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Tesla Roadster jump: how cold gas thrusters lift it
The Roadster cleared a row of Tesla cars, including a Semi truck. Two tricks explain it, underfloor suction for grip and cold gas thrusters for lift.
On 15 Oct, at a SpaceX test site in Texas, Tesla's new Roadster jumped over a row of Tesla cars. The row included the big Semi truck. No drone was involved. The car did it with two tricks.
Trick one, fans under the floor
Before the jump, the car has to grip the ground hard. To get that, fans under the floor suck the air out from beneath it.
With the air removed from under the car, the air outside pushes it down. That push is downforce. The car gets pressed into the surface, so it grips hard before the jump.
Trick two, cold gas thrusters
Gripping the ground doesn't explain how the car leaves it. That job belongs to cold gas thrusters.
A cold gas thruster is squeezed air blasting out of small jets. Think of a balloon you let go of. The air rushes out one way and the balloon goes the other.
The Roadster uses the same idea. The jets point down, the air blasts out downward, and the car goes up. Short blasts then land it softly.
So the two tricks cover different parts of the jump. The fans handle grip before it. The thrusters handle the takeoff and the landing.
Nobody was driving
No one was inside the car. The jump was programmed.
What to take from it
The reel ends on a question. How would you explain this in an interview? It's a good test of whether you can describe a system plainly. Try saying it in two sentences. One for how the fans create downforce, and one for how cold gas thrusters lift the car and land it.
If you can do that without reaching for jargon, you understand it. The interview answer gets posted tonight, so follow to catch it and compare it with yours.
Footage in the reel is from Tesla.
