Picture of the day. (7 Viewers)

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A P-40 takes off from Amchitka, 1943. Note the PBY in the foreground. It looks to be carrying depth charges.

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M4A1 of 66th Armored Regt., 2nd Arm. Div.
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I wonder if that tank had been knocked out, then refurbished , and put back on duty ?
Notice the crudely welded on square plate on the left side, from the straight ahead view it looks like there might be one on the right side too.

I checked some images on google, it must have been a common mod to up the armor beside the driver, and gunner.
Some M4's have it some don't.
In most pictures that show it, the welding isn't so rough.
A lot of welders would call that bubble gum welding.
 
The M4A1 had a cast hull. Welding to cast iron is very difficult.
Actually the hull was cast steel, more weldable than cast iron.
It depends on the carbon content in the metal, but some cast iron considered not weldable.
I've welded cast iron, very difficult. Preheat, weld with the right rod, and slow cool down.
If it's a big part the preheat and cool down presents the biggest obstacle to overcome.
 

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