Re: How...?

I'd say now take the vehicle on a decent long journey and see if it makes it. ;-)

In my engineering days, I did a lot of work of tanks and armoured vehicles- not the mechanical side, electronics, navigation and related kit.

However, one of the tanks had as a selling point that the whole engine (and I think gear box). In one of the various meetings I attended, the engine swap was shown. It was a treat to behold. I think it was the M1A1.

the leopard had a removable engine box unit that dropped in quickly as a running package

could do what?

Headstands?

Jump cows?

How long did it take to change?

How long when under fire?

Sorry, the perils of not getting after editing- swapping the engine/gear box assembly.

I don't recall- I'm going back near on 30 years but I think it was under an hour.

They tend not to do that kind of thing in the battle zone!

However, it was done 'in the field', ie a makeshift work camp rather than a proper workshop. The whole 'drive unit' was just lifted out as a unit, having had the various connections disconnected etc. The engine was a modified version from some other application. Around that time I was involved with a number of armoured vehicles, including tanks. While I'm sure it was a tank, I'm not sure which one. I suspect the M1A1 as that was the tank I had most to do with. I spent some time in the US around then.

Here is a YouTube Video of the left part, although in a workshop: