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The M3 Grant was a Medium Tank designed in 1940, it was based on the fully tracked Medium Tank chassis and was in use from 1941 to 1942. It was commonly called a Grant. |
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| General Details (Medium Tank) |
|---|
| | Specifications | | Operational Date(s) | 1941 - 1942 | | Quantity Produced | 0 | | Weight | 27 tonne | | Crew | 6 | | M.G's small | 3 | | M.G's large(>10mm) | n/a | | Length | 5.69 mtr | | Width | 2.74 mtr | | Height | 3.15 mtr | | Engine Details/Performance | | Max Road Speed | 21 mph | | Max Cross Country Speed | 11 mph | | Range Road | 120 miles | | Range Cross Country | 48 miles | | Fuel Type | Petrol | | Fuel Capacity | 175 gal | | Horse Power | 340 hp | | Power/Weight | 12 hp/tonne | | | General Information | The M3 Grant was a Medium Tank designed in 1940, it was based on the fully tracked Medium Tank chassis and was in use from 1941 to 1942. It was commonly called a Grant.
The vehicle was powered by Wright 'Continental R975 EC2' petrol powerplant producing 340 HP which could drive the vehicle on roads at up to 21 mph with a range of about 120 miles before refuelling. Its cross country performance was good providing a max speed of about 11 mph and a range of about 48 miles.
It was armed with 3 light machine guns. Its main armament consisted of an Ordnance Q.F. 75mm weighing 6.760 kg and with a maximum range of 5,000 metres.
The Medium tank M3 Grant was was an American M3 Lee tank modified by replacing the original turret by a lower profile one with a large overhang at the rear to take radios, the Grant was the British version. | |
| | Turret | | Front | | 51mm | @ | 47° | (75mm) | | Side | | 51mm | @ | 5° | (51mm) | | Rear | | 51mm | @ | 5° | (51mm) | | Top | | 22mm | @ | 90° | (22mm) |
| | Superstructure | | Front | | 51mm | @ | 45° | (72mm) | | Side | | 38mm | @ | 0° | (38mm) | | Rear | | 38mm | @ | 0° | (38mm) | | Top | | 13mm | @ | 87° | (13mm) |
| | Hull | | Front | | 45mm | @ | 45° | (64mm) | | Side | | 38mm | @ | 0° | (38mm) | | Rear | | 38mm | @ | 0° | (38mm) | | Top | | 13mm | @ | 87° | (13mm) |
| | Armour (x)mm @ (y)° (Effective mm @ 0°) | | Effective Armour - Maximum 75 mm - Minimum 13 mm |
| | Weapon Details |
|---|
|
Ordnance Q.F. 75mm
(Tank Gun) |
 |
|
| Ammunition Details |
|---|
| Name/Id |
Calibre Weight MVelocity |
Explosive Content |
|
AP M72 U.S.
(AP Armor Piercing)
|
75mm 6.58Kg 618M/Sec | |
| Range(Mtr) | 100 | 200 | 400 | 800 | 1200 | 1600 | 2000 | 2400 |
|---|
| Flight Time(Secs) |
0.16 |
0.33 |
0.68 |
1.43 |
2.24 |
3.12 |
4.06 |
5.05 |
|---|
| Penetration(mm@30°) |
88 |
85 |
79 |
68 |
58 |
50 |
43 |
37 |
|---|
| Penetration(mm@0°) |
102 |
99 |
92 |
79 |
68 |
59 |
51 |
44 |
|---|
| Hit Probability(%) |
93 |
93 |
90 |
77 |
52 |
23 |
8 |
3 |
|---|
|
HE M48
(HE High Explosive)
|
75mm 6.76Kg 625M/Sec | 0.680Kg explosive |
| Maximum Range not shown as gun elevation is limited |
| Range(Mtr) | 100 | 200 | 400 | 800 | 1200 | 1600 | 2000 | 2400 |
|---|
| Flight Time(Secs) |
0.16 |
0.33 |
0.67 |
1.38 |
2.15 |
2.97 |
3.83 |
4.74 |
|---|
| lateral dispersion means the side to side variation of the shell from the aiming point |
|---|
| 50%(CEP) of shells land within +/- (mtr) |
0.12 |
0.12 |
0.12 |
0.21 |
0.32 |
0.43 |
0.53 |
0.64 |
|---|
| 80% of shells land within +/- (mtr) |
0.15 |
0.15 |
0.15 |
0.27 |
0.41 |
0.55 |
0.68 |
0.82 |
|---|
| 95% of shells land within +/- (mtr) |
0.24 |
0.24 |
0.24 |
0.41 |
0.63 |
0.84 |
1.04 |
1.25 |
|---|
| range dispersion means the back to front variation of the shell from the aiming point |
|---|
| 50%(CEP) of shells land within +/- (mtr) |
0.15 |
0.15 |
0.15 |
0.27 |
0.40 |
0.53 |
0.67 |
0.80 |
|---|
| 80% of shells land within +/- (mtr) |
0.19 |
0.19 |
0.19 |
0.35 |
0.51 |
0.68 |
0.86 |
1.02 |
|---|
| 95% of shells land within +/- (mtr) |
0.29 |
0.29 |
0.29 |
0.53 |
0.78 |
1.04 |
1.31 |
1.57 |
|---|
| Direct Fire |
| Range(Mtr) | 100 | 200 | 400 | 800 | 1200 | 1600 | 2000 | 2400 |
|---|
| Flight Time(Secs) |
0.16 |
0.33 |
0.67 |
1.42 |
2.22 |
3.1 |
4.03 |
|
|---|
| Hit Probability(%) |
93 |
93 |
90 |
77 |
52 |
23 |
8 |
|
|---|
| Blast/Fragmentation Effects |
| Burst radius Infantry in open 99% kill | 3 mtr |
Burst radius Infantry in open 66% kill | 6 mtr |
|---|
| Burst radius Infantry in open 33% kill | 16 mtr |
Armour Penetration inc roof at 1 mtr | 2 mm |
|---|
| An explosion within 3 mtr of infantry in the open will cause 99% casualties - lethal. |
| An explosion within 6 mtr of infantry in the open will cause > 66% casualties and could damage some AFV's. |
| An explosion within 16 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. |
| Weapon Details |
|---|
|
Ordnance Q.F. 37mm Mk 1
(Anti Aircraft) |
|
|
| Ammunition Details |
|---|
| Name/Id |
Calibre Weight MVelocity |
Explosive Content |
|
37 mm sk ptr m/34 slpprj m/38
(AP Armor Piercing)
|
37mm 0.74Kg 785M/Sec | |
| Quoted Penetration 40mm @ 400mtr/30° ( ? 46mm/0?) |
| Range(Mtr) | 100 | 200 | 400 | 800 | 1200 | 1600 | 2000 | 2400 |
|---|
| Flight Time(Secs) |
0.13 |
0.27 |
0.55 |
1.19 |
1.9 |
2.69 |
3.54 |
4.46 |
|---|
| Penetration(mm@30°) |
46 |
44 |
39 |
31 |
24 |
19 |
15 |
12 |
|---|
| Penetration(mm@0°) |
54 |
51 |
45 |
36 |
28 |
22 |
18 |
14 |
|---|
| Hit Probability(%) |
79 |
79 |
76 |
71 |
55 |
30 |
12 |
6 |
|---|
|
37 mm sk ptr m/34 sgr m/43
(HE High Explosive)
|
37mm 0.68Kg 805M/Sec | 0.210Kg explosive |
| Range(Mtr) | 1000 | 2000 | 3000 | 4000 | 5000 | 6000 | 7000 | 8000 |
|---|
| Flight Time(Secs) |
1.49 |
3.44 |
5.75 |
8.3 |
10.98 |
13.7 |
16.43 |
19.13 |
|---|
| lateral dispersion means the side to side variation of the shell from the aiming point |
|---|
| 50%(CEP) of shells land within +/- (mtr) |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
0.00 |
|---|
| 80% of shells land within +/- (mtr) |
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| 95% of shells land within +/- (mtr) |
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|---|
| range dispersion means the back to front variation of the shell from the aiming point |
|---|
| 50%(CEP) of shells land within +/- (mtr) |
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| 80% of shells land within +/- (mtr) |
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| 95% of shells land within +/- (mtr) |
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| Direct Fire |
| Range(Mtr) | 100 | 200 | 400 | 800 |
|---|
| Flight Time(Secs) |
0.13 |
0.26 |
0.55 |
1.21 |
|
|
|
|
|---|
| Hit Probability(%) |
79 |
79 |
76 |
71 |
|---|
| 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 | 0 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 not cause any significant armour damage. |
|
37 mm sk ptr m/34 slpgr m/39
(HEAT High Explosive Anti-Tank)
|
37mm 0.74Kg 775M/Sec | |
| Quoted Penetration 39mm @ 100mtr/30° ( ? 45mm/0?) |
| Range(Mtr) | 100 | 200 | 400 | 800 | 1200 | 1600 | 2000 | 2400 |
|---|
| Flight Time(Secs) |
0.13 |
0.27 |
0.56 |
1.2 |
1.93 |
2.73 |
3.6 |
|
|---|
| Penetration(mm@30°) |
39 |
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| Penetration(mm@0°) |
39 |
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| Hit Probability(%) |
79 |
79 |
76 |
71 |
55 |
30 |
12 |
|
|---|
About Penetration Figures
All penetration figures in this database are calculated to a common standard
based on German WWII testing criteria (complete penetration with functioning fuze).
This allows direct comparison between all nations' guns.
Original national test figures would be higher for some nations due to different criteria:
- German: 1.00? (baseline - strictest)
- British: 1.02? (slightly looser)
- American: 1.05? (50% mass through plate)
- Soviet: 1.10? (75% mass through plate)
For example, a Soviet gun showing 159mm here would be published as ~175mm in Soviet documents,
and a German gun showing 120mm would be published as 120mm in German documents.
The 159mm figure is directly comparable to the German 120mm - the Soviet gun really was more powerful.
|
| National Testing Standards |
|---|
| German: | 1.00? - Complete penetration, fuze functions (strictest) |
| British: | 1.02? - Complete penetration |
| American: | 1.05? - 50% of shell mass through plate |
| Soviet: | 1.10? - 75% of shell mass through plate |
|
All database figures are normalized to German standard for direct comparison.
Multiply by the factor above to see original national test figures.
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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 1980-2026
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