Methinks I have an airleak somewhere, but wanted some other opinions to help diagnose. Here's the setup. Cox .049 Surestart on the nose of a Wally world glider. Flies fine, has plenty of power but the engine is acting oddly. I have a carb throttle on it, which until now worked fine, as you all are aware this simply restricts the carb-air intake...you know the drill. So anyway last flight, I was flying then decided to throttle back for a landing because the engine started running erratically, pulsing up and down. I figured I was near the end of a tank so thats what I assumed it was. I go to throttle back, and nothing, engine stays in same pulsing cycle. Long story short, it stays up for some time doing this, until the tank really does run dry, and I land, assuming of course the throttle servo was not functioning ot disconnected. Upon inspection, the throttle was functioning just fine, opening and closing (and I did this many times during the flight with absolutley no response
) and the plane was therefore running in this pulsing up and down cycle, and completely ignoring the fact that the air intake at the carb was being opened and closed. The only conclusion I can come up with is that shes got to be getting air from somewhere else to run like this no matter what the carb-intake is doing......thus....airleak-somewhere leak. What do you guys think? TIA!