Show Valve Area Vital Vital- Vitalin in Motors fp T HE matter of valve area in proportion to the capacity of the motor motor motor mo- mo tor cylinder has long been recognized recognised by engineers as one of the determining factors in the efficiency of a motor A large valve area was early found to give best results because it permitted quicker scavenging scavenging of tie the ili burnt gases and a quicker filling of the cylinder with fresh gas on the intake charge To Pro get this large valve area the builders of po et cl valve motors were forced to resort to dual valve systems f declares a a. prominent lo local local local lo- lo cal distributor A A single valve large enough to obtain the desired re result was apt to warp under the intense heat of high s speed e Operation The use of tho the double number of however gave a large number of added complications and not a little power was absorbed in overcoming overcoming over over- coming coining the tho resistance of the double number of valve springs It is evident however that tho the designers of the new type motors motors motors mo mo- mo- mo tors have no such problems to contend with Since the tile dual valves are aro merely ports cut in the walls of the cylinders and sleeves it is obvious that any desired proportion between b tween the valve opening and cylinder content can be easily obtained by increasing or decreasing the size o of the ports As As a a. I result ul the dual valve lve motor in the tho six-cylinder six type has bas a valve efficiency fully as great as though twenty four v valves of th tb type were employed and n needless to say the tho result is attained in a very simple fa fashion hion |