OK Everything seems to be working OK, but when it's idling, if I lift the plane to vertical while idling, it runs for a 5 seconds then dies. At full throttle and vertical, no problem, only at idle speeds. Does this mean the idle is too lean? Or is this normal for idle to die when vertical?
This being a beginners forum, its important to get the correct information out.
First, any plane at idle, held vertical for several seconds, is going to die. There isn't enough exhaust pressure and suction to draw fuel. The plane is never going to fly in that position anyway (at least not at idle).
The way to check low speed mixture is not just to let it idle. Determine you're lowest reliable idle. The plane should be able to hold that idle speed for a few minutes. You're looking for an idle speed around 2500-3000 rpm. Your lowest reliable idle may be higher than that until you get the tuning adjusted. Adjust your throttle trim as necessary to get this idle speed set.
Let it sit for about 30 seconds. Punch the throttle. If the plane hesitates, and then runs up, the low speed mixture is rich. If the plane goes to full throttle without hesitation, you're good to go. If the plane hesitates and then dies, you're to lean.
You can also try the Pinch test. With the plane idling, pinch the fuel line off. If the idle speed rises slightly before the plane quits, you a little rich on the low end. If the idle never changes, you're probably close. If it dies immediately, your probably lean.
The punch test more accurately simulates flight conditions, and is my preferred method.
Also after every slight change in the air bleed screw, you MUST reset the high speed needle.
As you dial in the tuning, you'll see your reliable idle reduce. But don't determine your tuning condition by the idle speed.
Brad