The position of planes and primary crank positions is shown in Figure 4.0 (a) and (b), respectively. A four crank engine

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The Position Of Planes And Primary Crank Positions Is Shown In Figure 4 0 A And B Respectively A Four Crank Engine 1 (40.72 KiB) Viewed 37 times

question A and B
The position of planes and primary crank positions is shown in Figure 4.0 (a) and (b), respectively. A four crank engine has two outer cranks set at 120° to each other, and their reciprocating masses are each 400 kg. The distance between the planes of rotation of adjacent cranks are 450 mm, 750 mm, and 600 mm. a) If the engine is to be in complete primary balance, find the reciprocating mass and the relative angular position for each of the inner cranks, (15 MARKS) b) Determine the maximum secondary unbalanced force, if the length of each crank is 300 mm, length of each connecting rod is 1.2 m and the speed of rotation is 240 rpm. (10 MARKS) RP VO 120° 450 750 600 (a) Position of planes (b) Primary crank positions Figure 4.0