According to NASA, typical speeds for these aircraft range from about 1,200 kilometers per hour to about 2,400.

根据NASA的数据显示，这些飞机的典型速度的范围在每小时约1200公里至2400公里之间。

The only minor drawback of this added  feature is that it produces extra drag, slightly reducing the aircraft's range.

这一新增功能的唯一小缺点是它会产生额外的阻力，从而略微降低飞机的航程。

Qantas intends to start flying this route nonstop once aircraft range allows, however, it’s only a measly 10,500 miles or 17,000 kilometers.

一旦飞机航程允许， 澳洲航空打算开始直飞这条航线，然而，它只有可怜的 10, 500 英里或 17, 000 公里。