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Tank heights


Guest Mike

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Originally posted by michael kenny:

The Sherman should be compared to the tanks in use when it entered service.

In which case you should compare it's vulnerability and killing power with those tanks too.......
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The Sherman didn't have a German analogue, so there's no reason why it "should" be compared to one tank vs. another. Nothing unreasonable about comparing the Sherman to all of its contemporaries - the tanks it fought against. Just realize that all such comparisons are apples-to-oranges, so comparing a single statistic won't always mean much.

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Read that in N. Africa US tankers used the "high" turret to an advantage when engaging enemy guns by being able to peek over sand dunes w/o exposing as much of the hull to danger even if the enemy had higher ground. (I know that is called being "hull-down" but I guess in this situation a Sherman could get "more" hull-down than say a PZ III) Being tall and skinny can have its advantages. Besides the Sherman could suck in its gut and wriggle 'tween trees, too!

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Sounds like a bit of uninformed folklore. Height is actually a disadvantage in going hull down. A shorter tank can use a sand dune for hull down just as easily: it simply has to park a bit higher up the slope. Also, as has already been pointed out, the Sherman wasn't really all that tall.

There's some truth to the advantages of the Sherman being narrower than some of its rivals, but situations where that would really make a difference on the battlefield are rare. The Sherman was made narrow to make it easier to transport.

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Originally posted by bitchen frizzy:

Sounds like a bit of uninformed folklore. Height is actually a disadvantage in going hull down.

AIUI the main characteristic favouring good hull-down positions is main gun depression. In this respect the Sherman has a very slight advantage over the German mediums; 10 degrees against 8.

All the best,

John.

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The Panther and Jagdpanther had a good reason to be so high: the torsion bar suspension didn't allow the designers to sink a lot of junk into the suspension. That's a problem for the Jagdpanther in particular since normally the Jagdpanzers can be made very low by having the gun recoil into space between the suspension mechanism. With torsion bars everything has to stay above suspension level.

The problem with the Sherman is that it exposes such a huge amount of front turret armor. It is well-armored on the upper hull, but the turret front is just very hight. And as opposed to the German Panzers much of that height is full compartment, not detail like the copula.

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That's one of things I also couldn't understand about the Sherman design. Why did it have such a relatively well armoured lower hull compared with the upper hull & turret when surely the designers should have been placing more armour in the more commonly exposed areas. I'm assuming that it's taken as given that tankers usually try to reach hull down positions to reduce their exposure & therefore difficulty for the enemy to hit them.

Regards

Jim R.

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M4A1 (early) hull front 51mm, gun shield 76mm

M4A2 - upper hull 64mm, lower hull 108-51mm, gun shield 89mm

M4A3: hull front 51mm, Gun shield 89mm

M4A4: Hull front 51mm, gun shield 76mm

M4A6: - upper hull 64mm, lower hull 108-51mm, gun shield 89mm

M4A1(76)W: - upper hull 64mm, lower hull 108-51mm, gun shield 89mm

M4A3(75)W: - upper hull 64mm, lower hull 108-51mm, gun shield 89mm

M4A3(76)W: - upper hull 64mm, lower hull 108-51mm, gun shield 89mm

M4(105): - upper hull 64mm, lower hull 108-51mm, howitzer shield 91mm

M4A3E2 Jumbo: upper front hull 100mm, lower front 140-114mm, gun shield 178mm

Pretty much all the other marks have the upper hull 64mm, lower hull 108-51mm, gun shield 89mm pattern by the look.

so somewhere on the lower hull front of some marks the armour is heavier than the turret front, but the turret front is always more heavily armouored than the upper hull.

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Originally posted by Stalin's Organist:

so somewhere on the lower hull front of some marks the armour is heavier than the turret front, but the turret front is always more heavily armouored than the upper hull.

Not if you take into account the angle at which these plates are set at. A CMAK M4A1 has the upper hull set to 51mm at 56 degrees from vertical. This works out to roughly 3.56", or about 90mm, when measured along a horizontal plane.
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I deliberately wasn't taking angle into account - it's much easier to angle hull armour than turret armour, and many, many tanks have heavier hull armour when the angle is taken into account.

Turret front armour just has to be as heavy as it can be - there aren't many tricks you can do.

As for why is it 108mm on some part of the lower hull? I have no idea - I also have no idea jujst where that thickness is - anyone got a diagram showing it?

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