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Ratios (i) 6.91 7.28   7.69  8.12   8.6    9.12    9.68 10.30 10.98 11.76 12.43 13.17 13.97 14.85 15.82 16.58
(kw/rpm) 0.625 0.609 0.575 0.549 0.520 0.491 0.463 0.435 0.408 0.382