Posted by Kaibeezy 1 day ago
I liked that it had the dual speed walk mode. Don't want to be creeping around the yard.
It’s brought by all the NPOs in the world.
It’s simple, rugged, easy to repair, and cheap. You see them, all the time, on TV.
A friends dad sold his existing business and has been making $$$ in semi-rural texas importing and selling Chinese skid loaders. This market already exists.
The problem isn't the presence of electronics. It's the use of electronics as a proprietary layer to gatekeep physical hardware. When a tractor becomes a "software platform," the farmer loses the ability to perform basic maintenance because of DRM and encrypted ECU handshakes.
We need to treat the electronics as a component of the tool, not the owner of the tool. If the software is the only thing preventing a mechanical machine from functioning, that's not a feature but a defect
The HN crowd would enjoy the Global Village Construction Kit's work on an open-source tractor
https://www.opensourceecology.org/gvcs/
https://www.opensourceecology.org/portfolio/tractor/
https://www.opensourceecology.org/microtractor-workshop/
And their other open source machines they deemed "critical for civilization"
If it was legal to build these at industrial scale, we'd already have it in the US because there's blatant market demand for it. This is functionally no different from the shops putting 30 year old diesel engines in modern pickup trucks for the same reasons.
The emissions are so unreliable that the only legal market for vehicles without them in the US is... the federal government.
It could easily have been done with a basic ecu that was readable by a $20 cable to your laptop.
That being said, the DPF is the destroyer of modern engine reliability.
Modern diesel systems equipped with DPF tech (which consumes DEF, the fluid) require a regen cycle which is kinda like an oven cleaning itself - they get super hot and burn away particulate before they can be used again. Farmers are more frustrated by the system than the fluid. In fact, DEF is really just piss (urea) which is the same kind of product that they use for fertilizer. Although the prices for urea have skyrocketed recently so perhaps they truly do hate DEF too.
The awesome thing about these 'older' Cummins engines is yes they lack DEF systems and also have mechanical fuel injection. As is commonplace with diesel, there are no spark/glow plugs either. So ostensibly once you have the engine started, it requires zero electricity or computer systems to operate. The RPM of the engine dictates everything else mechanically through gearing. This is a big win for equipment that needs to "just work". Of course they still have sensors and all kinds of systems that are kinda layered on top... but they're not strictly required. This is also why the "runaway diesel" problem exists. You cannot stop an engine like this without starving it of air or fuel.
This is important to know in the context of tractors because in the US, 25-74hp tractors generally need only DPF without SCR (there are basically three bins depending on horsepower level). This makes these midsized tractors a bit of a sweet spot for a lot of tasks; of course, you still have to deal with regen (which is where the DPF gets heated up to convert trapped soot into gas), which is annoying, but you at least don't have to fill up with DEF or risk the DEF injection system failing.
https://www.swarmfarm.com/technology/
- West Australian grain farmer (4,500 hectares, barley, grains) reviews a fully automated driverless swarm bot in boom spray configuration: