June 2000 Issue

Rockin’ Rollers

ECI and U.S. Airparts make another run at roller rocker arms for Lyc and TCM engines. They look promising to us.

[IMGCAP(1)] When it comes to general aviation, I complain about products and services as much as the next guy. My pet peeve is the slow pace at which cutting-edge engine technology trickles into aircraft powerplants.

True, electronic ignition is making inroads but you still can’t buy one and the valve train in your typical Lycoming—arguably the most wear-sensitive components of the engine—is little better than what you’d find in the 1927 Massey Ferguson tractor your granddad left rusting behind the barn. Current aircraft engines are typically equipped with crude rocker arms with simple “shelf” or brass bearing insert material and a hardened rocker arm tip which directly contacts the val...

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