Cambo
Posts: 1516
Joined: 6/20/2005
From: Phoenix,
AZ, USA
Status: offline
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I got my cap with the DL out at the field today. I was hopeing to fly it but ended up spending the most time getting the engine to start. I first tried starting it at my house with my dad. Not even a sputter. The tank was barely full so i figured i would completely fill it and head out to the field were a someone who has experience with gassers could help. We kept going through the procedure, cholk, spin, fire, no cholk spin, start. Nothing. It would caugh once or twice but never stay running. The gasser guys were baffled. We noticed the engine had very little compression but we were not sure if that was the problem. So, we kept trying. A few times it would run for a 1-2 seconds but would always die. Someone suggested using the fuel pump to force some fuel into the carb. On a side note, one of the main problems we had today was the throttle servo was POORLY setup (nylon pushrod). It was VERY unprecise in the bottom range so we really had no idea if the throttle was closed, or at idle, or half way open. Back to starting the engine. After we flooded the carb with my fuel filler pump i went to start. Flipped it through once, nothing. Again, nothing. Once more............................BRRRRAAAAAAAAAAAAAAAAA. The engine was at half throttle. I must have leaped ten feet it scared me so much. But my dad was strongly holding the plane so i was safe  . The engine was running strong. FANTASTIC transition but a rough idle. We decided to kill it and try starting it again. Nothing, it burped a few times but wouldn't start. So we did the same thing with the fuel pump and got it started again. This time, one of the gasser guys walked over and said my low end was way to lean. He richened ut up and the idle calmed down. We killed it, tryed to start it again (the normal way), and it fired right up. We repeated this a couple times with success. So i guese my needles were out of wack. The gasser guys say that if the low end is too lean it will not draw fuel to well. I would have guesed it was a rich idle from my glow experiences. At full throttle the plane lifted off the ground. It has amazing power. I am getting 6200 RPMS on a xoar 22-8. And that was its first run ever . I can't wait untill it breaks in and i move to a 50:1 blend. BTW, the plane is 13.5 pounds.
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RE: DL-50 engine - 
