Yeah, I knew that some of the smoke is burning rubber. Thats why there are black marks on the runway
But, when I went to an aviation museum there was a nose gear from some sort of airliner... The guide explained that it was not completely burning rubber but gas and that the tyres need to be re-inflated before TO. Just cant remember what the gas was. I'm guessing a hard landing would increase the pressure it the tyres a fair bit so possibly there is some release valve?
And why havn't Boeing put gear doors on the 737NG?, or is there... Even an optional extra
