Build a DIY Lap Timer for a Backyard Race Track
Build a DIY timer to perfect your motorized trike lap-times around your backyard.
trike
The 600 hour Groovy Velomobile – Trike by Dave Langkamp
If you saw Dave Langkamp riding down the street in his Radius T-T velomobile, you might think he’s reliving the Duck Soup running gag glory days (and well, maybe he is).