Hi:

      I am of the impression that this engine would be a great replacement for a Fox .35 Stunt!  Run them fast on a low pitch prop and have fun! The only problem that may arise is the matter of replacement parts if needed.

                                                                         Good luck,

                                                                         Frank McCune

All  of the Royal engines are clones of OS engines. match the case up to the OS engine that matches it and you should have a chance at a repair.


Dennis