/Id Calibre Weight MVelocity Explosive Content AP (AP Armor Piercing) 105mm 14.9Kg 310M/Sec Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.33 0.66 1.34 2.79 4.37 6.09 7.97 10.04 Penetration(mm@30°) 56 52 48 43 38 33 29 25 Penetration(mm@0°) 65 61 56 50 44 39 34 29 Hit Probability(%) 98 98 90 39 15 3 2 0 M1 Shell (HE High Explosive) 105mm 19.08Kg 472M/Sec 2.180Kg explosive Maximum Range 11250 Mtr Range(Mtr) 500 1000 1500 2000 2500 3000 3500 4000 Flight Time(Secs) 1.11 2.34 3.71 5.23 6.95 8.9 11.12 13.69 Direct Fire Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.21 0.43 0.88 1.83 2.87 4 5.23 6.59 Hit Probability(%) 98 98 98 74 34 22 6 3 Blast/Fragmentation Effects Burst radius Infantry in open 99% kill 4 mtr Burst radius Infantry in open 66% kill 8 mtr Burst radius Infantry in open 33% kill 20 mtr  Armour Penetration inc roof at 1 mtr 6 mm An explosion within 4 mtr of infantry in the open will cause 99% casualties - lethal. An explosion within 8 mtr of infantry in the open will cause > 66% casualties and could damage some AFV's. An explosion within 20 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 6 mm of the tank armour including the roof. HC BE M84 Shell (Smoke) 105mm 19.02Kg 0M/Sec Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) Penetration(mm@30°) 0 Penetration(mm@0°) Hit Probability(%)

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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