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Britain
Sherman 17 pdr gun (Firefly VC)
Ordnance classification - M4
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| The Sherman 17 pdr gun was designed in 1943, manufactured by American Locomotive Company and Others based on the existing fully tracked M4 and was in use from 1944 to 1945. |
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| | Specifications | | Operational Date(s) | 1944 - 1945 | | Ordnance classification | M4 | | Quantity Produced | 2150 | | Weight | 34.75 tonne | | Crew | 5 | | M.G's small | 1 | | M.G's large(>10mm) | 1 | | Length | 6.25 mtr | | Width | 2.71 mtr | | Height | 3.00 mtr | | Engine Details/Performance | | Max Road Speed | 24 mph | | Max Cross Country Speed | 13 mph | | Range Road | 101 miles | | Range Cross Country | 40 miles | | Fuel Type | Petrol | | Fuel Capacity | 160 gal | | Horse Power | 430 hp | | Power/Weight | 12 hp/tonne | | | General Information | The Sherman 17 pdr gun was designed in 1943, manufactured by American Locomotive Company and Others based on the existing fully tracked M4 and was in use from 1944 to 1945.
The vehicle was powered by Continental 'Radial' petrol powerplant producing 430 HP which could drive the vehicle on roads at up to 24 mph with a range of about 101 miles before refuelling. Its cross country performance was good providing a max speed of about 13 mph and a range of about 40 miles.
It was armed with 1 light machine gun , a 0.3 inch Browning Machine Gun M1919A4. and 1 large machine gun. Its main armament consisted of an Ordnance Q.F. 17pdr which could penetrate 201 mm of flat plate at 100 metres .
The Sherman II M4A1 Firefly was a similar shape to the M4 but had a curved cast hull which provided less flat surfaces for AT hits, this was mostly noticable at the top of the hull next to the turret.
The cast turret was modified to take the British 17pdr and a box added to the rear of the turret due to the length of the 17pdr. | |
| | Turret | | Front | | 65mm | @ | 0° | (65mm) | | Side | | 65mm | @ | 0° | (65mm) | | Rear | | 65mm | @ | 0° | (65mm) | | Top | | 25mm | @ | 90° | (25mm) |
| | Superstructure | | Front | | 51mm | @ | 45° | (72mm) | | Side | | 38mm | @ | 0° | (38mm) | | Rear | | 38mm | @ | 0° | (38mm) | | Top | | 19mm | @ | 90° | (19mm) |
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| Hull | | Front | | 40mm | @ | 45° | (57mm) | | Side | | 40mm | @ | 0° | (40mm) | | Rear | | 38mm | @ | 0° | (38mm) | | Top | | 14mm | @ | 90° | (14mm) |
| | Armour (x)mm @ (y)° (Effective mm @ 0°) | | Effective Armour - Maximum 72 mm - Minimum 14 mm |
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| Weapon Details |
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0.3 inch Browning Machine Gun M1919A4
(Machine Gun) x 2 |
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| | Manufacturer | Browning |
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| | Manufactured | 1919 - 1945 |
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| | Calibre | 7.60mm |
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| | Length | L/80 |
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| | Rate of Fire | 480 rpm |
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| | Number of Rounds | 6000
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| Ammunition Details |
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| Name/Id |
Calibre Weight MVelocity |
Explosive Content |
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.30-06 Springfield
(BALL Standard Small Arms)
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7.62mm 0.012Kg 820M/Sec | |
| Range(Mtr) | 100 | 200 | 400 | 800 | 1200 | 1600 | 2000 | 2400 |
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| Flight Time(Secs) |
0.15 |
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| Penetration(mm@30°) |
2 |
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| Penetration(mm@0°) |
3 |
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| Hit Probability(%) |
98 |
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| Weapon Details |
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Ordnance Q.F. 17pdr
(Anti Tank Gun) |
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| | Manufactured | 1942 - unknown |
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| | Calibre | 76.20mm |
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| | Length | L/55 |
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| Ammunition Details |
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| Name/Id |
Calibre Weight MVelocity |
Explosive Content |
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17pdr MkI - MkIII
(AP Armor Piercing)
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76.20mm 7.65Kg 950M/Sec | |
| Quoted Penetration 130mm@915m |
| Range(Mtr) | 100 | 200 | 400 | 800 | 1200 | 1600 | 2000 | 2400 |
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| Flight Time(Secs) |
0.11 |
0.22 |
0.44 |
0.94 |
1.5 |
2.13 |
2.85 |
3.69 |
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| Penetration(mm@30°) |
174 |
161 |
147 |
129 |
113 |
97 |
84 |
71 |
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| Penetration(mm@0°) |
201 |
186 |
170 |
150 |
131 |
113 |
97 |
82 |
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| Hit Probability(%) |
98 |
98 |
98 |
98 |
88 |
60 |
34 |
22 |
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17pdr HE/Red
(HE High Explosive)
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76.20mm 6.1Kg 550M/Sec | 0.480Kg explosive |
| Maximum Range not shown as gun elevation is limited |
| Range(Mtr) | 100 | 200 | 400 | 800 | 1200 | 1600 | 2000 | 2400 |
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| Flight Time(Secs) |
0.18 |
0.37 |
0.77 |
1.63 |
2.59 |
3.68 |
4.93 |
6.37 |
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| Direct Fire |
| Range(Mtr) | 100 | 200 | 400 | 800 | 1200 | 1600 | 2000 | 2400 |
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| Flight Time(Secs) |
0.18 |
0.37 |
0.77 |
1.63 |
2.59 |
3.68 |
4.93 |
6.37 |
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| Hit Probability(%) |
98 |
98 |
98 |
81 |
44 |
22 |
8 |
3 |
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| Blast/Fragmentation Effects |
| Burst radius Infantry in open 99% kill | 2 mtr |
Burst radius Infantry in open 66% kill | 5 mtr |
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| Burst radius Infantry in open 33% kill | 13 mtr |
Armour Penetration inc roof at 1 mtr | 1 mm |
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| 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. |
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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.
© WWIITanks 1980-2024
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