PropellerSafety.com

Archive for Kiekhaefer

Log Strike Testing Part 1: Log Strikes and Log Strike Systems

As outboard motors began to increase in horsepower, speeds went up, and striking submerged objects became more dangerous. Manufacturers designed systems to handle the loads created from striking logs or other submerged objects, and ways to test those systems. We (PGIC) cover log strike testing because the industry often uses log strike tests to evaluate […]

Log Strike Testing – 1950’s Mercury Video

Log strike tests have long been used by Mercury to prove their outboards and stern drives could survive the impact of striking submerged logs and other floating or submerged obstacles. In the original log strike tests, Mercury’s test crew used concrete weights to position telephone poles horizontally in open water, then ran boats over them. […]