Todd Copeland
Pre-takeoff checklist
Hung my IO540 lycoming on my Glasair III today. Pretty excited about this engine. It was built by a very knowledgable builder who used to manage penn yan for three years before going into business for himself. It has gapless rings raising the compression. His suggestion as a preferred way to raise compression as it maintains the air volume for the combustion chamber. Also went with dual lightspeed ignition. Goal achieved. While we don't know the horsepower for sure he is estimating 340-350hp. On the test stand he could not go over 3/4 throttle without overspeed with his break in prop!