Of course the other reason is that the engineer calculated how long and how thin he needs to make the tungsten for a 110v (or 230v) bulb, and then started to wonder how on earth he could cheaply get all that length inside such a small bulb!! The (best) answer: a double helix!!
Do you know that they could make incandescent light bulbs that would last longer than what was commercially available? It was because of a regulation that limited the lifespan of all the light bulbs back then to only 1000 hours. A regulation proposed by the Phoebus cartel - Philips, Osram, Tungsram, General Electric, Associated Electrical Industries, and several other companies. It was all planned obsolescence.
@@hoppinggnomethe4154 Yes, I did know that. If I remember correctly, G.E. were actually fined for being in the cartel. Nowadays they just make things slow down with software updates. I was pretty upset when Amazon cut off my Kindle after 10 years, with no other reason than “it was too old!”. I’m still using it but not for Amazon books anymore!
Every bulb in my house has been replaced with CFLs or LEDs, except for three. In my hallway there are two tungsten filament bulbs have been in use for over ten years. Yes, ten years, I have photos of me from 2012 with my cat with the same bulbs hanging there. Outside there is a 100W tungsten bulb that has been there since my younger brother bought it across the road, as a teenager, he's now in his 30s. It's really incredible!
Thanks Bill! I really like these short videos for fast knowledge of things. Can't wait for one of your longer videos too. Two of my favorite videos you did were the aluminum can and the ball point pen. Also the pull tab! They were so good! 🎉
Your shorts are impressive for how concise they are, which is impressive when "shorts" already implies brevity. I've been a fan for a while (and not long enough), so I'm glad to see you uploading more often even if it is in short form, especially to this standard.
Bill is an excellent teacher because he's passionate about learning. Learning something new is exciting to him and the only thing that's more exciting is to share that newfound understanding with another. Keep up the great work Bill. I know I speak for many of your followers when I say, we get you.
I was looking for this one. Unfortunately it's a necessary evil. Otherwise the company would go out of business before you get a replacement. End up scouring eBay looking for a classic overpriced piece of tech lol
I love your content, but please call it a coiled coil, instead of a double helix. People are taught that DNA is a double helix, and their understanding is not helped by conflicting terminologies.
Thank you, I went down a 10 minute research rabbit hole wondering if my core understanding of the concept was wrong. I really respect bill. But everyone makes mistakes I guess. Best to correct mistakes like this as soon and as clearly as possible.
I love the slogan at the end of these shorts. So many people think the sort of fanciful creativity of art and fashion and storytelling is the "real" creativity, but that's a creativity of little consequence. What is lost if the choice to make Darth Vader Luke's father is the wrong choice? Engineers create solutions when reality is on the line. In practical matters that can be highly consequential. Where choice of material changes the lifespan of a bridge or a building, where the shape of a hinge keeps a product from failing, where the topology of a panel can redirect a RADAR or deflect a bullet. Long live the creative engineer, we owe them everything.
@@engineerguyvideoseems like this account is being run by someone other than Bill. Perhaps his son? Misspellings aside, a unit miscalculation is a crucial mistake for an engineer to make. If you're helping him back into the internet, that's good. We appreciate the new content. But if that content is wrong, misleading, or factually incorrect - it is the exact opposite of what Bill originally made this channel to represent.
Not what I'd initially think of, but is obvious once mentioned . The evaporating tungsten is more likely to hit the filament when coiled, increasing life.
I doubt the last claim: that the helix would increase the lifetime of the double helix wire (compared with a straight wire of same length and diameter). I think when a tungsten atom evaporates, it's very unlikely to condense at a place where it would extend the lifetime. . . . But that's different for halogen lamps: the evaporated tungsten reacts with the halogen gas but splits up again at hotter parts of the wire, which is where the tungsten needs to be thicker. Therefore, halogen lamps can be operated at higher temperatures and give more light per consumed energy.
I'm buying your book. I think anyone creative should consider engineering. It gets a bad rap as being boring, and no doubt there are boring corners of engineering. I'm a design engineer in a high tech industry. Every day I get to invent stuff. We rapid prototype with maths on paper, move to Excel, move to Fea/Cfd, move to prototype and experiment and then move to production over about 4 or 5 weeks. It's so much bloody fun. People don't know what they are missing doing "creative" jobs.
Odd, school didnt sap out any creativity from me, what could be the reason? Most of my peers have never been creative, and aren't creative, atleast what I have seen, the ones who were creative, are still creative. Ill wait for even tiny effort put into thinking of response, if there is none, I can see the reason behind problems.
@@symix.probably cuz the way they teach mostly is really fucked stand up and talk read a book take a test do a sheet of work over and over again for years it just wont work for some
An engineer would say it is made this way as it makes the most amount of light with the least amount of material and power. A salesman would say it is made this way as it lasts longer.
i thought life has to do with glass and the vacuum inside it and double helix has to do with the length of the filament because more length means more resistance which means more brightness
😂😂😂bro its the scale of the cross section of the tungsten to its gas volume which sustains the filament at such temperature...its just insight!..i am the insight guy 🤣
Take a look at graph. By reducing voltage by 10% lamp's life increases 4-fold !!! Make your own conclusions (from the point of view of the lamp manufacturers).
@@tohopes I get that, easy mistake to press the division instead of the multiplication on the calculator, but any engineer should know what 20 inches look like and what almost 8cm are, that shouldn't have gone into a video that promotes engineering
