After only ~40 hours of flight + ground testing the mild steel 2.5” resonator in our system was looking a lilt worse for wear.

The leading edge of the internal auger/spiral was disintegrating.

We have purchased a 304 stainless version that’s an inch longer and having it ceramic coated inside and out before reinstalling.

When I had the Glasair on the apron at full tilt the other day for some tuning of the newly installed EC3, a guy 

commented on its noise being similar to other quiet Lycomings. As in loudness, not pitch. 

I don’t know how much back pressure this type generates. Here they are called a “Gonzo”. They claim to be used in drag rotary application.

Would be interesting to instrument it, but I don’t think I can be bothered, as it seems to be developing good horsepower.

I expect this new stainless version will last much longer and be at least as effective.

But the proof will be when I run it up and next annual.

Here are some photos

Cheers

Steve Izett

Glasair Super IIRG