Exact(30)
And, the jet pilots say, their engines are more reliable.
What is not as widely understood is that smaller engines are more efficient at every power level.
In theory, hydrocarbons that can power planes and diesel engines are more valuable than ethanol, which has to be blended.
That's because engines are more efficient when they are working harder, and small engines are almost always working harder than big ones.
The data collected can be invaluable to airlines: it enables Rolls-Royce to predict when engines are more likely to fail, letting customers schedule engine changes efficiently.
Fairer to consider is the stubborn factor that, although diesel engines are more economical, petrol remains noticeably cheaper at the pumps.
Similar(30)
Today the indexing by search engines is more important than the corresponding information: those who control the map control the territory.
And my estimate for improved technology, such as lighter yet strong metals or carbon fiber and advanced engines, is more like $10,000 per vehicle, not $1,300 and I'm being modest.
Merrimack burned only to the waterline, however, and her engines were more or less intact.
Several previous questionnaire-based studies and surveys that used traffic counts as exposure metrics, have suggested that heavy traffic powered by diesel engines is more harmful for respiratory health than light traffic powered by gasoline engines [ 13, 34].
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