Tesla & SpaceX shareholder. Tesla Solar & Powerwalls. Cybertruck with FSD. Starlink. -Grateful & happy. AI is a lever to move the world. Waiting on Optimus.
Tampa area Florida
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What if they just serve us; all the time, everywhere?
It doesn't make a scary Hollywood movie, but it would be wonderful.
This is among the possibilities.
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PUBLIC SERVICE ANNOUNCEMENT
SpaceXAI has been renamed SpaceXSI.
The similarity in sound between “SpaceXSI” and “Space Sexy” is entirely coincidental.
Any further discussion is discouraged.
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Deutsch:
Wie weit kommt ein Tesla Model Y in Deutschland mit nur 1 € Strom? Je nach Bundesland sind es etwa 10,7 bis 16,3 Kilometer. Im deutschen Durchschnitt bringt ein Euro Strom rund 13,3 Kilometer Reichweite.
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How far can ONE DOLLAR of electricity take a Tesla Model Y in your state?
At the U.S. average residential rate, about 19 miles. Depending on the state, that same dollar buys anywhere from 7 to 27 miles of driving.
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What if you could drive 83 miles for the price of one gallon of gas?
That’s what the numbers say for a Tesla Model Y at average U.S. energy prices. In some states, the same dollars buy more than 125 miles.
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43,000 Years of Nonstop Driving
Tesla FSD has now driven about 15 billion miles.
Assume an average speed of 40 mph:
15 billion miles = 375 million hours of driving.
That’s:
• 43,000 years of nonstop driving
• 187,500 human work-years at 2,000 hours/year
• Roughly 1.1 million driver-years at typical U.S. annual mileage
Even using a broad 30–60 mph average-speed range, FSD has performed roughly 250–500 million hours of steering, speed control, and path planning.
We talk about FSD in miles.
Maybe we should also think about it in human time.
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I get the appeal of big wheels and low-profile tires.
They look great. They give a car that concept-vehicle stance. The exposed brake rotor and colorful caliper are machine-head eye candy. And the shorter, stiffer sidewall can give sharper, more immediate turn-in.
I’m all for personalization and personal expression.
But on the potholed roads most of us actually drive, they seem like folly.
There just isn’t enough sidewall to absorb a hard pothole impact. The tire, wheel, or both can pay the price.
And sitting on the side of the road with a flat tire and a bent wheel isn’t cool.
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Tesla FSD just crossed ~15 billion miles.
The fleet is adding ~35 million miles a day.
A billion miles now takes 3to 4 weeks. At the start of 2026 it was 14 million a day.2026 alone will likely add more FSD miles than every prior year combined.1.5 million paid users. 55%+ of new North American Tesla vehicles leave with it on.The curve is taking off up and to the right.
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Tesla’s FSD just hit 15 billion miles today. The fleet is now adding about 35 million miles every day. That works out to roughly 405 miles every second, a new billion miles every 28–29 days, or 1.5 million miles per hour.
~1.5M active users.
55%+ of new North American Teslas ship with it activated.
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If Earth were a town of 10,000 people, fewer than two of them would be FSD users.*
Most don't even know about FSD.
Of those who know, most don't believe.
Of those who believe, most don't really understand.
You don't fully understand FSD until you've sat in the driver's seat and felt the car take over the driving task.
That's when the abstraction becomes real. That's when you begin to grasp what a profound societal change, and personal level-up, FSD represents.
*Using 1.5 million FSD users and a world population of about 8.32 billion: 0.018% of humanity, roughly 1 person in 5,550.
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3 or 4 Motors in the Tesla Roadster?
The current consensus is three: one front motor and two rear motors, giving independent rear-wheel torque vectoring.
That makes engineering sense. It follows the basic Plaid architecture Tesla already uses and delivers much of the benefit of independently driven wheels without the added mass, packaging, cooling and complexity of a fourth motor.
But could Tesla surprise us with four?
Two small, extremely high-output front motors would give the Roadster true four-wheel torque vectoring. The rear motors would help generate the desired yaw into a corner while the independently controlled front motors actively manage torque across the front axle, improving turn-in, cornering control and traction, especially at the limit or on mixed-grip surfaces.
Cars such as the Rimac Nevera already demonstrate what four independently controlled motors can do.
So what do you think Tesla chose?
3 motors or 4?
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Cold-rolled isn't a marketing phrase. It's a steel mill specification. Cybertruck's stainless is rolled so hard that Tesla says it would break a stamping press. It can only be bent along straight lines. Franz von Holzhausen's team turned what the steel allows into the style.
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0–60 in ~1 second takes about 2.7 g. But tires can only grip as hard as they're pressed down, and the car's weight alone gets you roughly 1 g. So the Roadster's cold gas thrusters have to do two jobs: shove it forward and pin it to the road.
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Flat for different reasons.
Cybertruck: cold-rolled, work-hardened stainless is too hard to stamp into complex curves. So Tesla bends and folds it. The flatness follows from the material.
F-117: 1970s computers could model radar bounce off flat facets, but not curves. The flatness follows from the math.
By the B-2, computing had caught up, and the curves came back.
F-117: "We can't computationally model the curves."
Cybertruck: "We can model them, but this material doesn't want to become them."
Same visual vocabulary. Born from completely different constraints.
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Tesla Recruiting
That line in a Tesla recruiting video is more profound than it sounds:
“Regardless of title or tenure, the best idea wins.”
Most large corporations don’t work that way. They become collections of fiefdoms and silos, carefully guarded. Rank matters. Territory matters. Who gets credit matters.
At Tesla, the ideal is different: reality gets the deciding vote.
It’s an engineering-first company trying to solve brutally hard physical problems at speed. Physics doesn’t care about your title, your tenure, or whose organization owns the problem.
Reality is a stern mistress. There isn’t much time for BS.
The best idea has to win.
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The Price of Doughnuts Has Gone Down…
relative to silver.
Yesterday I wrote that in the mid-60s you could buy a doughnut for a dime. Today, it costs about two dollars.
Then I remembered something.
The dime was silver.
Today, a doughnut costs about two paper dollars.
But a silver dime is worth two doughnuts.
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Dollars to Doughnuts
There was once a wonderfully lopsided American wager:
“I’ll bet you dollars to doughnuts.”
The meaning was simple. I’ll risk something valuable against something nearly worthless.
The economics worked.
As late as the mid-1960s, you could still buy a doughnut for a DIME!
I remember that time.
A dollar bought ten doughnuts.
Today, an ordinary doughnut costs around two dollars.
Think about that.
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CAN THE SPACEX ROADSTER ACTUALLY FLY?
An intriguing video from SpaceX’s McGregor test site has appears to show a Tesla Roadster briefly rising on its SpaceX cold-gas thrusters.
The video does not prove it. But it raises the question:
Is it even possible?
Could the Roadster actually make a hop like that?
Surprisingly, yes. At least the basic physics says it could.
A roughly 2,000 kg Roadster requires about 20 kilonewtons (20 kN) of vertical thrust merely to hover:
2,000 kg × 9.81 m/s² ≈ 19.6 kN.
Elon Musk has described the SpaceX option as using a high-pressure composite tank, or COPV, occupying roughly the rear-seat area and storing compressed gas at around 10,000 psi.
Cold-gas propulsion is inefficient compared with a chemical rocket. Assuming a specific impulse, Isp, around 70 seconds, producing 20 kN requires roughly 29 kg of gas per second.
That is an enormous flow rate. But a sufficiently large 10,000 psi tank could potentially store hundreds of kilograms of compressed gas. That puts a brief hover or several-meter hop within the realm of physical possibility. It does not make the Roadster an airplane. Think seconds, not minutes.
And falling tank pressure does not necessarily mean continuously falling thrust.
A pressure regulator can reduce the enormous tank pressure to a controlled pressure upstream of the thruster nozzles. With properly designed choked nozzles, mass flow and thrust can remain relatively stable while tank pressure remains above the regulator's operating threshold. Eventually the tank pressure falls too far and thrust drops rapidly.
An electrically powered compressor could recharge the system afterward. It could not begin to keep pace with a ~29 kg/s full-power discharge. That distinction may be the key to understanding the SpaceX Roadster:
It doesn't need enough power to fly for long. It needs enough stored pressure to do something spectacular for a few seconds.
-Super Grok + ChatGPT
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