really useful engines

So I had another birthday. I don’t feel a year older though, but I do feel a day older than yesterday. Tomorrow I might feel a day even older. Anyway, I went out on my bike to enjoy the sunny super-bowl Sunday weather, and was attracted (not acttracted per se, but you know what I mean) by the clunkety-clunking noise coming from the railroads down by 2nd street. I don’t know what these things are properly called (which considering my two-year old is an expert on such matters, and an avid Thomas fan), but there were loads of these yellow maintenance railtrucks out, busy at work, rolling slowly down the track, making a good old noise. Some were huge complicated loking engines, others small crane-type machines, like this one, picking up wooden sleepers and doing whatever it was supposed to be doing. I sketched it as it clunkety-clunked by.