Finally maidened my Sea Gull Ultimate 90 BiPe with a OS 1.20AX this weekend. Two marvelous flights first thing in the AM. Ran like a swiss watch.
Switched to my 30cc MX2 for a bit then went back to fly the Ultimate. Fired up perfectly, sounded crisp, tuned a little on the fat side like I prefer them. Not blubbering rich, just a little thicker trail of smoke than most run. I run every glow motor a little fat.
3 minutes into the flight, straight and level flight crossing the fiel following a stall turn and... SILENCE. Just shuts off. I thought I had the idle trim too low. Bring her around into the wind land, re-fire her. 3 minutes, straight and level again, about half throttle after a Split-S and... SILENCE. Just shut off again.
Details -
Fuel tank is slightly below carb centerline, but this cannot be adjusted.
Motor is mounted horizontally.
Brand new "hot" plug after the first flameout.
Brand new "med-hot" plug after the second.
Bryon 10% fuel / 16% syntehtic (if memory serves)
Cowl is hogged out big time, Plenty of airflow in and out.
Pitts style Muffler.
No obvious signs of leaks, drips or airleaks,
Quick fueler receptacle in line.
Any ideas? I have heard about the "trick" of using a "F" plug in it, but hadn't tried that yet. Frankly I am alittle worried about that idea.
The Ultimate is an amazing flying airplane and I cannot wait to get her sorted out and back in the air.
