Hey Harry, straightdown into the pavement does a pretty good job of destroying an engine. Actually the only engines I actually saw destroyed running were Control Line speed engines that threw the prop blades and flew to pieces (no throttle) from turning a bazillion RPM and car and boat engines that were run at full throttle with no load ie. upside down or onto the beach or a boat engine that lost cooling.

Usually the rod let go and that took lots of other things with them. Occasionally a C/L combat engine would throw a prop or break the rod but not all that often.