In Planes: Fire & Rescue, he is seen puffing along a train track as Dusty Crophopper flies past him.
- Unlike the steam locomotive seen in Planes, Muir's mouth is on the front of his smokebox door instead of his cowcatcher.
- These types of engines were used most common on American railroads during the 1800s and 1830s until 1928.
- Muir is likely based on a locomotive that worked on the Virginia & Truckee Railroad which was the Virginia and Truckee No. 13 Empire.
- There are a few shots in the movie where the animation on Muir's running gear is messed up, and his rods move incorrectly. Also, in one of these shots, his front set of drive wheels isn't turning while the other two are.
- His tender is lettered "Piston Peak Railway".