. Automotive industries . ent. Unquestionably then, so long as this type ofcontrol has sufficient range, its proper handling will re-sult in a marked fuel saving. Will it receive such hand-ling? To realize how unlikely this is, it must be remem-bered that continuing the mixture impoverishment willultimately result in a blowback in the carbureter, alikely cause of fire. Knowing that safety depends on notreaching this condition and lacking knowledge as to howclose to it a given carbureter setting is, the pilot hasevery incentive to adjust away from, rather than toward,maximum efficiency. Even we
. Automotive industries . ent. Unquestionably then, so long as this type ofcontrol has sufficient range, its proper handling will re-sult in a marked fuel saving. Will it receive such hand-ling? To realize how unlikely this is, it must be remem-bered that continuing the mixture impoverishment willultimately result in a blowback in the carbureter, alikely cause of fire. Knowing that safety depends on notreaching this condition and lacking knowledge as to howclose to it a given carbureter setting is, the pilot hasevery incentive to adjust away from, rather than toward,maximum efficiency. Even were it possible to eliminatethe fire hazard, the problem would be far from flight, the only measure of performance ordinarilyavailable is that of power as indicated by the enginespeed. In spite of all evidence as to the benefit of thelean mixture from the standpoint of efficiency, such anadjustment, inasmuch as it results in lower power, theonly gage of performance available to the pilot, is boundto be March 3, 1921 AUTOMOTIVE INDUSTRIES THE AUTOMOBILE 505 The explanation of the disadvantages of the first typemakes clear the merits of the second. With this, as themixture becomes of poorer quality, the amount suppliedis increased. The natural adjustment, that for maximumpower, will be the one at which the decrease in qualityceases to be overbalanced by the increase in the design is such that this point is always reachedbefore the mixture becomes lean enough to cause a blow-back in the carbureter, there is a considerable safeguardagainst fire. Since this type of control permits the maximum weightof charge to be supplied only when the mixture quality issuch as to give a comparatively low power output perunit weight of charge, it is obvious that the greatestengine power will be slightly less than with types whichpermit the maximum power producing air fuel ratio tobe obtained when the maximum weight of charge is sup-plied. This constitutes the chief
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectaeronautics, bookyear
