4 ms·The fact it's going forwards.by wizzwizz4 5y agoThe fact it's going forwards.Vvector 5y agoAnd what's making it go forward?Retric 5y agoThe wind.wizzwizz4 5y agoThe propeller pushing backwards on the wind uses up less energy than it gets from the wind blowing it – when it spins backwards to “keep pace with” the wind, that means the wind is faster than it and it can get boosts from the wind.