> Aka simple 2d diagrams don’t result in wingtip devices Why not? You have a flat plate with high pressure below and low pressure above. Air escapes around the

> Aka simple 2d diagrams don’t result in wingtip devices Why not? You have a flat plate with high pressure below and low pressure above. Air escapes around the end of the plate at the wingtip from the high pressure to the low pressure area, reducing net force. So you put some sort of barrier to impede the flow - a wingtip device.