Difference between Base width and Bell width - PatPL/Generic-Engines GitHub Wiki
(This was added in 0.4.2, will be avaiable in next stable release 0.5)
A picture says more than a thousand words. You should understand the difference by viewing the picture below.
- Every tank on the picture is 1m wide.
- Every engine's width is 1m.
- Engines above orange tanks use Bell width
- Engines below orange tanks use Base width