Through the generosity of one of our members (Thanks, Don!) I have a later model Fox 19. This is the one with a bolted on r/c carb. Did Fox offer a bolt on venturi for control line use?  Does anyone have one of these to part with? Thanks for any help with this!

They did make that, but I don't have either the engine or the venturi. The last time I saw one of these, someone had made a bolt-on flange with a hole for the OS-35S venturis. That was about 45 years ago, as I recall.

    Brett

Hello
Finding an original control line venturi would not be easy, I would just modify your RC carb with the wood dowel method and a cut-off wheel as I have posted previously posted. Virtually all Fox motors had a C/L version available and a venturi that could be brought separately too. Both my 19 BB on old combat wings were converted back in the 80's with Fox parts but CL versions do turn up now and again and are not expensive especially the pre BB version.
Regards Gerald