j4k3

joined 2 years ago
MODERATOR OF
[–] j4k3 4 points 10 hours ago (3 children)

At the equator, Earth is nearly 25k miles around. So you need to travel around 1050 mph. The speed of sound is usually under 800 mph, so you'll be going a good bit faster than this. That is going to be one impressive fuel tank. Still that is a whole lot less than the 17k mph you need to get to the space station.

[–] j4k3 3 points 11 hours ago

Cars were really only for the ultra rich until Ford started making them in an assembly line. The world wide numbers are in the tens of thousands until the late twenties and early thirties when Ford got up into hundreds of thousands of cars per year.

Generally the first real car is credited to the machine Benz's wife drove into town at one point. That had a differential on an axle and it was this addition that really made it into a complete machine that one could use. Still, Benz did not make many cars at all per year. It was in the thousands, but at this scale, these were only for the ultra rich.

 

This is part of an interesting photo album on archive including pictures from Lake Tahoe and Santa Barbra, Catalina, and spots in Nevada during the gold rush. The photographer apparently ran a photography business in Goldfield. There are lots of photos of a fire where the town burned down along with several photos from when it was first established. The photos are mostly around 1900 but span from the 1890's to 1940's. It is basically someone's life in more general events and places (not personal experiences) from the gold rush era. They were not great at photography, but not terrible and this makes an interesting view into a slice of real life at the time.

https://archive.org/details/csfcp_000063/page/n93/mode/1up?view=theater

 

The Balloon Cycle

There floated over the hamlet of Ville neuvye-la-Garenne, the other afternoon, in mid-air, a balloon. Suddenly it appeared to burst and fell rapidly toward the earth. Fearing that a disaster had occurred the terrified folk ran to the spot at which they expected the aerostat would reach the ground, when to their amazement they saw a parachute detach itself from the car and descend gently. Immediately the earth was touched one of the passengers jumped upon a small bicycle which he had brought with him from the aerial regions, and he disappeared in the direction of Levallois, in the neighborhood of Paris, as rapidly as the machine could carry him. The explanation of this singular occurrence is simple. The balloon was the Caliban, and the ascent was made from Levallios by Captain Capazza and M. Hervien, the latter being the cyclist. Their object was to test the possibility of a balloon being used for carrying war dispatches, and they assumed that an enemy succeeded in destroying it. Yet they proved that by means of the parachute they would be able to make good their escape and to outdistance their pursuers with the aid of a portable bicycle.—London Telegraph

https://archive.org/details/BRM_1894101801/page/n5/mode/1up?view=theater&q=Balloon

[–] j4k3 2 points 14 hours ago (1 children)

A lampooning Charlie Chaplin and his brother:

https://www.youtube.com/watch?v=hYP2Q_1knvo

That includes actually mounting and riding along with messing around.

Racing footage from 1928:

https://www.youtube.com/watch?v=8HRpVV_x3N4

[–] j4k3 4 points 15 hours ago

I can't get it to come down

 

Recently a bicycle race from Bath to Kensington, 106 miles, for the (captaincy) and (subcaptaincy) of the Middlesex Bicycle Club commenced in the Bath Market-place, the competitors being Mesate, Pearce, Leaver, Goulding, Percy, Tyne, Spencer, and Walker. The diameter of the driving wheels varied from 45 to 52 inches. The first six miles of the race, which was over a capital road, were done in a very short space of time. At Newbury, which is about midway, the first two riders to arrive were Walker and Tyne. Here the wheel of Tyne's machine collapsed, making him lose two hours in the first half of the race. He went on again, but was quite out of the running. The race was won by Mr. Walker, of the Middlesex Bicycle Club, who started at ten minutes past five a.m. and arrived at Kensington at fifteen minutes past three p.m. - the greatest speed on record for the distance.

Sorry for any errors.

So a modern rider typically takes at least 4 hours to do a century ride and that is at top amateur/pro levels. Averaging 25 miles per hour for that long is very difficult. Most avid club cyclists will average around 16 mph in the real world and can finish a century in around 6-7 hours.

In this race, it started at just after 5 am and was won by the finishing rider just over ten hours later at fifteen minutes past 3 pm. So the average speed of the winning rider was just over 10 miles per hour. You'll have to forgive me for not knowing metric time but in real units, the race was 170 km, and the average speed was 17 kph.

In terms of wheel size, the 700c wheels of today are around 28in in diameter. The racers here were riding between 45-52in. So 45in is 1.143m, and 52in is 1.32m

I speculate that these were likely Penny-farthing or Ordinary velocipedes

The frame is a single tube following the circumference of the front wheel, then diverting to a trailing wheel. A mounting peg is above the rear wheel. The front wheel is in a rigid fork with little if any trail. A spoon brake is usually fitted on the fork crown, operated by a lever from one of the handlebars. The bars are usually mustache shaped, dropping from the level of the headset. The saddle mounts on the frame less than 18 inches (46 cm) behind the headset.

One particular model, made by Pope Manufacturing Company in 1886, weighs 36 pounds (16 kg), has a 60-spoke 53-inch (130 cm) front wheel and a 20-spoke 18-inch (46 cm) rear wheel. It is fitted with solid rubber tires. The rims, frame, fork, and handlebars are made from hollow, steel tubing. The steel axles are mounted in adjustable ball bearings. The leather saddle is suspended by springs.[32]

Another model, made by Humber and Co., Ltd., of Beeston, Nottingham, weighs only 24 pounds (11 kg), and has 52-inch (130 cm) and 18-inch (46 cm) wheels. It has no step and no brakes, in order to minimize weight.[33]

A third model, also made by Pope Manufacturing Company, weighs 49 pounds (22 kg) and has forged steel forks. A brake lever on the right of a straight handlebar operates a spoon brake against the front wheel.[34]

All three have cranks that can be adjusted for length.

https://en.wikipedia.org/wiki/Penny-farthing

The original posted article from 1874 is on page 2 at the top right of the news paper archived here: https://archive.org/details/NPDP18740922/page/0/mode/2up?q=bicycle&view=theater

[–] j4k3 1 points 17 hours ago

You would not last very long term like that. To be sustainable in space all elemental cycles are directly monitored and critical. Nothing is anonymous or unimportant. Heat is actually the most critical resource in space at scale if you want to keep living. Heat is the most difficult waste product to deal with because there is no differential to exploit and radiating into space is not very efficient.

This goes into several other aspects of my story and where I think the future is headed. I believe planets are prisons and not where humanity will colonize or travel to in the future. Gravitational differentiation of heavy elements is resource scarcity hell and escaping gravity well prisons is unsustainable. Almost all resources we currently use have total effective reserves less than 100k years at most. The only reason Earth has this level of resources is due to tectonic activity which is likely due to the Theia collision. We're not going to find another planet with the same combo as earth within 20 parsecs... I could go on and on. Once we effectively access a m-type astroid it will completely change the meaning of wealth and kickstart the colonization of places like cislunar space. A single planetesimal core based m-type astroid can easily dwarf all the resources humans have ever had access to on the surface of Earth.

Life stabilizes at in the most efficient configuration. The waste of the present is nowhere near the most efficient state, and it has lead to a lot of looming problems. The only thing holding us back from O'Neill cylinders in cislunar space right now is total accessible wealth. Once we have such structures in cislunar space, it becomes much easier to access many other resources that are even further away from gravity prisons. I strongly believe we will do everything possible to avoid the heavy costs of planets and in so doing we will learn to manage the complexity required to survive. This increasing complexity management and pursuit of efficiency mimics nature and it is the only way we have a chance to last for millions of years.

[–] j4k3 2 points 20 hours ago

You leave me couched but obsequious despite my apparent cloysome temerity in lexis and style

[–] j4k3 1 points 21 hours ago

There are always people willing to explore or try new things. Most people see a cliff face as a barrier, but a few see a challenge to climb it.

[–] j4k3 1 points 21 hours ago

::: spoiler The funny thing is that this was somewhere between buying a bike at Walmart or Bikes Direct. This was an attempt to bypass the dealer's ("agents" in the nomenclature of the era) margin overhead and sell at wholesale pricing direct to consumers. They're acting like a rogue distributor, which is exactly what Amazon is doing in general today.

No reputable brands can engage with any business on this direct to consumer level. From a manufacturing perspective, what and how much of a product to produce is a major dilemma. The only way to mitigate this dilemma is to do preseason ordering with dealers that can predict their future local market with accuracy. The manufacturer proposes a set of products and costs while the dealers decide what they are confident enough to invest in. The manufacturer makes the bulk margin on bikes while the dealer is in the game to sell accessories in order to break even on the business as a whole while all profit is generated by servicing bikes. There are usually margins between 25-45% from ultra high end to bargain junk bikes, and most accessories sold are at least keystone (50%). However, overburden inventory is what kills most bike shops within a decade.

I was a professional Buyer for a chain of bike shops. I specialized in managing overburden using statistics based nonintuitive ordering mixed with an intuitive understanding of more esoteric factors, along with eBay, Craigslist, and swap meets. I also prevented a lot of bad orders for specialty service items. So this is my wheelhouse.

Not much has changed in 120 years. In the post I made after this one on the bicycle related stuff present in a single issue of The Iron Age from 1894 there was a chainless bike (that would have weighed a ton), a 19 pound "race weight" bike, aluminum rim wheels for clincher tires, a price listing for $100+ bikes that have sold "6000 units last season", a bike trainer that can be wheeled around for demonstration purposes and then used while still equipped, and a nonchalant ad from Pope Mfg., toting the established hegemony of Columbia which indeed was the Specialized brand of the era. There is even a suspension fork design mentioned... I think it was that one... I read another issue of The Iron Age on Archive from 1888, but it does not have pretty engravings everywhere. That may have been where the suspension was published.

In the blablabla from this Sears catalog, they also mention some marketing figures for their market share. This kind of advertising is always inflated and full of lies, but the conservative nature of only claiming 25% of tire sales in the market and the number of low end bikes at 400k (IIRC), hints that the market was absolutely massive. I already knew that from books about the era, but it is fun to point it out to others.

Cycling was the first really big sport and eclipsed everything else by a long shot. Humans were going faster than horses and most trains for short bursts. They were riding for days at a time in the velodrome to see how far a human could race for distance in days. Seven day long events were popular and common. Like Madison Square Garden was a velodrome.

Most of the velodromes that still exist in the USA are from this era. There is only one indoor velodrome in all of North America and it is from the '84 Olympics in Los Angeles. It is freaking awesome to go to. You can't even begin to walk up the turns because they are so steep. The next closest is in Mexico City... but my digression digresses...

Humans were fascinated by becoming so much more efficient with locomotion. The only form of locomotion that is more efficient in nature is bird flight.

The bicycle was the main catalyst for women's suffrage. The equality of marketing women's and men's bikes here was very novel. Prior to the bicycle, women rarely left the home without someone escorting them. It was mostly due to utility and purpose as travel was not easy or frivolous.

The carbide lamps mentioned here would have been awful. It is making acetylene using solid calcium carbide. So basically it is an ultra sooty flame like an oxyacetylene torch without the oxygen.

The railroad attachment was probably the most fun and dangerous accessory. There were not many abandoned lines back then. But there were not paved roads like today either. It was mostly dirt with some cobbles in the city.

Anyways that is my take in depth. The accessories and range are deeply familiar and cover most of what I would be stocking in a shop today.

[–] j4k3 3 points 1 day ago (2 children)

I like the emotions these convey. Each one clearly has a theme and tone when I see them in passing.

73
1892 hit hard (lemmy.world)
 

Joke aside, there are several cool fonts in this one from 1892:

https://archive.org/details/CentralBoston1892Specimen/page/n73/mode/2up

[–] j4k3 7 points 1 day ago

That is like $600 which is still a lot for a fixie.

 

I didn't think aluminum rims or clinchers were a thing all the way back then.

Here are all the rest of the cycling highlights of The Iron Age like chainless drive too.

stationary trainer:

https://archive.org/details/IronAgeVol54Jul121894/page/n95/mode/1up?view=theater

::: spoiler Bonus riding lawn mower:

95
patented rule (lemmy.world)
[–] j4k3 4 points 1 day ago (2 children)

Brakes were a rarity and more like a novelty for newfangled coaster wheel models only. They were not powerful enough to really stop a person as well as the fixies as we call them today. It may seem unintuitive but you can easily create back pressure on the pedals without a freewheeling mechanism in a hub. You use this back pressure to stop. You can also shift your weight around and make the rear wheel lock up and slide easily. The simplicity of this arrangement and the light weight are why the bicycle was possible so early. Basically as soon as a chain became manufacturable the safety cycles became a thing. Even before this, as soon as piano wire and rim technology allowed, people started making and riding the earliest forms of cycles with cranks attached directly to a wheel. The earliest cycle like device was made from two wooden cart wheels and a board in the middle that looked like a kid's running bike and it was only used for coasting down hills.

 

I'm not sure I can link like that to archived images from a catalog. Page 279 is missing from the scan. This is the whole catalog: https://archive.org/details/sears-roebuck-catalogue-111/page/n136/mode/1up?view=theater The bicycle section starts on page 137 of the slider.

For reference:

At this early point in the history of license plates in the United States of America, none of the 45 states, territories, or the District of Columbia, was issuing its own plates.[1][2][3][4] The State of New York remained the only state that required vehicle owners to register their automobiles. The system of using the owner's initials as the registration number, begun in 1901, remained in effect. This would change in 1903 when a number was assigned to each owner to display on their vehicle. Across the country the increases in the number of automobiles was being noticed, and there were many cities, like Chicago, that had already begun to require their owners to register their vehicles.[5][6]

https://en.wikipedia.org/wiki/Vehicle_registration_plates_of_the_United_States_for_1902

1902

  • February 12 – The 1st Conference of the International Woman Suffrage Alliance takes place in Washington, D.C..
  • March 7 – Second Boer War: Battle of Tweebosch – South African Boers win their last battle over the British Army, with the capture of a British general and 200 of his men.
  • March 10 – Clashes between police and Georgian workers led by Joseph Stalin leave 15 dead, 54 wounded, and 500 in prison.[1]
  • April 2 – The Electric Theatre, the first movie theater in the United States, opens in Los Angeles.
  • May 20 – Cuba gains independence from the United States.
  • July 2 – Philippine–American War ends.
  • August 22 – Theodore Roosevelt becomes the first American President to ride in an automobile, a Columbia Electric Victoria through Hartford, Connecticut.
  • August 22 – A 7.7 earthquake shakes the border between China and Kyrgyzstan killing 10,000 people.
  • September 1 – The first science fiction film, the silent A Trip to the Moon (Le Voyage dans La Lune), is premièred at the Théâtre Robert-Houdin in Paris, France, by actor/producer Georges Méliès, and proves an immediate success.[7]
  • November 16 – A newspaper cartoon depicting U.S. President "Teddy" Roosevelt refusing to shoot a bear cub inspires creation of the first teddy bear by Morris Michtom in New York City.
  • December 30 – Discovery Expedition: British explorers Scott, Shackleton and Wilson reach the furthest southern point reached thus far by man, south of 82°S.

https://en.wikipedia.org/wiki/1902

10
Grab bag deals (lemmy.world)
submitted 1 day ago by j4k3 to c/nocontextpics
 
[–] j4k3 2 points 1 day ago

Nice job of spotting the philosophical.

I say doctors should have a way to do this with patients to deterministically diagnose a person, (with consent of course). I'd do that in a heartbeat with my chronic issues.

 

This is a killer reference source and entry point for many applications and projects.

Capstan actuators = rope twisted around two drums for gear reduction, but with limited range of motion.

https://www.youtube.com/watch?v=MwIBTbumd1Q

https://github.com/aaedmusa/Capstan-Drive

 

Compliant tube based headphone pad idea I had while riding a bicycle two days ago. I got the thickness and dimensions dialed for printing and bending, but I either need to setup my old KP3 kingroon with a longer 2040 Z extrusion or print this in 2 pieces. Either way, the joint connection needs more than just the overlap and glue. TPE would probably be better too, although I have no idea what shore hardness this $10 clearance spool of TPU has. The sound quality seems a little tinny and I have no way to tell how loud it is externally, but it is just my first iteration that I can put around my ear and test. TPU is so slow to print and the moisture levels impact the qualities drastically. I actually like the texture and properties of wet TPU more than dry, but it is hard to get it just right. With the design's compliant bend, consistency is kinda important. Anyways, just another boring project. On the bright side, this seems cooler temperature wise when the TPU pad is against my ear.

I spent all day chasing custom logarithmic infill patterns that might incorporate a compliant bend but only learned about how not to do a thing like that in CAD.

view more: next ›