frontpage.
newsnewestaskshowjobs

Made with ♥ by @iamnishanth

Open Source @Github

Open in hackernews

Reviving a Modular Cargo Bike Design from the 1930s

https://www.core77.com/posts/136773/Reviving-a-Modular-Cargo-Bike-Design-from-the-1930s
34•surprisetalk•2h ago

Comments

analog31•50m ago
Three wheeled cars and trikes mostly moved to having the two wheels in front for stability when cornering. Same reason why 3 wheeled all terrain vehicles were taken off the market. Otherwise, cool idea.
DocTomoe•42m ago
See also: Reliant Robin.

Obligatory Top Gear link: https://www.youtube.com/watch?v=QQh56geU0X8

CalRobert•23m ago
I was so excited to try a cargo bike I made sure to rent a Cristiana bike on a holiday to Copenhagen with my pregnant wife. Then I crashed while turning with her as a passenger. She was displeased.

We now ride a two wheeled urban arrow. Three wheelers seem incredibly unstable except perhaps for ones with independently pivoting wheels like the babboe carve

tokai•13m ago
While super unstable three wheelers are good for very heavy or large loads. Like moving a refrigerator. Start stop city traffic with +100kg load is easier on three than two wheels. Must say I never liked riding the Christiania bikes myself.
econ•1m ago
The old ones in NL easily take 300kg. You just have to learn not to attempt sharp corners. A normal bike also allows you to jerk the steering wheel 90 degrees at high speed.
DocTomoe•44m ago
Pedals directly on the front wheel means no shifting the chain, which means you better have not skipped leg day if there is even the slightest hill on your route while you are fully loaded.
smlacy•41m ago
Electric motor though?
zellyn•41m ago
It apparently has a gearbox in the hub.
dmurray•34m ago
Isn't it the other way around? One revolution of your pedals gets one revolution of the wheel. Normally you'd get several revolutions out of it. So you need to pedal faster than you're used to, but each push is easier. It's like being in a very low gear suitable for climbing hills.

The penny-farthing solved this problem by having a very large wheel.

doctoboggan•28m ago
The chain is the transmission, and the shifting mechanism works with it. But you can easily have more compact gearboxes directly on the wheel without the need for a chain.
tokai•12m ago
>A three-speed gearbox in the hub makes starting easier.

It was not direct drive.

hombre_fatal•25m ago
That front bike section looks so cool. I guess it's so alien looking because the whole section turns instead of just the wheel which affords it more creative license than a traditional handlebar attached to a fork.

I bet it also feels alien to turn a steering wheel with your feet on bike pedals.

0xEF•8m ago
I'm not sure where you grew up, but in the US we had a kid's toy called a Big Wheel which your feet had to turn with when you turned the handlebars. It was wildly awkward, terribly designed, but we got really good at it, anyway. The pedals would even scrape concrete on turns often enough to wear them down.
jmercouris•22m ago
This design is unstable and expensive to produce with a complicated in wheel transmission. It is novel, but almost certainly more expensive and less reliable than existing designs.
iambateman•18m ago
Please excuse my hacker-newsyness…

This idea is absurdly underbaked…other commenters mentioned that it’s going to flip, and it is. Not to mention that no bike shop in the world will know how to work on these things.

There’s lots of reasons that this design died in the 1930’s after a short run.

But…so you know I’m a reasonable guy despite my blithering criticism…I love weird alternative vehicles and I hope that version two of this is a massive success because this world needs more tiny vehicles and fewer 8’ tall Ford F-150’s.

Best of luck!

oulipo•16m ago
Really good looking :)

You should definitely put a repairable Gouach e-bike battery on it haha https://gouach.com

btbuildem•16m ago
Tricycles are inherently unstable in turns, especially when not loaded down, because they cannot lean. And when carrying a load, the same rules of physics apply, resulting in a lot of torsional forces on the frame. There's a reason we see so few of those on the roads, amidst an explosion of various human-powered modes of transport.

Here's the original: http://youtube.com/watch?v=RuPwRQOUhl4

Here's the reimagined modern version: https://www.youtube.com/watch?v=kA7qGYNFuY0

In both cases, the rider effectively sits atop of where the handlebars would be on a traditional trike. You can see in the first video the lads have a hard time keeping all wheels on the ground.

One notable difference between the new model and the old is that they seem to have changed the geometry of the frame so that the driver doesn't lean into the turn (the turning wheel stays upright). They don't demonstrate it in motion very well, but that kind of turn action will tend to throw the rider "out" of the turn, making the trike fall over opposite of the direction of the turn. The old version tends to fall "into" the turn.

I can't think of many advantages to this design, other than the driving unit and cargo are modular. Even then, the rider would not be able to travel without the cargo portion.

Trikes are tricky, they don't go very fast, they don't turn well, and they're wider than most other pedal-powered vehicles, making them hard to use on existing cycle infrastructure.

econ•9m ago
If you have a large preferably rusty box in front of you the cars treat you like royalty.
matt-p•15m ago
It's totally mad and impractical; I love it!
dpedu•9m ago
While interesting, I feel like this would be difficult or at least feel extremely weird to ride. When you steer on a 2-wheeled bicycle, you countersteer, which is pushing the wheel left in order to go right, or vice-versa. But this has a steering wheel that I assume works like a car, you turn the wheel left to go left. It would feel weird riding a bicycle while having to remember to steer like a car.
gomox•8m ago
Lol @ what appears to be paddle shifters or paddle brakes [0] under a steering wheel on a bike??

[0] https://www.youtube.com/watch?v=kA7qGYNFuY0&t=77s

MomsAVoxell•5m ago
Revive? These things are still in active use all over Europe .. backfiet .. and while they’re fun, they can be exhausting if you overfill them with groceries, kids, roadkill, oilyballs, etc.

There’s a tricked out one in my ‘hood (Vienna) that has electric assist. I guess that’d be practical for a daily ride …

IneffablePigeon•2m ago
Did your read the article? It’s talking about a totally different design to a standard bakfiet.
uxp100•1m ago
When I look up backfiet I see a typical cargo bike, what the article is discussing is a design where you directly drive the front wheel (with a 3 speed hub in this case). Seems worse, but nifty.