I thought the intermittent splashing of the cooling water/steam in the close-up portion of this J2-X engine test video looked interesting.
So, I used mplayer to dump frames from the video (30 fps) to jpg files (about 1800 images), and the Python Image Library to crop to a rectangle focused on the splashes.
a text file if you want to play with the data.
recurrence plots for Lorenz63 trajectories). I'm pretty sure this is not significant to engine development in any way, but I thought it was a neat source of time series data.