
Martin Dirker
9.1K posts
Martin Dirker
@martindirker
Expert in shape optimization for aero or structure. Inventor, artist, maker, designer of wheels, engines, art objects, race cars.
Benoni, South Africa Katılım Eylül 2011
2K Takip Edilen394 Takipçiler
Martin Dirker retweetledi

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34. similarsites. com — find similar websites
35. shortcuts. design — design shortcuts list
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Martin Dirker retweetledi

She broke her leg parachuting at 17. At 18, she refused to bail out over the ocean and saved her plane on fumes. By war's end, she'd flown more aircraft than any pilot alive.
March 1, 1922. Pretoria, South Africa.
Dolores Theresa Sorour hated her name. She renamed herself after Jackie Rissik—a South African hockey star who didn't let anyone tell her what women couldn't do.
Young Jackie had the same attitude.
At 15, while other girls learned piano and etiquette, Jackie was at the airfield taking flying lessons. Her brothers mocked her. "You're too small to handle a plane," they laughed.
She got her license at 17—the youngest pilot in South Africa.
Then she decided to do something no woman in her country had ever attempted: jump from a plane wearing a parachute.
The authorities tried to stop her. Women don't do that. Too risky. Inappropriate.
Jackie borrowed a pilot's chute and jumped from 4,000 feet anyway.
She landed badly among a group of polo players and shattered her leg.
That broken bone would later save her life.
By 1938, Jackie had moved to England to earn an advanced flying certification. South Africa had no schools willing to train women beyond basics. If she wanted to become exceptional, she had to leave everything familiar behind.
Then Germany invaded Poland in September 1939.
Jackie tried joining the Royal Air Force. They laughed her out of the recruiting office. Women fly? In combat? Absurd.
So she joined the Women's Auxiliary Air Force and spent months staring at radar screens in a bunker—watching German bomber formations as glowing dots while RAF pilots scrambled to intercept them.
She was watching the war from underground while desperate to be in it.
July 1940. Everything changed.
The Air Transport Auxiliary was recruiting. They needed civilian pilots to move military aircraft from factories to fighting squadrons. Dangerous work—flying unfamiliar planes in terrible weather with no weapons, often no radio, using only a pocket manual for guidance.
Jackie was 18 when she joined. The youngest woman they'd ever accepted.
The men called themselves "Ancient and Tired Airmen." Most had been rejected by the RAF for being too old or injured. The women? They just wanted to fly.
Jackie excelled immediately.
Give her any aircraft—Spitfire, Lancaster, Tempest, Hurricane—and twenty minutes with the instruction booklet. She'd figure it out. Takeoff, delivery, land, repeat.
Eighty-three different aircraft types. Some she'd never seen before climbing into the cockpit.
By war's end: 1,500 successful deliveries. Two hundred more than the next closest pilot.
But numbers don't capture what she survived.
January 5, 1941 started like any other mission. Jackie was ferrying an Oxford trainer through miserable weather—thick fog, driving rain, zero visibility.
Another ATA pilot, Amy Johnson, was flying a similar route that same day.
Both got disoriented in the storm.
Amy followed proper procedure: she bailed out over the Thames Estuary when things got desperate. The freezing water killed her. Her body was never found.
Jackie saw the Bristol Channel appear through the fog beneath her. She had maybe twenty minutes of fuel left. No idea where she was. Visibility measured in feet.
Protocol said bail out. Use the parachute. Let the plane crash.
Jackie remembered her broken leg from 1938. Remembered the agony. Made a split-second decision.
She dropped to wave-height and flew blind on fumes until she spotted land.
She landed safely.
Amy Johnson—more experienced, more famous, following the rules—died that day.
Jackie—breaking protocol, trusting her instincts—lived.
Months later, flying a Tempest over Surrey, Jackie spotted something that made her blood freeze: a V-1 rocket heading for London.
These German flying bombs were unstoppable once launched. When they ran out of fuel, they dove and detonated—obliterating entire city blocks.
More story⏬⬇️

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Martin Dirker retweetledi

THE WORLD GOES TO SCHOOL DIFFERENTLY:
1. Finland: No major exams until the final year of high school. Teachers are highly educated and respected. Consistently one of the best education systems in the world.
2. Japan: Students clean their own classrooms daily. Respect and responsibility are taught before academics. Character comes first.
3. South Korea: Students study until midnight. The university entrance exam is so critical that flights are rerouted on exam day. Burnout among young people is a serious national crisis.
4. United States: Standardized testing dominates everything. School quality depends on neighborhood wealth. Rich areas get better schools. Poor areas get what is left.
5. Germany: At age 10 students are placed into different school paths. Vocational training is taken as seriously as university. Youth unemployment stays low because of it.
6. India: The system runs on memorization and high-stakes exams. 1.5 million students compete for just 17,000 IIT seats. Pressure begins long before a child is ready.
7. Singapore: Ranked number one globally for math, science, and reading in 2022. Extremely competitive. Even the government admits student pressure has gone too far.
8. France: Philosophy is a required subject and counts toward the national exam. Students are trained to think critically and argue clearly from a young age.
9. Cuba: Education is completely free at every level. Literacy rate sits above 99 percent according to UNESCO. One of the most educated populations in Latin America.
10. Netherlands: Students are assessed at age 12 and placed into paths that suit their strengths. Academic and vocational routes are treated equally. No path is seen as lesser.
11. China: The Gaokao exam determines almost everything about a student's future. Pressure starts in early childhood and is carried by the entire family, not just the student.
12. Kenya: Primary school became free in 2003. Secondary school fees still push many families to breaking point. Dropout rates in rural areas remain high.
13. Russia: Historically strong in mathematics, science, and engineering. The system valued compliance over curiosity. That tension still shapes education today.
14. Brazil: Private schools are well funded and deliver strong results. Public schools are severely underfunded. Where you are born almost entirely determines the education you receive.
15. Denmark: University is free for Danish and EU citizens. Students also receive a monthly government stipend just for attending. Education is treated as a public good, not a personal expense.
16. Canada: Each province runs its own education system independently. Quality varies across the country. Indigenous history inclusion in the curriculum is real but still inconsistent.
17. Australia: Universities are strong and globally respected. Indigenous history is now formally part of the national curriculum. The debate over equal funding between public and private schools remains unresolved.
18. Sweden: No formal grades until age 12 or 13. Early pressure is believed to kill curiosity before it grows. Research consistently supports this approach.
19. New Zealand: Māori language and culture are officially part of the national curriculum. Legally protected but depth of teaching varies greatly between schools.
20. Switzerland: Two thirds of students enter vocational apprenticeships rather than university. Both paths are equally respected. Both lead to strong careers.
21. Norway: Public university is free for everyone including international students. Teachers must hold a master's degree. Teaching is one of the most respected professions in the country.
22. Israel: Schools emphasize critical thinking and entrepreneurship from an early age. Combined with technical military training, this directly feeds one of the most active startup ecosystems in the world.
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Martin Dirker retweetledi

Look at this Norwegian church. It has been standing through Norwegian rain for over 840 years.
The trees were prepared for nearly two decades before anyone cut them down.
Workers walked into old-growth pine forests and stripped the chosen trees of their tops and their branches. The trunks stayed standing for fifteen to twenty years. The roots kept pulling resin upward. The pitch bled out of every old branch socket and saturated the heartwood from the inside.
By the time the trunks were felled in winter, the heartwood was no longer wood. It was malmfuru. Ore-pine. Functionally pressure-treated lumber, except the pressure was applied by the tree itself, for free, across two decades before construction started.
That is why iron was rejected. Iron rusts. Iron expands and contracts on a different cycle than the wood around it. After 100 winters iron splits the fiber and the joint dies. Wooden pegs swell with moisture in the same direction as the staves. The joints get tighter over time. Tongue-and-groove walls. Ground sills on a stone foundation. Four corner posts carrying load down through stone, never up through soil.
Then the tar. Pine roots and stumps stacked under clay, lit on fire, burned for two days under controlled airflow. The wood decomposes into pitch. The pitch gets reapplied to the church every 10 to 15 years. Including this decade.
Norway built around 2,000 stave churches between 1150 and 1350. 28 survive. Borgund is the best preserved because its corner staves rest on stone, not soil. The ground never won.
Modern lumber arrives at the construction site finished.
Borgund's builders made the lumber finish itself.
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Martin Dirker retweetledi

Men admire in women masculine virtues (self-accountability, logic, composure, self-command) expressed through feminine embodiment - not as an imitation of man, but as a refinement of character.
Women admire in men feminine virtues (empathy, tenderness, intuition, receptivity) expressed through masculine embodiment - not as softness without toughness, but as completeness.
So each sex seeks the best of its own principle integrated in the opposite, their natural polarity preserved but elevated.
Men and women are thus seeking the best of themselves in their opposite in stable contrast - a marriage within so there can be a marriage between - recursive union - what beauty!
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Martin Dirker retweetledi

Game theory proves that people do not act on information. They act on incentives. You can give a person all the data they need to make a better decision, but as soon as that decision threatens their position or costs them something visible, they will try to ignore the data. Before you ever try to convince anyone of anything, map what it costs them to agree. The cost of agreeing is the obstacle, not the argument.
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Martin Dirker retweetledi

ECONOMICS JUST KILLED DIESEL. #TeslaSemi production started April 29, 2026 (2 days ago).
Same load. Same route.
$111 electric vs $358 diesel.
→ 69% cheaper energy
→ 3.2X cheaper to operate
→ $247 saved every single trip
Who’s ready for the electric freight revolution? 🚀

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Martin Dirker retweetledi

Elon said something that stuck with me.
He said the hardest part of being him isn't building the rockets, it's caring about everyone he can't save.
That single line changes how you see him.
Most people think the secret to Musk is intelligence. Or work ethic. Or risk tolerance. They miss the real thing.
His edge is that he has a heart.
In a world optimized for cold optimization, where every CEO is trained to maximize shareholder value and minimize emotional exposure, Musk does the opposite. He builds what moves him. He fights for what matters to him.
A 15 year old girl named Liv Perrotto designed a Shiba Inu plush in 30 minutes. She had cancer. Stage 4. The plush was her contribution to Polaris Dawn, the SpaceX mission that flew higher than any private spaceflight in history. She named it Asteroid.
The plush flew. It became the mission's zero g indicator. The first thing that floated when they hit space.
Liv died in January.
Before she died she wrote eight wishes for Elon. The eighth one was simple. Make Asteroid the official mascot of SpaceX.
She knew she wouldn't see it happen. She wrote it anyway.
When the request reached Elon, he didn't have to respond. He's the richest man alive. He gets thousands of dying wishes. Most go unanswered, that's just math.
He answered this one. He said yes.
Asteroid is now the SpaceX mascot. Because a 15 year old girl drew a dog and asked the most powerful man in the world to remember her.
This is the part nobody understands about Musk. He could have ignored it. The optimal capital allocation move was to ignore it. The brand calculation said ignore it. The lawyers said ignore it.
He didn't ignore it.
People debate whether he's a genius or a clown, a hero or a villain, a savior or a scammer. They miss the point entirely. The reason he keeps winning isn't his intelligence. It's that he hasn't optimized away his humanity.
The other tech founders are smarter at certain things. They have better processes. Better PR teams. Better political instincts. None of them would have made Asteroid the mascot of SpaceX. Most of them couldn't tell you the name of a child who died of cancer last year.
That's the gap. That's the moat. That's why he beats them all.
In a world that rewards detachment, Musk's superpower is that he still feels things. The Tesla mission was personal. The SpaceX mission is personal. Neuralink is personal because his son was non-verbal until eight. Even the Twitter purchase was personal, his obsession with free speech tied to his own censoring.
Every project is downstream of something he actually cares about.
That's why he can work 100 hours a week for 20 years without burning out the way normal people do. Burnout comes from doing things that don't match your values. He's never had to do that.
Liv didn't get to see her plush become the SpaceX mascot. But she wrote it down before she died, and the most powerful man alive said yes, because somewhere underneath the rockets and the satellites and the AI companies and the trillion-dollar valuations, he's still the kid who cried watching cartoons.
Most people lose this by 30. They call it growing up. It's actually atrophy.
@elonmusk kept it.
That's the whole secret.

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Martin Dirker retweetledi
Martin Dirker retweetledi
Martin Dirker retweetledi

After the devastating 2011 earthquake and tsunami crippled the Fukushima Daiichi Nuclear Power Plant, a remarkable group of retirees answered the call for help.
More than 200 retired engineers and professionals, all aged 60 and older, volunteered to work at the damaged facility. They formed a unique unit known as the Skilled Veterans Corps, with the explicit goal of stabilizing the reactors while shielding younger workers from dangerous levels of radiation exposure.
The initiative was spearheaded by 72-year-old retired engineer Yasuteru Yamada. He argued that older individuals were better suited for the high-risk tasks because they had fewer years of life ahead of them, meaning the potential long-term effects of radiation would be less devastating compared to younger workers with decades left to live.
Alongside fellow retiree Nobuhiro Shiotani, Yamada recruited doctors, cooks, singers, and other experienced professionals, all driven by a profound sense of duty to their country.
The group made it clear that their mission was not a suicide pact, but a practical and ethical decision to use their lifetime of skills for Japan’s recovery while protecting the next generation. Their selfless offer earned widespread admiration and respect, becoming a powerful symbol of sacrifice and civic responsibility in the face of crisis.

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Martin Dirker retweetledi

Congrats to the Tesla team.
This is a watershed moment for freight in America.
$0.15/mile EV vs ~$0.50 diesel
($0.60+ when diesel spikes)
Operating costs are the hero. Once fleets see it at scale and production ramps, sales will rocket.
EV trucks will take over the roads.
Extended POV:
This isn’t about specs. It’s about economics under utilisation.
Freight is brutal: high miles, heavy loads, tight margins. That’s exactly where EVs dominate.
Core specs that matter: • Range: 325–500 miles (523–805 km)
• Gross combination weight: up to ~82,000 lbs (37 t)
• Energy use: ~1.7 kWh/mile fully loaded
• Battery: ~600–900 kWh est
• Motors: 3 independent rear motors
Charging flips the model: • Megawatt charging (MCS) capable
• ~60–70% in ~30 mins
• ~400 miles recovered in a stop (real-world target)
• Depot charging overnight = lowest cost energy
Now the key part:
At ~1.7 kWh/mile
→ $0.15/mile assumes ~$0.09/kWh depot energy
Diesel: → ~6–7 mpg
→ $3–4/gal = ~$0.45–0.70/mile
That gap is everything.
And fleets scale that instantly.
Then layer in:
• near-zero idling losses
• far less maintenance (no engine, gearbox, exhaust systems)
• regenerative braking reducing wear
• higher uptime
And the system gets even stronger:
→ solar + battery depots pushing energy cost toward zero
→ load balancing across fleets
→ software routing + charging optimisation
→ predictable operating costs vs oil volatility
This isn’t a truck upgrade.
It’s a system rewrite.
Diesel = fuel logistics
Electric = energy + software
Fleets don’t buy hype. They buy cost per mile.
Once they hit scale production, it won’t be gradual.
Fleet is where the system flips. ⚡🚛
Tesla Semi@tesla_semi
First Semi off high volume line
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@mustufa4socials @elonmusk There's no water loss in cooling a data center.
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@elonmusk We could save a lot of water because of this, I just hope it doesn’t disturb space’s ecosystem
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Just walked into my temporary home in Florida. Fridge full of food. Clean, safe, everything works. Hot water, lights, WiFi , all instant. The people? Friendly across the board. Genuine welcomes from everyone I’ve met.
This is what South Africa could have been. A place of dignity, opportunity and peace. Instead, we watched our culture, languages, religion and heritage deliberately undermined for political power. Painful to leave. Grateful to be here. Time to rebuild. #NewChapter #SouthAfricaToUSA
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Martin Dirker retweetledi

“It is just as wrong not to do the right things as it is to do the wrong thing.”
Most people think being “good” means avoiding bad actions.
Don’t lie. Don’t steal. Don’t harm.
So they live carefully… but passively.
And they call that morality.
But that’s not enough.
True morality isn’t passive. It’s not about staying clean— it’s about acting when you know what is right.
Because the moment you clearly see the good, you are no longer neutral.
You’re responsible.
If you see truth and stay silent…
If you see injustice and look away…
If you know what should be done and choose comfort instead…
You haven’t avoided wrongdoing.
You’ve chosen inaction over your higher self.
You weren’t meant to just avoid evil.
You were meant to create good.
Every moment you recognize what is right is a test:
Will you act from clarity -- or retreat into convenience?
Doing wrong blocks your development.
But so does hesitation. So does delay.
So does “I’ll do it later.”
The world doesn’t just suffer from bad people.
It suffers from people who know… and don’t act.
The question for you is:
Where did I stay silent, hold back, or choose comfort over truth when I should have spoken and acted?
Because in the end;
your life is not only shaped by what you did wrong…
…but by all the good you saw clearly
and left undone.
The good only lives through those who choose to act.

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Martin Dirker retweetledi

Today I touched down in Florida as a refugee — on South Africa’s Freedom Day of all days. A day meant to celebrate liberation became the day I finally stepped into my own.
Leaving the country of my birth was not easy. It was painful, heartbreaking, and symbolic. I walked away from a place I loved deeply, but where daily life had become a struggle for safety, dignity, and opportunity.
As the plane lifted off, I felt the weight of years of frustration, fear, and disappointment. I left behind a system that had stopped serving its people, a government that had forgotten the meaning of freedom, and a reality where hope was becoming harder to hold onto.
And then I arrived here — in the United States — and for the first time in a long time, I felt possibility again. I felt welcome. I felt safe. I felt human.
The kindness I’ve received, the respect, the sense of order and opportunity… it’s overwhelming in the best way. I am deeply grateful to the American people for opening their doors and giving me the chance to rebuild my life with dignity.
Today, on a day that South Africa calls Freedom Day, I found my freedom in America.
A new chapter begins — and I will honor it with hard work, gratitude, and hope. @RynoJvVuuren @POTUS

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