litchralee

There was a video by PolyMatter recently on the economics of why Apple cannot yet move the bulk of iPhone manufacturing away from China (available on Nebula and on YouTube). This is perhaps the singular quote which helps answer your question, around the 02:35 mark:

Any country can assemble the iPhone. But Apple doesn't need to make an iPhone, it needs to make 590 every minute, it needs 35,000 per hour, 849,000 per day, 5.9 million per week. That's the challenge facing Apple.

The sheer scale of Apple's manufacturing -- setting aside Samsung's also humongous scale -- means that there might not be a supplier for that quantity of large image sensor or new-tech batteries. Now, Apple could drive that sort of market, and they probably are working on it. But as the video explains, Apple's style is more about finding an edge which they can exclusively hone, up to and including the outright buying out of the supplier. This keeps them ahead of the competition, at least for long enough until it doesn't matter anymore.

In some ways, this might sound like Apple has a touch of Not Invented Here Syndrome, but realistically, consumers expect that Apple is going to do something so outlandish and non-standard that to simply be jumping onto a bandwagon of "already researched" technology would be considered a failure. They are, after all, a market leader, irrespective of what one might think about the product itself.

Historical example of heavy R&D paying dividends until it stopped being relevant: Sony's Trinitron CRT patent expired just around the time that LCDs started showing up in the consumer space. Any competitor could finally start producing CRT TVs with the same qualities as a Sony Trinitron TV, but why would they? The world had moved on, and so had Sony.

In brief, Apple probably can't deliver to the world a new iPhone with massive image sensors right now. But that certainly doesn't mean they wouldn't have their camera team looking into it and working with partners to scale up the manufacturing, such as by increasing yield or being very clever, probably both. Ever since that one time an iPhone prototype was found in a Bay Area bar, their opsec for new prototypes has been top notch. So we'll only know when we know.

I've added this clarification to my comment. Thanks!

It seems that common types of rubber have a propagation speed in the range of 1.5-1.8 km/s, so we're still quite a bit away from 10.5 km/s.

Whoops, force of habit. Fixed now to not be bicycle speeds lol.

Let's break this down into parts:

send a spaceship into space

Assuming we're launching from Earth's surface, we will need to: 1) get safely away from the ground (or else we'll crash first), and 2) achieve an orbital velocity of at least 11 km/s, which is needed to escape the influence of Earth's gravitational pull. If we launch from the equator and launch towards the east, we get the free benefit of the equatorial velocity, which is about 0.44 km/s, so that reduces our required speed to "only" 10.56 km/s.

huge slingshot

The thing with all machines that yeet an object into the air is that they're all subject to the trajectory calculations, again due to that pesky gravity thing. As much as we'd like things to be as easy as "point and shoot" in a straight line out into space, the downward force of gravity means we must aim upward to compensate.

Normally when one thinks of trajectory, it is to aim an artillery piece in such a way that it'll land upon a target in the distance, but typically at about the same altitude as where it was launched from. But if the artillery piece is perched upon a hill aiming down into a valley, then a smaller angle correction must be made because it would hit farther than intended. When aiming at a target located higher than the gun, the correction would be a slightly larger angle.

In this case, to aim into space -- assuming we mean something near the Karman line at 100,000 km above MSL -- that's a substantial height and we'll need to aim the slingshot with a substantial vertical component. The exact angle will depend on what horizontal component we need, which was discussed earlier.

how much rubber band

The relationship between the necessary vertical component (to overcome gravity) and the horizontal component (to reach escape velocity, which is caused by gravity) can be drawn as two orthogonal vectors, with the rubber band having to provide the angled thrust equal to the sum of those two vectors.

We've ignored air resistance, but with this simple relationship, it's clear that we can use basic trigonometry and the Pythagorean theorem to find that the rubber band vector is the sum of the square of those two vector magnitudes. Easy!

The only problem is that, on its own, the square of some 10.5 km/s is a huge number. Even 10.5 km/s without squaring is a huge number, already exceeding the speed of sound in air (0.343 km/s) many times over. I vaguely recall a rule somewhere that elastic deformation cannot exceed the speed of sound (EDIT: within the material -- see excellent comment below), for reasons having to do with shockwave propagation or something like that.

But I think it's all fairly intuitive that for a rubber band slingshot to accelerate an object, it too must be in contact with said object while accelerating. And while a rubber band contracting can reach air's speed of sound (barely remaining intact), it cannot go much beyond that nor accelerate another object to thoss speeds. To then ask for the slingshot to accelerate to 30x the (air) speed of sound would be asking too much.

For this reason, I don't think the rubber band slingshot to space will work, at least not for a typical linear slingshot. If you do something that rotates and builds velocity that way, then it becomes feasible.

I'm sure there's a market for electric skateboards as art pieces rather than as transport or for fun. Do I think the market is huge? Def no lol

I can't get over the severe protrusions that means this thing will run aground on almost any surface protrusions. It's like those motorized shoes we saw a while back, where they built it and later found the one use-case it was good for: warehouses, which have very smooth floors.

How much were those ebikes priced at?

Given the payload requirement and the trailer, would an electric bike be acceptable? Yes, it would be larger but is also more dynamically stable than an e-scooter at the same speed. And the bike trailer wouldn't need much changed at all to attach to a bike.

For an all-in-one solution, an electric trike might also work, with the benefit that your dog can ride in the basket straddling the rear axle. Although electric trikes don't tend to come in below $1k USD.

At last, small shoe size comes in clutch!

After staring at the Ninebot Max lineup for long enough, and reading some reviews about the long-term reliability of the internal charger on the G30p, I found that the G30lp eschews the internal charger, meets my specifications, costs a bit less, and perhaps most relevant right now, it's available refurbished through Walmart for $315+tax with a 90-day return period.

So while I won't get to experience the joy of onboard charging, I get a bit of time to try out this e-scooter and see if it's for me or not. Plus, I can always build my own adapter to allow the brick charger to connect to EV charging stations haha.

also uses just a standard "desktop computer cable" for charging

As an afficionado of the IEC 60320 electric power couplers, this adds an outsized plus-modifier to your recommendation. I will look into this some more. Thanks!

Whoops, fixed!

Nice rack!