France AMR40

World War 2 Tank and Gun Database

The AMR40 was a Light Tank designed in 1939, manufactured by Renault, it was based on the fully tracked AMR35 chassis and was in use from 1940 to 1945. It was commonly called a AMX R-40.

General Details (Light Tank)

Specifications
Operational Date(s)	1940 - 1945
Quantity Produced	130
Weight	13.6 tonne
Crew	2
M.G's small	1
M.G's large(>10mm)	n/a
Length	3.88 mtr
Width	1.64 mtr
Height	1.90 mtr
Engine Details/Performance
Max Road Speed	34 mph
Max Cross Country Speed	19 mph
Range Road	124 miles
Range Cross Country	49 miles
Fuel Type	Petrol
Fuel Capacity	29 gal
Horse Power	190 hp
Power/Weight	13 hp/tonne

General Information

The AMR40 was a Light Tank designed in 1939, manufactured by Renault, it was based on the fully tracked AMR35 chassis and was in use from 1940 to 1945. It was commonly called a AMX R-40.

The vehicle was powered by Somua 'V8 190hp' petrol powerplant producing 190 HP which could drive the vehicle on roads at up to 34 mph with a range of about 124 miles before refuelling. Its cross country performance was good providing a max speed of about 19 mph and a range of about 49 miles.

It was armed with 1 light machine gun , a Mitrailleuse modèle 1931. Its main armament consisted of a 37 mm SA M1938 L/33 which could penetrate 32.8 mm of flat plate at 400 metres.

This was an uprated AMR35 using AMX suspension on an extended chassis providing better cross country performance. The armour was increased to 35mm on the front and 20mm to the sides.

Armour Details

Turret
Front	35mm	@	5°	(35mm)
Side	20mm	@	15°	(21mm)
Rear	10mm	@	15°	(10mm)
Top	9mm	@	90°	(9mm)

Superstructure
Front	35mm	@	20°	(37mm)
Side	20mm	@	0°	(20mm)
Rear	8mm	@	35°	(10mm)
Top	5mm	@	90°	(5mm)

Hull
Front	35mm	@	25°	(39mm)
Side	20mm	@	0°	(20mm)
Rear	8mm	@	35°	(10mm)
Top	6mm	@	90°	(6mm)

Armour (x)mm @ (y)° (Effective mm @ 0°)

Effective Armour - Maximum 39 mm - Minimum 6 mm


37 mm SA M1938 L/33
	Calibre	37mm
	Length	L/33
	Number of Rounds	90

Ammunition Details
Name/Id	Calibre Weight MVelocity					Explosive Content
AP (AP Armor Piercing)	37mm 0.56Kg 701M/Sec
Range(Mtr)	100	200	400	800	1200	1600	2000	2400
Flight Time(Secs)	0.15	0.3	0.62	1.35	2.18	3.09	4.09	5.15
Penetration(mm@30°)	34	32	28	21	16	12	9	7
Penetration(mm@0°)	40	37	33	25	19	15	11	9
Hit Probability(%)	79	79	76	66	44	20	6	3


Mitrailleuse modèle 1931 (Machine Gun)

	History
	Designed by Lt Colonel Reibel, the FM 24/29 was developed into a heavier machine gun capable of relatively sustained fire, by giving it an extremely thick and massive barrel, to act as a heat sink.
	Manufacturer	Reibel
	Manufactured	1932 - 1945
	Calibre	7.50mm
	Length	L/80
	Rate of Fire	450 rpm
	Number of Rounds	2400

Ammunition Details
Name/Id	Calibre Weight MVelocity					Explosive Content
7.5 MAS (AP Standard Small Arms)	7.50mm 0.009Kg 820M/Sec
Range(Mtr)	100	200	400	800	1200	1600	2000	2400
Flight Time(Secs)	0.12	0.24	0.49
Penetration(mm@30°)	6	5	4
Penetration(mm@0°)	8	6	5
Hit Probability(%)	74	74	74

Range(Mtr)	100	200	400	800	1200	1600	2000	2400
7.5 MAS (BALL Standard Small Arms)	7.50mm 0.009Kg 820M/Sec
Flight Time(Secs)	0.12
Penetration(mm@30°)	1
Penetration(mm@0°)	2
Hit Probability(%)	74

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.

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.