It’s always great to see Steam Traction World engines both on the rally fields and photos/videos of them steaming (and gleaming) – but we love to see them in mid-build too.
Your Builds: Thunderbolt
![Your Builds: Thunderbolt four inch steam engine](https://www.steamtractionworld.com/wp-content/uploads/2021/08/four-inch-steam-engine-750x350.jpg)
It’s always great to see Steam Traction World engines both on the rally fields and photos/videos of them steaming (and gleaming) – but we love to see them in mid-build too.