RE: Engine For Kwik FLi Mk. III
No prob RG, castor is what these things were designed for. I find that, once run in, you can go for the Omega mix of syn and castor, but still at 20%. Modern oils work well with modern engines/clearances, but don't seem to allow the older ringed engines to scrub in properly, too lubricious and the ring/liner ends up glazed and the operator wondering why his low time engine has no compression. I am running a couple of oldies, a pumper 'Lee' K&B and an OS61FSR and with a little care with the fuel and needle settings, and lowish load prop selection, they should last a good time even in the pattern models they fly. Bearings are no problem, but rings and liners...
Evan, WB #12.