What's wrong in this engine test cell picture from the book 'Ignition'?
I think there's a mix-up in the labeling of the photo.

Here's the photo and caption from a copy of "Ignition" that I just downloaded:



Here's the photo and caption from the next page:



Seen together, those two photos and captions make sense.

Somebody mixed up the images and the captions in the copy you are reading.