Originally Posted by
overthehillmedi
I like the spring loaded flag idea but I would be tempted to weld a carbide saw tooth to the end of it.
I don't generally have much problem with getting buzzed, but if I did, I'd sure be thinking in those terms!
I like the idea of a carbide tip. A 1/8" carbon fiber kite spar would have less air resistance, be fairly stiff but would give when hit. Be sure to put a small red flag on it; then when the car hits it there's no "I didn't see it" excuse.