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标题: 请教一题: Rotary engine [打印本页]

作者: ivy1976 时间: 2014-8-3 18:21
标题: 请教一题: Rotary engine
请教一题:

In theory, the Habbendorf rotary engine could be a greatracing engine, but in practice, it is not. The reason is that the availablefuels do not have sufficient octane to obtain maximum performance from theengine.

The answer to which of the following questions would be mostrelevant to evaluating the adequacy of the explanation given above for why theHabbendorf rotary engine is not a great racing engine?

A. If the Habbendorf rotary engine were to operate atmaximum performance levels, how would its performance compare to that of enginerecognized as a great racing engine?

B. At what level of octane in its fuel does the Habbendorfrotary engine achieve maximum performance?

C. What levels of speed, acceleration, and efficiency mustan engine display in order to be considered a "great racing engine"?

D. Could a Habbendorf rotary engine be modified so that itis able to achieve maximum performance with the fuels currently available?

E. If a car equipped with a Habbendorf rotary engine were torace against a comparable carequipped with a great racing engine, by now muchwould the performance of the great racing engine surpass that of the Habbendorfrotary engine?

(The correct answer is A.)

能帮解释一下吗?先谢了

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