The motor never heats up because the plane never spends any time in the sky. The prop moves freely when turned, now the prop is glued to the motor, so the propand the motor are thesame. When theprop is turning I can feel the air pushing against my hand, so I believe the motor/prop is tuning in the right way. I am using a 11.1 2100 <span class="squiggly" title="To see spelling suggestions, click this word" state="new" splc="splc" word="li">li</span>-power battery, the charge rate is <span class="squiggly" title="To see spelling suggestions, click this word" state="new" splc="splc" word="1c">1c</span> (<span class="squiggly" title="To see spelling suggestions, click this word" state="new" splc="splc" word="2.1a">2.1a</span>) The plane <span class="squiggly" title="To see spelling suggestions, click this word" state="new" splc="splc" word="e">e</span> was fine until Iupgraded the battery, but the problem with the sputtering of the motor has been with me since day one. I still don't know if this is a two problem or just one.