Hello, all.

When I run-up to 2000 rpm and check my ignitions for independent operation, I get about 150 rpm drop when operating the mag, and about 50 or so when running the electronic alone. But when I switch from the Lightspeed back to both, I get a pronounced stutter with accompanying airframe shudder (torque). It may be a backfire, but I can’t hear it. It’s very consistent, (every time, exactly the same), but this is my first operation with electronic ignition in a Lycoming engine, so I’m not sure what’s up.

Thoughts?

14 hours ago, TDubs74 said:

What is your stance on the the West 105/209 Marc?  Strong enough or not recommended?  

Any of the approved epoxies are by definition "strong enough" and "recommended". I do not know anyone who USED the 105/209 combination to build a plane, but it is an approved combination. Personally, I'd use the MGS or Pro-Set (and have used them both on projects), with the EZ10-87 for anything that touches fuel. But they all work.

Marc: Thank you for giving the correct information.   105 resin with 209 hardener.   

I have Aeropoxy on hand and it works very well so I will continue using it.   At least everyone should now be using structural material.

I'll be driving in.

5 hours ago, Marc Zeitlin said:

This is an incorrect interpretation of reality. "WEST Systems" is a brand name. The 105 is the resin, and 205 / 206 / 207 / 209 are the hardeners. Only the 209 hardener, in concert with the 105 resin, is approved for structural layups - the 205/206 hardeners are great for micro/finishing.

What is your stance on the the West 105/209 Marc?  Strong enough or not recommended?