Germany 7.5cm Pak 40/1 auf RSO (Sf) (Sf)

World War 2 Tank and Gun Database

The 7.5cm Pak 40/1 auf RSO (Sf), it was based on the Captured French chassis and was in use from 1944. It was commonly called a Sf.

General Details (SP Anti Tank)

Specifications
Operational Date(s)	1944
Ordnance classification
Quantity Produced	0
Weight	unknown
Crew	4
M.G's small	n/a
M.G's large(>10mm)	n/a
Length	4.23 mtr
Width	2.22 mtr
Height	2.00 mtr
Engine Details/Performance
Max Road Speed	12 mph
Max Cross Country Speed	10 mph
Range Road	0 miles
Range Cross Country	unknown
Fuel Type	Unknown
Fuel Capacity	unknown
Horse Power	0 hp
Power/Weight	unknown

General Information
The 7.5cm Pak 40/1 auf RSO (Sf), it was based on the Captured French chassis and was in use from 1944. It was commonly called a Sf. Its main armament consisted of a 7.5cm Pak 40 L/46 which could penetrate 145.2 mm of flat plate at 200 metres

Armour Details

Turret
Front	n/a
Side	n/a
Rear	n/a
Top	n/a

Superstructure
Front	n/a
Side	n/a
Rear	n/a
Top	n/a

Hull
Front	n/a
Side	n/a
Rear	n/a
Top	n/a

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


7.5cm Pak 40 L/46 7.5cm Panzerabwehrkanone 40 L/46 (translates as Anti Tank Gun)

	History
	This was an enlarged 5cm Pak 38 so looks very similar, but with improved performance especially against the Russian T34
	Manufacturer	Rheinmetal-Borsig
	Manufactured	1941 - 1945
	Calibre	75mm
	Length	L/46
	Rate of Fire	14 rpm
	Number of Rounds	15

Ammunition Details
Name/Id	Calibre Weight MVelocity					Explosive Content
7.5cm Pzgr 39 L/48 (AP Armor Piercing)	75mm 6.8Kg 792M/Sec
Quoted Penetration 96mm @ 500mtr/30° ( ? 110mm/0?)
Range(Mtr)	100	200	400	800	1200	1600	2000	2400
Flight Time(Secs)	0.13	0.26	0.53	1.09	1.7	2.34	3.03	3.75
Penetration(mm@30°)	129	125	118	105	94	83	74	66
Penetration(mm@0°)	149	145	137	122	109	97	86	77
Hit Probability(%)	93	93	90	83	64	52	23	14

Range(Mtr)	100	200	400	800	1200	1600	2000	2400
7.5cm Pzgr 40 (AP40 Armour Piercing Tungsten Cored)	75mm 4.1Kg 920M/Sec
Quoted Penetration 115mm @ 500mtr/30° ( ? 132mm/0?)
Flight Time(Secs)	0.11	0.22	0.45	0.93	1.44	1.98	2.55	3.15
Penetration(mm@30°)	145	142	135	122	111	100	91	82
Penetration(mm@0°)	169	164	156	142	128	116	105	95
Hit Probability(%)	93	93	93	87	77	64	35	23

Range(Mtr)	100	200	400	800	1200	1600	2000	2400
7.5cm Sprgr 34 (HE High Explosive)	75mm 5.8Kg 548M/Sec					0.640Kg explosive
Maximum Range not shown as gun elevation is limited
Flight Time(Secs)	0.18	0.37	0.76	1.58	2.45	3.38	4.37	5.41
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)	0.18	0.37	0.77	1.61	2.54	3.53	4.6
Hit Probability(%)	93	93	90	64	35	14	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	17 mtr	Armour Penetration inc roof at 1 mtr						1 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 17 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.

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.