If 100 aircraft owners read this blog, I’m certain there will be 100 different opinions on the following subject. Based on my purpose, environment and mission, this is how I (eventually) came to the decision to use a traditional dual magneto ignition system for the Bearhawk 4 Place I am currently building.
From the time I started considering the Bearhawk 4 Place quick build kit, I was determined to install a dual electronic ignition system on the IO-540. I thought, why not? All modern cars use electronic ignition systems. Even the FAA has certified a few electronic ignition systems for certified built piston aircraft. At least partially, with a mag on the other side. So of course my engine should have EI. Yes, I want better engine starts. Yes, I want a smoother running (happier) engine. Yes, I want the improved fuel burn. After all, magnetos are ancient history! Come on people, get with the times!
So I set out to learn more about the Light Speed Engineering solid state EI system (lightspeed-aero.com). Klaus Savier, President, LSE, LLC, has done a phenomenal job designing and engineering his EI systems. With 20+ years in service and a great track record, along with Lycoming’s tacit approval of the Light Speed EI on their Thunderbolt engine line (by factory pre-drilling the flywheel for the crank sensor) made for a convincing argument to use this EI system on my IO-540.
Then, I took a harder look at both the P-Mag (Emagair.com) and SureFly (surefly.aero) magneto replacements. P-Mag offers a full featured electronic ignition upgrade with a built in power back-up (alternator). Simply swap out the existing traditional mag with the P-Mag. The SureFly magneto replacement is similar to the P-Mag, without back up power (uses ship power).
With this information, I’m now leaning towards P-Mag or SureFly EI’s over the Light Speed, mostly because of the ease of installation and all in one units. Unlike Light Speed that requires multiple satellite components; crank sensor, multiple coil packs, ignition modules with suggested mounting locations on the cabin side of the firewall and, recommended cooling fans. Oh, and don’t forget the additional 12V back-up battery (another 10+ pounds). P-Mag and SureFly require much less real estate, additional stuff and weigh less. I liked that.