1. crank arm = orange plate with cavity crank axis = black x cam 7 = blue plate inside cavity in crank arm cavity generator = closed red curve on blue plate camshaft = black dot in blue plate pedal = green line centered at camshaft hole in plate 2C = black elongated hole designer-specified pedal track = red track pedal track in a standard bicycle = black dashed track

2. crank arm = orange plate with cavity crank axis = black x cam 7 = blue plate inside cavity in crank arm cavity generator = closed red curve on blue plate camshaft = black dot in blue plate pedal = green line centered at camshaft hole in plate 2C = black elongated hole designer-specified pedal track = red track pedal track in a standard bicycle = black dashed track

37. crank arm = orange plate with cavity crank axis = black x cam 7 = blue plate inside cavity in crank arm cavity generator = closed red curve on blue plate camshaft = black dot in blue plate pedal = green line centered at camshaft hole in plate 2C = black elongated hole designer-specified pedal track = red track pedal track in a standard bicycle = black dashed track