Suggested Wicker sizes

[JeffW]

Does anyone have any ideas for the range of wicker heights for a single element vintage FA rear wing.

Is something like 1/8" to 1/4" in the ballpark?

Thanks,

JeffW

[Dee]

You are in the ballpark, in most cases the wicker should be 70 percent of the overall length of the wing. Go to Aerodynamics on apexspeed it's a good read
Dee
Rt5
Rt41

[Smittty]

Hey there, Just might want to check that 70 percent number.....seems a little "high" to me, if you like this sort of stuff, pick up a copy of "Racecar Aerodynamics", good read, especially the sections on interplay between the wing surfaces =- spacing, stagger, diffuser interaction and the like. And, just for fun, tuft the car, mount that camera of yours facing the aero in question, and film a session. Try differing heights, keep good notes on how the car feels and your times - in and out of traffic, and learn from the pics. Did my reynard years ago - eye opening!

[Neil_Roberts]

Here are some wind tunnel test results for Gurney flaps of various sizes.

[mjkhirvo]

Hey there, Just might want to check that 70 percent number.....seems a little "high" to me, if you like this sort of stuff, pick up a copy of "Racecar Aerodynamics", good read, especially the sections on interplay between the wing surfaces =- spacing, stagger, diffuser interaction and the like. And, just for fun, tuft the car, mount that camera of yours facing the aero in question, and film a session. Try differing heights, keep good notes on how the car feels and your times - in and out of traffic, and learn from the pics. Did my reynard years ago - eye opening!

70% meaning that the gurney does not have to be full width of the wing.

[JeffW]

Thanks Neil for sending along the link to that useful research paper on Gurney lips - very helpful. Looking at the graphs I have selected a "middle of the road" option which I think will be effective. Other options can be tried later.

Thanks,

Jeff W