Hi guys,

I just received this engine.. bought it sight unseen, no box or paperwork. Can anyone estimate its manufacture year? I haven't seen many Perry equipped OPS engines but I understand they came as such from the factory. The engine was mounted once but never run.

I would also like to know the proper break-in fuel and prop...

Thanks for the help!

Art

It's an OPS Ursus (It means "Bear" I believe...)

I bought one a hundred years ago from Shamrock Competition Hobbies in New Orleans Louisiana.

http://sceptreflight.net/Model%20Eng...Ursus%2060.pdf