The theory was to drill small holes at regular intervals to remove extra material without diminishing strength. It s a simple and common method used in mechanical design. A familiar use can be seen in bridges, airplanes, and some high end ultralight bicycles.
The problem arises if one makes the holes too big, leaving too little material. There are fancy strength of material equations I have long since forgotten to determine the optimal proportions, but in this case I was swagging it. (SWAG = Swinging Wild Ass Guess)
Obviously from the photo I guessed wrong. To my defense, I was pounding the stakes into extremely dense and rocky West Virginia Appalachian clay.
So, what have we learned?
- West Virginia has really hard dirt.
- Coleman uses cheap-ass aluminum for making cheap-ass tent pegs.
- I need to dig out my engineering books. (Duh)
- Experimentation leads to useful info, even if it is what not to do.
Back to the drawing board...