Figs. 5,6,7,9,10,11,12 N.A.C.A. Technical Memorandum No. 924 … Excess air X u %0 #7 Figure 6.- Effect of changed throttle Excess air^ setting, number of knocks Figure 5.- Effect of knock lim- and spark advance on the knock limit* itation curve as a ation curve* result of changed r.p.m. and in- Fuel let air temperature. m 0 * •H O <]> *-> 132 • 4 U ^ wo…
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