So, when I light up my outdoor heater, the blue flame starts off outside the mantle (the inner glowey bit in the pic), and after about ten seconds of warming up, the flame jumps inside the mantle where it starts to turn the mantle red hot. Presumably this is the same thing that happens in a camper lantern. Nothing I do will cause the flame to jump inside until it's ready. If I blow on the flame, it will momentarily blow out outside the mantle, burning inside for a second, but then it jumps back outside on it own. Only when it's good and ready will the flame jump inside the mantle. Is it the relative coolness of the mantle that's stopping ignition from occurring inside the mantle until it's the right temp?