Google alert: CAD files and build playlist are hosted on google services
https://www.powercircuits.nl/home/open-source-tadpole-tilting-cargo-trike
Fully Built, Open Source Design
This is an image of the final build. It looks cool and it's great to ride (but still needs a few improvements).
The build videos playlist: https://yewtu.be/playlist?list=PL3uwHLwN7YKrodkpyXISvayLdFsccHNWB&si=lt0YrWmcryd8LzgT
There is a donation button on the source page as well
Awesome! A grocery store opened within biking distance from me this winter and I've been considering something like this for grocery runs. I'll check out the playlist over the next few days.
What improvements are you considering?
Sorry, I'm not the creator, but from watching his last video, the main feedback he would like to have is related to what would be the ideal distance of the axle needed to pretension the bearings of the hub, so it allows them to rotate freely and without any jiggling
The best success he had was using an axle that is 0.1mm shorter to tension the bearings. There are some schematics on the following video and more details around 8:00 mark:
"I Built 10 Tilting Trikes So You Don’t Have To"
As mentioned by @matchanik, there could also be mechanical improvements, both in terms of strength and ease of manufacturing, like the connection between the axle and the steering block.
It's possible that those two aluminum pieces, joined by a bolt, will fail in the short term. You have a high concentration of stress on the compression side, while the piece tries to separate on the tension side. It would be good to consider some way to manufacture that part as a single piece, or to pass the axle through and secure it along its entire circumference. Perhaps examining the actual Lefty fork could give you some ideas.
Other than the fun factor, what would be the point of this specific build? Is there a basket addition that goes in front that lets you carry stuff..?
Other than the fun factor
Do you really need another reason?
I'm joking, btw. It should also be easier to maneuver and less likely to roll over when turning, though I’m not sure how often that’s an issue with regular cargo bikes or trikes, since they’re not usually ridden at high speeds
There is also a cargo frame which is quite modular and you can change as needed depending on your needs, so you can attach a basket in case you prefer it