When you join two halves of a flat aviation engine together, they often weep between the starter and the alternator. Not only is this unsightly, its wasteful and makes completing an overhaul more cumbersome than need be. Enter Ly-Con, whose groovy O-ring process promises to stop leaks before they start.
The aerodynamics of an airplane sometimes don't cooperate with the pilots desire to roll, and instead produce both yaw and roll. Contributing factors are aileron parasite drag, induced drag between the wings and changes in the roll rate itself;