Open Rockers
I have been wondering if the early 4-stroke glow engines with open rockers have a problem with spitting fuel/oil from the lifters or valves? Are the rockers manually oiled before each flight? I would assume that their lifespan isn't too great. The reason I ask is that I have an old timer plane which I thought would be cool with exposed rockers since some of the actual fullsize vintage engines even had open rockers. Thxs. RS