Just a couple of pennies worth of info. I think alot of it has to do with the engine type. small two stroke glows need RPM's to keep up in the hover, primarily due to the large diameter, low pitch props. My magic likes steady throttle,with quick shots to regain/maintain control. I think alot of that has to do with the small rudder on the magic, and it is more effective at lower speeds with instant throttle blasts. Larger two strokes (os 1.60fx for example) have larger displacement, and inherently more low end torque/power. This allows larger props, with greater pitch as well. I think that given that larger torque/power curve, along with the increased pitch, means you need to burp the throttle up n down to keep in a relative steady hover. A steady held throttle can tend to either lag the motor/plane down (falling out), or giving extra thrust (making the plane climb). 4strokes are similar in the fact that they have greater torque vs a 2stroke of similar displacement. You can turn at least 1-2" larger diameter prop, which is going to aid in hoverability. I think the same thing applies to gas motors, but on a lot larger scale. Just as people say larger planes fly better, larger props "pull" better. The "size" of the air(density/displacement) doesnt change between a .40 and a 40%, but the amount of air displaced increases exponentially the larger you go. Youre pummeling alot more air with the larger prop, just as a larger wing will support you better. The 40% planes are extremely unrealistic in their flight envelopes, power to weight ratio, and handling (not that im complaining ) than their full scale counterparts.

Bursting the throttle will accomplish a couple of things. It will load and unload the prop, which will pull you up, and drop you down. It will also react to the torque of the engine, and spin you around faster (or in my case, knock me out of the TR ) If you watch the vids of the big guns, by burstin the throttle, they maintain a small altitude change(obviously more stable than a large altitude change, specially at low low low altitude), while spinning faster n faster on motor torque alone, not having to add aileron to spin them.

Could be wrong about these items, but it sounds neat saying it LOLOL. Maybe the big guns can throw in the real scoop.

Steve