EVALUATION OF THE ABSORPTION COEFFICIENT. 4.1 For each of the engine speeds at which the absorption coefficient is measured pursuant to paragraph 2.2 above, the nominal gas flow shall be calculated by means of the following formulae: for two-stroke engines G = V.n/60 for four-stroke engines G = V.n/120 in which: G = nominal gas flow, in litres per second (l/s) V = cylinder capacity of the engine, in litres (1) n = engine speed, in revolutions per minute (min -1)
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