ความคิดเห็นที่ 11
The aviation gasoline now used is graded 81/87, 91/98, 100/130, and, for the later planes, such as the Boeing Stratocruiser, 115/145.
Aircraft engine developments created the dual number fuel rating.
The first number is the "lean mixture rating." It indicates how the fuel resists knocking with the engine adjusted for economy while cruising.
The second number is the "rich mixture rating."
It designates antiknock quality with the engine at maximum power during takeoff and climb.
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