I'm confident that it's a WorldModels Zen50. I owned one about 8yrs ago. I had a .70 4-stroke engine. Great flying plane, one of the few I wished I'd never sold...and I'm sure I gave the manual to the new owner.... but that's what it is. You might get some info from the distributing outlet in Livermore, Calif. or try
www.theworldmodels.com for some info(I don't know if thats an active link anymore)..but in any case... Google WorldModels Zen50, that will probably get some info too.
