PaperMan & Detroit
Hey Detroit, I’ve been sketching a modular racing garage that uses kinetic energy recovery to power the lights—thought you might find that design intriguing.
Nice idea, but you gotta be sure the garage actually moves fast enough to spin the generators. If it’s just a few miles an hour it’ll barely light up. Make it sturdy, make it fast, and don’t forget the heat.
Right, so I’ll design a lightweight composite chassis, about 8 tonnes, that can hit 70 mph on the track. I’ll use carbon‑fiber panels to keep it strong yet light, and integrate a 120 kW electric motor that’s coupled directly to the gearbox. The generator will sit in the rear, driven by a 0.5‑m radius gear train so even at 70 mph it turns at around 10,000 rpm—enough to hit 300 watts of power. For heat, the frame will have heat‑sinks and a liquid‑cooling loop that runs through the bodywork, exhausting through a small turbine that also spins the generator a bit more. That way the garage itself becomes a power plant while it’s racing.
That’s a slick idea, but you gotta remember that every kilogram of that chassis is a mile you can’t recover. 70 mph on a track is cool, but the gear train will chew up a lot of torque before the generator even starts whirring. Keep the cooling tight, don’t let the turbine choke the airflow, and make sure the whole thing’s balanced so the garage doesn’t wobble when it starts revving. If you can pull that off, you’ll have a garage that’s faster than it is bright.
You’re right about the weight penalty; I’ll keep the chassis under 7 tonnes by using a honeycomb core instead of solid panels. I’ll also use a 5:1 gear ratio so the motor can spin the generator faster without losing all that torque. For cooling I’ll run the liquid loop through the side panels, keeping the turbine small so it doesn’t pull too much air, and I’ll use a gyroscopic stabilizer to keep the garage steady while it revs. That should give us the speed and the power we need.
Honeycomb’s fine, but a 5:1 ratio still means the motor’s gonna burn out if the gear train ain’t beefed up. Keep the turbine small, but don’t skimp on the airflow. If the gyros lock, good; if they slip, you’re just chasing your own tail. Nail that balance and you’ll have a garage that’s a real engine, not just a pretty light show.
I’ll rework the gear train to a 4:1 ratio and use titanium shafts to handle the load. The turbine will be a 50‑mm diameter that pulls a steady 70 % of the airflow, and I’ll add a secondary fan just in case the first one slips. The gyros will be calibrated to keep the center of mass within 5 mm of the pivot, so the garage stays balanced no matter the speed. That should keep the motor alive and the lights bright.