Here is some links of rotary engine communities. Theses are places typically with a large forum, user base, and loads of information about the rotary engine.

Web Link Hits      No Pistons Community This is another community of rotary engine enthusiasts, although not as large as RX7Club.com, there is still a large amount of people in this community. 376      RX-8 Club Large online community of Mazda RX-8 owners. 195      RX-7 Club The largest Mazda RX-7 community on the web. 354      Australian Rotary Community Huge Australian rotary engine enthusiast community. 273

Online Communities   (4) Rotary Cars   (2) Clubs   (2) Vendors   (1) Rotary Engine   (4)