M4A3E2 Sherman Jumbo

Medium Tank M4A3E2
M4A3E2 Sherman Jumbo M4A3E2 Sherman Jumbo
Originální název:
Original Name:
M4A3E2 Sherman Jumbo
střední tank medium tank
DD.06.1944-DD.07.1944 Fisher Tank Arsenal, Grand Blanc
Období výroby:
Production Period:
Vyrobeno kusů:
Number of Produced:
Prototyp vyroben:
Prototype Built:
Technické údaje:
Technical Data:
Bojová hmotnost:
Combat Weight:
38102 kg 84000 lb
Délka s kanónem dopředu:
Length with Gun Forward:
6274 mm 20 ft 7 in
Délka korby:
Hull Length:
6274 mm 20 ft 7 in
Celková šířka:
Overall Width:
2936 mm 9 ft 7 ⅝ in
Celková výška:
Overall Height:
2954 mm 9 ft 8 ¼ in
Světlá výška:
Ground Clearance:
432 mm 1 ft 5 in
Šířka pásu:
Track Width:
421 mm 1 ft 4 ⅝ in
Měrný tlak:
Ground Pressure:
0.1 MPa 14.2 psi
Korba :

přední 102mm / 47°
boky 76mm / 0°
zadní 38mm / 10-22°
horní 19mm / 83-90°
dno vpředu 25mm / 90°
dno vzadu 13mm / 90°

Věž :
štít kanonu 178mm / 0°
přední 152mm / 40-45°
boky 152mm / 0-13°
zadní 152mm / 0°
zezhora 25mm / 90°
Hull :

Front 4in / 47°
Sides 3in / 0°
Rear 1.5in / 10-22°
Top 0.75in / 83-90°
Floor front 1in / 90°
Floor rear 0.5in / 90°

Turret :
Gun mantle 7in / 0°
Front 6in / 12°
Side 6in / 6°
Rear 6in / 2°
Top 1in / 90°
Ford GAA Ford GAA
335.6 kW při 2600 ot/min 450 bhp at 2600 rpm
Převodové ústrojí:
synchronizovaná převodovka
počet rychlostí: 5+1
synchromesh gearbox
number of gears: 5+1
Rychlost na silnici:
Road Speed:
35.4 km/h 22 mph
Rychlost v terénu:
Cross-country Speed:
? km/h ? mph
Jízdní dosah po silnici:
Cruising Range on Road:
160.9 km 100 mi
Jízdní dosah v terénu:
Cross-country Cruising Range:
? km ? mi
Překonávání překážek:
Obstacles Crossing:
27 ° 60 %
Boční náklon:
Side Slope:
? ° ? %
Trench Crossing:
2.29 m 90in
Vertical Obstacle:
0.61 m 24in
Fording Depth:
0.91 m 36in
75mm kanon M3 ve věži T110, 104 nábojů 75mm gun M3 in T110 turret, 104 rounds
.50 protiletadlový kulomet M2HB (600 nábojů)
.30 spřažený kulomet M1919A4
.30 kulomet M1919A4 (oba celkem 6250 nábojů)
.50 anti-aircraft machine gun M2HB (600 rounds)
.30 coaxial machine gun M1919A4
.30 machine gun M1919A4 (both total of 6250 rounds)
Uživatelské státy:
User States:
Palivo : 80oktanový benzín, 168 US galonů

Otáčení věže : hydraulické a manuální, otočení o 360° za 15 vteřin
Fuel : 80octane gasoline, 168 US gallons

Turret traverse : hydraulic and manual, 360° turn in 15 seconds
Sherman, A history of the American Medium tank, R.P. Hunnicutt
URL : https://www.valka.cz/M4A3E2-Sherman-Jumbo-t469#15363 Version : 0
In the run-up to the invasion of Europe, the Allied experience of fighting in North Africa had shown the weakness of the inadequate armour of the American Sherman M4 medium tanks. After the development of the T-14 assault tank reached an impasse, it was decided to use a modified standard model of the M4A3 tank armed with the 75 mm M3 gun for the task. This tank was classified as the M4A3E2 and given the nickname "Jumbo". Between May 1944 and July 1944, 254 machines were so modified at Fisher Tank Arsenal.

The modification consisted, among other things, of adding 1.5 inches of armor to the front and to the tops of the hull sides. The result was the increase in frontal armor from 2.5 inches to 4 inches and side armor from 1.5 inches to 3 inches. The differential cover was replaced with a casting with 5.5 inch wall thickness which was 1.25 inches more than the original. The lights and siren were removed from the front of the hull. The transport barrel lock was slightly preĺve.
The turret was almost competently redesigned compared to the M4A3. It was quite similar to the turret of the T-23 development tank, which was used in later versions of the M4 armed with the 76 mm M1A1 - M1A2/C gun. On this turret
used the original ( from the T-23 turret) 3.5 inch M62 76 mm gun turret, supplemented by a 3.5 inch thick frontal armour block. This modified gun carried the designation T110. Most M4A3E2 machines were armed with the M3 75 mm gun, whose HE ammunition contained more explosive charge than the 76 mm HE ammunition and was therefore better suited as the primary armament of an assault tank. Gradually, the M4A3E2 also began to appear, also armed with the 76 mm M1A1 cannon. These were initially predominantly field conversions.

It was only in March 1945 that official rearmament to the 76 mm M1A1/A2 gun began. Rearmament from the 75 mm M3 to the 76 mm M1A1/A2 was relatively easy due to the T110 receiver design coming from the M62, as the firing pins were identical.
The turret itself was cast and its walls were up to 6 inches thick. The turret ceiling consisted of a welded 1 inch thick rolled steel plate on which was mounted the command cupola and oval entry hole for the loader.
The Ford GAA; 8 cylinder, 4 cycle, 60° vee gasoline propulsion unit remained unchanged. The gear ratios were slightly modified to compensate for the increased weight of the 84,000lbs (38,000kg) machine. This was reflected in the permanent mounting of the extensions on the T48's running tracks. The overall width of the running tracks was 20.1" (51.1cm). Pad pressure 14.2psi (0.997kg/cm2)

Combat deployment in Germany proved the M4A3E2's durability against even the heaviest anti-tank weapons. For example, at Fronhoven, one of the M4A3E2s belonging to the 743rd Tank Battalion was hit eight times by an 88 mm calibre projectile after being disabled by an anti-tank mine. Only one penetrated, just above the side plane above the tracks. The others bounced off the armour. (Concord 7046 US Tank Battles in Germany 1944-45 page 8)
All M4A3E2s served exclusively on the Western Front from June 1944 until the Armistice.

Sources :

US Tank Battles in Germany 1944-45
Publisher: Concord Publications (2002)

M4 (76mm) Sherman Medium Tank 1943-65
New Vanguard 73
Author: Steven J Zaloga
Illustrator: Jim Laurier
Paperback; April 2003; 48 pages; ISBN: 9781841765426

Tanks in Detail 6: Medium Tank M4 (76mm and 105mm) Sherman & Firefly
by Terry J Gander.
Published by Ian Allan Publishing.
Hersham, Surrey, KT12 5RG, England
Soft covers, 96 pages.
ISBN 0 7110 2989 X

M4A3E2 Sherman Jumbo - M4A3E2 vzybrojený 75 mm kanónom M3.

M4A3E2 vzybrojený 75 mm kanónom M3.
M4A3E2 Sherman Jumbo - M4A3E2 vzybrojený 76 mm kanónom M1A1.

M4A3E2 vzybrojený 76 mm kanónom M1A1.
URL : https://www.valka.cz/M4A3E2-Sherman-Jumbo-t469#300111 Version : 0
Beautiful shot from above of M4A3E2. Especially noteworthy are the command cupola, the massive front gun shield, and the side and front armour plating.
An identical photo is used in The Sherman at War: (2) The US Army in the European Theater 1943-45 page 43. The shot was taken at a field armament centre somewhere in France and is dated 4 November 1944. The machine shown is being prepared for handover to service after arrival from port.

M4A3E2 Sherman Jumbo - M4A3E2

URL : https://www.valka.cz/M4A3E2-Sherman-Jumbo-t469#320616 Version : 0
A trio of Shermans in the rubble of Cologne, from left to right: M4A1(76)W, M4A3(76)W and M4A3E2 "Jumbo" standing in the foreground. The latter tank served in the ranks of the 32nd Armoured Regiment of the 3rd Armoured Division.
M4A3E2 Sherman Jumbo - (Tank Museum)

(Tank Museum)
URL : https://www.valka.cz/M4A3E2-Sherman-Jumbo-t469#380810 Version : 0
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