hardingfv32 wrote:flynfrog wrote:Once again the fences and the slot gap separators in this case are one in the same.
The "duct" on the lotus has nothing to do with the fences on the STR. They are probably taking an area of higher pressure and blowing the wing in one way or another to try to keep a flow attached at a higher AoA or they are trying to shed some drag.
If they are the same, then we have a slot gap separator that improves attachment and/or controls 'cross flow'. Why would Lotus dump flow on a device that promotes attachment or controls cross flow? Why not run a double slot gap separator system and the have a simple main element bottom surface in the center to route flow to.
The question: Why try to integrate the activities of two system that 'seem' to have opposite design goals?
They are required by rules to have a slot gap separator. My guess is this is causing an issue between the air foils. Extending the separator the back side of the wing may help with the issue they are having. I say guess because we don't know and we don't have enough evidence to make any other assumptions. The lotus device is completely unrelated