#Strida Bikes having fun in the wild 😆

Yes!

X vs Threads

LIFE HACKED - yep ROBOT jar opener will open an jar in seconds! ROBOTWIST ... youtube.com/shorts/gBEsKK1gC… via @YouTube

human_amp 23h JosephJoseph 'Can-Do' .... placed No1 with 100% score in Which Can Opener Tests …which.co.uk/reviews/kitchen-… (with Can-Do Plus No2) ..... Chuffed ✌️

A zero visibility landing is captured from the flight deck of a Boeing 737

Insightful - Design Innovation for aircraft - optimisation is nuanced kitplanes.com/design-innovat…

Battery storage can now enable wind and solar to produce continuous power at an economic price, reports an international agency. The old intermittency objection to renewables is losing its validity. euronews.com/2026/05/08/roun…

Low and Slow , With Bobby Bailey - Miss you 🙏

A 1940s cartoon imagining future cars.

Thanks to De Mauricio for reminding me about iF mode

Electric Sub 70Kg (unregulated) UK ultralight taking shape - airframe only 38kg but will go up to the line Rotec Rall-E FEA and CAD in @adskFusion

Imagine, it’s easy if you try, Electric, 3-Axis Sub70kg (deregulated) HINT: motor battery for 40min flight weighs less than 2stroke fuel 👌

There are few people arguing to replace jet fuel in planes with batteries so I assume your argument relates to cars? So some simple physics for you. Petrol - Energy content: ~8.9–9.5 kWh per L - Density: ~0.74–0.76 kg/L So: - 34 kWh ≈ ~3.7–3.8 liters of petrol - Mass ≈ ~2.8–3.0 kg - Specific energy ≈ ~12 kWh/kg Lithium-ion battery Typical pack-level energy density: ~150–300 Wh/kg So: - 34 kWh battery weighs ~110–230 kg - Specific energy ≈ ~0.15–0.30 kWh/kg Petrol is still about 40× higher energy density by mass. But for cars, this comparison is misleading. Unlike aircraft, cars are dominated by efficiency, not just energy density. 1. Drivetrain efficiency flips the story - Petrol engine efficiency: ~20–30% - Electric drivetrain: ~85–95% So usable energy: - Petrol: 34 kWh × 25% ≈ 8.5 kWh useful - Battery: 34 kWh × 90% ≈ 30.6 kWh useful Electric delivers ~3–4× more usable energy from the same stored energy. 2. Real-world range comparison Let’s convert that into driving range. Typical consumption: - Petrol car: ~6–8 L/100 km - EV: ~15–20 kWh/100 km From ~34 kWh: - Petrol: 3.8 L → ~50–65 km - EV: 34 kWh → ~170–220 km Despite being ~40× heavier, the battery goes ~3× farther. 3. Weight matters much less for cars than planes Cars are not nearly as sensitive to weight as aircraft: - Rolling resistance and aerodynamics dominate at speed - Regenerative braking recovers energy in stop-start driving - Extra mass has much smaller penalty than in flight So the “battery is heavy” argument is far weaker for cars than for planes. For cars, improving efficiency and cost often matters more than pushing extreme Wh/kg. In summary, Petrol has about 40× higher energy density than lithium-ion batteries by mass, but electric drivetrains are about 3–4× more efficient. As a result, an electric car can travel significantly farther than a petrol car using the same amount of stored energy, despite the battery being much heavier. For planes (and some cars) the answer lies perhaps in synthetic fuels. For the majority of cars, it lies in batteries. It’s just maths and physics. I’ll ignore the politics of war, but simply state that the more origins of energy that we have (oil, gas, solar, wind, nuclear, synthetic fuels, etc), the more unlikely we are to fight over them.

This man trusted physics when he was expelled at 80 km/h from a truck that was traveling at 80 km/h 🤯

Musk WAS my Hero - Engineering, Manufacturing, Design Innovations in energy, transport & space. BUT turned Twitter into a hate pit and supported the crazy orange narcist ;-( Redeeming Pod/Book of Mantras now inspires .. founderspodcast.com/

This machine stops wars. It’s a big fan of peace.

RT @SadiqKhan: When I was first elected, evidence showed it would take 193 years to bring London's air pollution within legal limits. Tha…

Tesla got the green light today from Ofgem to supply electricity across the UK! This is massive – disrupting the energy market with the proven Texas model (Powerwalls feeding the grid via VPP, real credits, lower bills). A big win for Tesla/Powerwall owners, the National Grid (more stability and clean flexibility), and everyday customers (better competition = cheaper, greener power). Here's my new video breaking it all down 🔋⚡️ #TeslaUK #TeslaEnergy #Powerwall #UKEnergy

Strida booth in Beijing, China

Animaris Rex is an 18-metre-long walking 'beach animal' propelled by the wind, created by Theo Jansen as a fusion of art and engineering.