Wings: Max Fore-Aft dim

[Janko]

Is there any limit on the wing dimensions for the F1000 class except for max height and widths?

I'm talking about the wing width, and not the maximum front and rear overhang.
Thank you.

[S Lathrop]

The front and rear "overhand from the wheel axis" applies to the wings. That is 100 cm front and 80 cm rear. That is any part of the wing, end fence or fasteners.

[Janko]

Thank you.

So as long as the wings are within the overhang, width and height limits, they are open to any interpretation.

The front and rear "overhand from the wheel axis" applies to the wings. That is 100 cm front and 80 cm rear. That is any part of the wing, end fence or fasteners.

[R. Pare]

Yes.

[Janko]

Thank you.
Now, can anyone shed any light on the previous Roll Bar Bend Radius thread?

Yes.

[S Lathrop]

The office in Topeka has trashed the roll bar rules. You can build any thing that you can get an engineer to sign off on.

I say that after my very negative experience in dealing with the Topeka administration. Topeka made me get an engineering analysis for my car which had been previously approved in 1994. I came up with the design after an SCCA legal roll bar failed. The hoop sheered of just above the roll bar braces. My 1994 design was 2 hoops joined at the top and attached to the frame on the same base as a SCCA legal roll bar would require. Both hoops were of the same material as required for a main hoop. The angle between the 2 hoops was less that the 30 degree minimum. A hoop and a brace would have met the angle minimum.

Topeka has also approved a design that has not been legal since the late '70 and every FF that had this type design was forced to change in order to race.

By the way there is no standard for what meeting the load standard means. Does it require that the roll bar not collapse but it may yield or does it require that the roll bar not yield? There is an enormous difference between the 2 cases -- not collapsing and not yielding. And what is the standard for deformation of the impact point or area?

The minimum radius is based on tubing diameter and wall thickness. The radius is 3x the tubing OD or for 1.375 that is 4.125 center line radius bend. That bend can only be done on a mandrill type bender or by sand packing the tube and bending. It also says that the tubing must not be less than .070 wall thickness in the area of the bend. Now the rules require that all roll hoops use 1.375 dia tubing. But there are cars out there that have way less than the minimum radius bends and most likely less than the minimum wall thickness on the outside of the bend. But an engineer signed off so it is legal.

Also, the Clayton's came up with a very clever roll bar design that clearly meets the letter of the rules and results in a minimum frontal area for the roll bar structure. I remember when a similar design was prohibited but it may be acceptable now. I am bitter only because I was not nearly clever enough to think of it myself.