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3D-Printed Parts Let You Assemble Your Own Biggest Fan

It’s getting close to the time of year when we need to start carefully vetting projects here at Hackaday. After all, nobody likes to get punked by an early April Fool’s joke. But as silly as this outsized PC fan looks, it sure seems like a legit build, if a bit on the pointless side.

Then again, perhaps pointless is too harsh a word to use. This 500-mm fan is by [Angus] over at Maker’s Muse, and it represents a lot of design work to make it buildable, as well as workable and (mostly) safe. Using both CNC-cut MDF and printed parts, the fan is an embiggened replica of a normal-sized case fan. The fan’s frame had to be printed in four parts, which lock together with clever interlocking joints. Each of the nine blades locks into a central hub with sturdy-looking dovetails.

And sturdy is important, as the fan is powered by a 1,500 Watt brushless DC motor. With a 4:1 reduction thanks to a printed gear train, the fan spins at around 3,300 RPM, which makes a terrifying noise. There’s a little bit of “speed-wobble” evident, but [Angus] managed to survive testing. The fan, however, did not — the 3D-printed gears self-destructed after a full-speed test, but not before the fan did its best wind tunnel imitation. And the RGB LEDs looked great.

An ultra-cheap electric car conversion kit is FINALLY here!

We’ve showcased plenty of EV conversions on the channel before, but up until now they’ve mostly been high-end, beautifully refurbished classics. In this episode, Jack heads to France to investigate the entry-level of EV conversion. For €5,000 after government subsidies, a company by the name of Transition One claims it can turn your old banger into a no fuss, no-emissions electric car. Is this the answer to overpriced new cars? Could this be the key to accelerating EV uptake? Check out the episode to find out.

00:00 Welcome to a crusty Fiat!
1:54 Welcome to Transition One.
3:35 One very charismatic founder.
5:30 How does it work?
7:37 The gearbox lives!
8:50 How much??
12:12 Range and specs.
13:39 Who fits it?
14:43 How many orders?
15:35 When can I buy one?
17:12 Final thoughts.

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140-year-old Rusty Batteries Offer Huge Breakthrough For Energy Storage

While it may be too late for the breakthrough to allow mass adoption for consumer electronics and electric vehicles, Professor Chiang believe it could revolutionise energy storage for large-scale renewable operations.

He has founded a startup, Form Energy, to further develop and commercialise the technology, with the hope of rapidly pushing forward zero carbon energy solutions.

DocGo unveils first all-electric, zero-emission ambulance in the U.S.

The last-mile mobile health services provider, DocGo, has announced the delivery of its new all-electric, zero-emissions ambulance that eliminates the pollution of a standard gasoline ambulance.

The all–electric vehicle will be the first of its kind to be registered in the U.S. The new vehicle has been developed in partnership with Leader Emergency Vehicles in South El Monte, CA, and marks the first step towards “Zero Emission,” the company’s latest sustainability mission to have an all-electric fleet by 2032.

DocGo stated that its new vehicle produces 1/10th of the pollutants expelled by a standard gas-powered ambulance. In addition to being less harmful to the planet, the electric ambulance has the potential to lower patient transportation costs due to lower fuel costs and maintenance needs.

The Hydrogen Stream: Universal Hydrogen builds manufacturing facility in the United States

Abundant fuel cell raw materials and renewables potential could add up to a green hydrogen economy in the Philippines, according to Jose Mari Angelo Abeleda Jr and Richard Espiritu, two professors at the University of the Philippines Diliman. In a paper published in this month’s Energy Policy, they explained the country is a latecomer to the sector and should develop basic and applied knowledge for training and research. The country should also establish stronger links between industry and academia, the report’s authors suggested. “The establishment of the Philippine Energy Research and Policy Institute (Perpi) is a move towards the right direction as it will be instrumental in crafting policies and pushing for activities that will usher for more private-academ[ic] partnerships for the development of fuel cell technology in the Philippines,” the scholars wrote. “However, through enabling legislation, a separate and dedicated Hydrogen Research and Development Center (HRDC) will be pivotal in ensuring that sufficient government and private funding are provided.” The authors reported progress in the production of fuel cell membranes but few developments towards large scale production, transport, and storage facilities. “The consolidation of existing renewable energy sources for hydrogen production can also be explored in order to ensure reliable and sustainable hydrogen fuel supply,” they wrote. “This is because the country will gain more benefit if it focuses more on the application of fuel cell technology on rural electrification via renewa[ble] energy-based distributed power generation, rather than on transportation such as fuel cell vehicles.”

Paris-based energy engineering company Technip Energies and Indian energy business Greenko ZeroC Private have signed a memorandum of understanding (MOU) to explore green hydrogen project development opportunities in the refining, petrochemicals, fertilizer, chemical, and power plant sectors in India. “The MOU aims to facilitate active engagement between the teams of Technip Energies in India and Greenko to step up collaborative opportunities on a build-own-operate (BOO) model – in which Greenko will be the BOO operator and owner of the asset and Technip Energies will support with engineering services, integration and EP/EPC [engineering and procurement/engineering, procurement and constructrion] – for pilot and commercial scale green hydrogen and related projects in India in order to offer economically feasible technology solutions to clients,” the French company wrote today.

Study calls for curbing congestion

SSTI and the UW–Madison-based Mayors Innovation Project recently released a new report arguing for a different approach that incentivizes diverse ways to travel to and from new developments. By funding public transportation, limiting parking and preserving the walkability of neighborhoods, Sundquist’s team argues, cities and states can reduce congestion better than if they only plan for cars.

The same solutions can help cities meet their policy goals, such as reduced emissions or more equitable access to services for residents.

“We look at the gap between policy goals on the one hand and the way decisions are being made that actually make things happen in the real world,” says Sundquist. “Often you have great policy goals, and then you have a bunch of rules of thumb that are still basically what was set in the ’50s during the interstate era.”

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