Make it handle

[robnolimit]

Start with the top pict, #1. This is my best wat to show how the camber and Instant Center move, as the suspension is compressed. (outside tire in a turn). The black line is at Ride Height, and shows the position of the Instant Center. When the suspension is compresed (pink lines) note the the angle of the spindle changes - the camber increases. Also, the IC moves in and down.

Pict #2 shows the same base comparison, but with the upper A-arm raised at the ball joint. Because this makes the two ball joints farther apart, the upper arm starts farther up on its arc. And when the suspension compresses the same amount, the spindle lays over a bit farther, giving more camber change. Also, the IC is is in a different place. And although hard to see, it doesn't move as much as before.

Pict #3 is a base graphic of the A-arm arc. Both arcs, yellow and pink, are 20 deg spreads. You can easily see that by starting farther up the arc, the lateral movement is increased. - good for the upper arm, - bad for the lower.