Little did we know when we started back in 2005 that the radial motor was not really an airplane motor but actually one of the first motorcycle motors.
The rotating radial in this bike circa 1890 and possibly the first production motorcycle introduced features you now find on every motorcycle.
Durring World War II no other internal combustion engine made more of an impact from tanks to aircraft the radial coined to the term bulletproof.
2005 JRL introduces "Blue" Its line of radial motorcycles remains one of the most popular motorcycles to this day.
It would be a crime to use anything less. This article (back in 2007) gives a good look back: