A skid block is a common term for a mandatory attachment to the underside of a racing car. Initially applied to Formula One cars in 1994, it has also been used in other categories including Formula 3000 and Formula Three. It is a flat rectangle, usually made of a wood composite, designed to impose a minimum ground clearance and to limit the use of ground effects to enhance handling.
These parts, a left and a right skid block, will be fitted to a car racing at Lime Rock Park. We have found Jabroc to be the hardest and most consistent plywood we have cut, and we cut a lot of plywood varieties.
A customer needed some architectural elements to add to a custom made glazed door. Something that obviously could not be done with standard wood working machinery. These accents will be coped into an existing muntin. We also made a shaper sled for the coping operation by routing out a negative pocket in a 3/4" mdf blank so the part could snugly fit inside and have the trailing end of the cut be backed up to prevent blowout when its run against the shaper fence. This extra step provides for an accurate cope cut and safety for the operator by not having their hands close to the shaper cutter.
This is all you have......forget the idea of getting your hands on an AutoCad drawing. No worries. Let us figure it out!
First, we plot out a rough Autocad drawing with our software and from there we make a pattern for a close fit. Typically we use splines over arcs as we find the meeting of curves to be fairer. We compare this pattern to the template and tweak as needed until we are dialed in.
Here's the pattern made from 1/4" MDF
Then its just a question of setting up the blanks and applying the toolpaths.
Just takes a little patience.
Incidentally, we mirrored the pattern ( made a back to back pair ) as the narrow part at the bottom stood a good chance of being blown out (the blank is over two inches thick). The blank perimeter has been squared up so the pairs can be ripped on a table saw running against the fence. We have accounted for a 1/8" kerf in the middle of the pair. The bridges that hold the cut part in place will then be flush routed off the part and you are ready to go!