ORIGINAL: mmattockx
Yes, but those are all 45 sized cases, really just high powered 45 sized engines. They are not the same size at all as the OS, YS, Rossi, etc 60's. Much smaller and lighter. For a small, light ballistic ship, they would be perfect. but you would have serious balance issues on a bigger plane.
Mark
Only one of these was a 45 case. The rest are normal .60 cases. Weight about 18 ounces as they should. The engines you quoted above are way too heavy.