So I introduced my friend to war thunder and we took our Gladiators for a Realistic Battle :) He managed to crash on take off and we had a good laugh about it :D
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But then I flew by him while he was repairing and I got an option to help him, someting like "Press 'U' to help repair plane". I was curious about it and went for another pass and clicked the button.
I got a timer that flashed "repair time remaining: 00.49" and his repair timer vanished :PP
So now he couldn't repair. I landed and tried to knock him over but I passed right through(as per usual on airstrip). It ended up that I shot him and crashed so we could join another battle.

So my question here is: What was that repair thingy? What's it meant for? How do I use it? xD