Air tank inspection

A few readers were worried about the state of the air tanks on an old truck like this - that they may be badly rusted inside and unsafe. So i bought a cheap USB endoscope on fleabay 

I could then inspect the inside of the tanks. The image quality is not great and what makes the camera had to use is that there is a time lag of several seconds for the images displayed on the attached laptop.

It was good enough to see that the innards were not badly corroded - some surface rust and a fair amount of black gunge