Made the 4th and 5th flights on my new U-Can-Do 3D .46 last weekend. The 5th flight ended in the same manner as the 2nd flight; the engine suddenly quit while in level flight. No warning, no surging, no leaning out or anything. Other than this "feature," the engine sounds good and is running in a rich 2-cycle, even when climbing straight up. I've tried 3 different glow plugs, including non idle-bar (OS #8) and a K & B idle-bar type. No joy. I just ordered and received some new Fox idle-bar plugs, so I'll try those next.

The engine is a well used, but in good condition, Super Tigre G.61. Good compression, stock carburetor. I installed a Perry pump into the backplate of this engine a couple of years ago and it worked well in conjunction with a Perry pump carburetor while I had the engine installed in my faithful Super Kaos. The Perry carb was damaged when my Kaos augered in, so I initially tried a backup Perry carb on the first day I flew my UCD. I couldn't get a decent idle, so I field-replaced the Perry with the stock carb and bypassed the pump. Ran great for first flight, pooped out (quit) part way through second flight, as it also did on the 5th flight.

Since last weekend I've hooked up the Perry pump to the stock carb to see if it helps (or, makes things worse). According to some info at Tower Hobbies, the stock Super Tigre carb will work with a Perry pump (the blue one).

To be continued...

Kaos