Here's what I'm working on, a little background story first.
Picture this! It’s a hot August night and two street rods are sitting side-by-side on a deserted, straight stretch of road, just outside of Strasburg. The fields on both sides of the road are filled with kids, just waiting for the action to begin. Both cars are gassed up, the drivers are cranked up, both bragging about how much faster they are than the other. A friend walks out in the middle of the road holding a white handkerchief high above his head, he’s the official starter. Both cars are teasing each other; fake starts, fish-tailing back and forth, blueish-white smoke, plus the smell of burning rubber. The starter takes his position; it’s time to put the pedal to the metal. The roar of the souped-up engines is deafening and just like that, the starter drops his hand and both cars lunge from the starting position, the coupe popping a wheelie, the sedan’s tires gripping the road and taking off like a bullet. The coup finally drops down and in a burst of speed, catches up to the sedan, mid track. Both are headed for the finish line, a quarter of a mile from the start when out of nowhere, the local police, with lights flashing and siren blaring, pulls out from his resting spot, pulling the plug on today’s races. Both street rods come to an abrupt halt, backing up to the starting line and calling it quits. Well, not really, they’re just giving the cop a little time to go about his business so the whole sequence of events can start all over again in a few minutes.
As I see it, I need the following: (parts of this have been started a few years ago)
1 servo to make the sedan fish tale
1 servo to make the coup fish tale
1 servo to make the coup pop a wheelie
1 servo to operate the starter’s arm (could be done with a motor instead)
1 motor to operate the chain drive of the sedan
1 motor to operate the chain drive of the coup
1 motor to operate the police car pulling out (could be a servo)
1 flasher unit for police car lights
1 voice chip for sound effects of cars
1 voice chip for police car siren
I have no problem making all the mechanical parts for the moving items. I’ve already made a “sled” that moves the cars and holds the hobby servos for the fish-tailing and the wheelie. The “sleds” are made of Plexiglass and ride inside two “U” shaped aluminum channels that are 6 feet long. I have two of these, one for each street rod. I’ll power the “sleds” with a chain drive, roller chain inside of industrial chain guide. I just bought an automobile power window motor that has a lot of torque, it pulls 3.5 amps at 12 Volts DC. If that won’t work, I’m sure I can find something that does. I’d like the cars to be able to change speed so that one can look like it’s overpowering the other. Everything must be timed just right; I strive for realism as much as I can. Plus, it all has to be fool-proof both mechanically and electronically, I can’t work seven days a week and I don’t have anyone that’s reliable enough to do any repairs, other than myself. I build it, I fix it!
I'll post some pics of what I started 13 years ago as soon as I figure out how to do it.