Started to appear in late 1942 and was based on the PzKpfw III Ausf J chassis.4
Early models had bolted on supplemental armor on the front, with later models having it welded.3 Later models had the driver's binocular vision device removed.3 Late models had the ventilator mounted on the rear wall of the superstructure, whereas the early models had it mounted in the roof.3
A new commander cupola with 8 periscopes was added. A folding shield for the machine gun was installed in front of the loader's hatch on the roof.3,4
The sides of the superstructure were slanted and slanted plates were installed to protect the panniers. Most had Schürzen installed to protect against hollow charged weapons.3,6 Some also had Zimmerit paint to help against magnetic mines.3,4
The 7.5 cm StuK 40 L/48 gun included a muzzle brake.5
The coaxial machine gun wasn't added until early 1944. In late spring 1944 a Nahverteidigungswaffe (close-in defense weapon) and a remote controlled machine gun in the roof was added.
Had commander's cupola3 with 7 episcopes.4 No box shaped projections on the sides of the superstructure.3 165 PzKpfw III Ausf M chassis were used for the StuG Ausf G and 173 PzKpfw III that were returned for overhaul during 1944 were converted as well.
Hitler wanted 220 built every month by June 1943.5 He then raised it to 300 per month in 1944.5 These goals were exceeded by the factories.5
Vehicles issued to Funklenk Kompanien (Remote Control Companies) had an additional radio aerial installed on the left front of the fighting compartment.
| StuG III Ausf G, StuG 40 Ausf G |
|
|---|---|
| Crew | 41,2,3,4,6 |
| Radio | FuG152 |
| OR | FuG162 |
| Physical Characteristics | |
| Weight | 53,020 lb6 23.52 tons1, 23.9 tons4, 24 tons5 23,900 kg1,3, 24,100 kg6 |
| Length | 20' 7"6, 22' 2.5"1 6.77 m1,2,3,6 |
| Height | 6' 7"6, 7' 1"1 2.16 m1,2,6 |
| Width | 9'6, 9' 8.1"1 2.95 m1,2,3,6 Ostkette: 3.33 m3 Schürzen: 3.41 m3 |
| Width over tracks | |
| Ground clearance | 0.39 m3 |
| Ground contact length | 2.86 m3 |
| Ground pressure | 1.04 (kg/cm2)3 |
| Armament (mm) | |
| Main | 1: 75 mm StuK 40 L/482,3,5,6 1: 75 mm1 |
| Secondary | |
| MG | 2: 7.92 mm MG1 2: 7.92 mm MG342 1: 7.92 mm MG345,6 1: MG 343 |
| OR | 7.92 mm MG422 |
| Side arms | |
| Quantity | |
| Main | 542,3 |
| Secondary | |
| MG | 6002,3 |
| Side arms | |
| Armor Thickness (mm) | 16 - 806, 501 Front: 505, 803 Side: 303,5 Rear: 205, 303 |
| Hull Front, Upper | 50+30 or 80@10°2 Mantlet: 50 or 50+30@0°2 50+303 |
| Hull Front, Lower | 50+30 or 80@21°2 |
| Hull Sides, Upper | 30@11°2 Mantlet: 30@17°2 |
| Hull Sides, Lower | 30@0°2 |
| Hull Rear | 30@0°2 & 50@10°2 |
| Hull Top | 11-17@75° to 90°2 Mantlet: 30@90°2 |
| Hull Bottom | 16@90°2 |
| Superstructure Front | |
| Superstructure Sides | |
| Superstructure Rear | |
| Superstructure Top | |
| Engine (Make / Model) | Maybach HL 120 TRM1,2,3,6 |
| Bore / stroke | |
| Cooling | |
| Cylinders | V-123 |
| Capacity | |
| Net HP | 300@3,000 rpm3 |
| Power to weight ratio | |
| Compression ratio | |
| Transmission (Type) | 6 forward, 1 reverse2,3 |
| Steering | |
| Steering ratio | |
| Starter | |
| Electrical system | |
| Ignition | |
| Fuel (Type) | |
| Octane | |
| Quantity | 310 liters3 |
| Road consumption | 100 km/184 liters |
| Cross country consumption | |
| Performance | |
| Traverse | 10° left, 10° right, hand.2 |
| Speed - Road | 25 mph6 40 kph2,3,6 |
| Speed - Cross Country | |
| Range - Road | 93.6 miles1, 97 miles6 155 km1,2,3,6 |
| Range - Cross Country | 95 km3 |
| Turning radius | 5.85 m3 |
| Elevation limits | -6° to +20°2, -5° to +20°5 |
| Fording depth | 2' 8"6 0.8 m3,6 |
| Trench crossing | 8' 6"6 2.3 m3, 2.59 m6 |
| Vertical obstacle | 2'6 0.6 m3,6 |
| Climbing ability | |
| Suspension (Type) | Torsion Bar3 |
| Wheels each side | |
| Return rollers each side | |
| Tracks (Type) | |
| Length | 93 links3 |
| Width | 0.4 m3 |
| Width of link | |
| Diameter | |
| Number of links | |
| Pitch | |
| Tire tread | |
| Track centers/tread | 2.51 m3 |
Sources: