对于这一点，波尔玛也赞同，并且指出，用于常规轻型飞机的活塞式发动机行不通还有其他原因：要是有水渗入气缸内，它就不能工作了。

Polmar agrees, and points out that the piston engines used in conventional light planes are ruled out for other reasons: they would fail if any water leaked into the cylinders.

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该飞机使用活塞式发动机，而不是身材庞大的喷气涡轮机，因此它不会像大型商业飞机那样受到火山灰的负面影响。

The plane uses a piston engine rather than a large-scale turbine jets, allowing it to travel unaffected through the ash, unlike large commercial jets.

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研究结果表明，传统的估算方法对于装小型活塞式发动机的螺旋桨飞机也是适用的。

The result shows that the traditional estimation methods about powerplant performance are adapted for propeller aircraft even if with small sized piston engine and propeller.

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