传统的可调整线性电源在输出电压低时，电源的大部分额定功率耗费在电源内部，变换效率很低，而且体积庞大笨重。
At low output voltage, the majority of the rated power of traditional adjustable linear power supply is wasted in the internal power supply and the conversion efficiency is low with huge volume.
研究实验室通常耗费数周来调试这个系统，使它在标准功率测试时有良好表现。
The research LABS often spend weeks tuning their systems to perform well on the standard horsepower test.
但由于无尾桨系统要耗费更多的发动机功率，性能表现不好。
But the performance is poor because requires more power from the engine.
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