This is content marketing executed perfectly :) Reading it, I learned something new and interesting and they had an opportunity to show off one of their differentiators against the competition (low leakage flow due to tighter tolerances) and then at the end they casually mention the new product that has just opened for pre-orders.

I love Noctua, and just wish they'd branch out from PCs and build more types of fans. Our lives are filled with so much irritating noise from noisy fans. Air conditioners, kitchen extractors, hair dryers, box fans, air purifiers, vacuum cleaners, leaf blowers, car climate control & radiator fans, just to name a few. I'd happily pay a premium for quieter things.

I enjoyed reading this. As others have said, it's both interesting and good marketing communication.

I'm a dev and for the last year I've been working for a company that manufactures pretty complex and advanced machines. I work with proper engineers - electronic, electrical, control, mechanical - and actual scientists. One of the things I've come to appreciate from this is the hidden depts of detail and complexity in so many aspects of the objects that surround us. People work hard on small details that hide in the background but are vital to making things work. And there's often code in everything, all the way down.

And now I can add plastic injection moulding to that. The rabbit hole goes very deep.

Edit to add:

My dad worked forty-plus years as an engineering pattern maker. He made, by hand, the high-tolerance wooden "negatives" that were used to form moulds made from sand and resin. The moulds were used to cast parts for industrial valves: molten brass and gunmetal was poured into them, in a foundry, and left to cool. I think he would have deeply appreciated what this article was saying about craft and engineering and patience.

> we have implemented a tip clearance of only 0.5mm (120mm models) or 0.7mm (140mm models) in order to minimise leak flows through the gap between impeller and frame.

> Achieving such small tip clearances is essentially at the absolute limit of what injection moulding can consistently reproduce

For folks thinking about Lego tolerances [1] that are an order of magnitude tighter at 10 microns or 0.01 mm, it turns out that the largest Lego moving parts are a turntable at 50mm or so, and rotate at an rpm an order of magnitude slower (100 or so rpm vs 1200 rpm), so these tight clearances (not tolerances [2]) are quite tricky to achieve, and more importantly, maintain over the life of the product, apparently.

[1] https://en.wikipedia.org/wiki/Lego?#Design

[2] changed 'tolerances' to 'clearances' per note below

I like the brown ones. Everything is black, it's dumb, and I'm happy to have any contrast.

Don't Noctua fans generally go in builds made by people who like silence?

In which case they'd have silent cases with no glass panes, because those are thinner and a possible source of vibration. They may even glue (opaque) sound absorbing material to the inside of their cases.

In which case, who cares what colour the fans are?

Noctua is one of few companies that has not broken my trust (yet). They promise me a really good fan, they're ten toes in on the promise and they have yet to fail to deliver.

I really miss that they don't release white versions. In my all-white case I just can't have Noctua. The brown ones I think are extremely ugly and the black ones stand out too much.

White doesn't really look bad in any case (except perhaps a full black one). The brown is very identifiable but that's only really a point if you desire to flaunt your expensive fans. Because it will stand out too much in almost any build. I honestly don't care about that, and for a fan this price I shouldn't have to put up with hidden advertising.

But I have BeQuiet Silent Wings and they're not bad. Quietness isn't something I'm optimising for anyway as I only use my desktop for gaming and when I do I wear headphones anyway. I do want to optimise more for pressure (as I have air filters) but these fans are no worse than Noctua.

This is a really nice write up. The reason itself — why the delay — is totally within my own speculation, but the sheer quality of the writing dragged me through the whole article. That is something.

I think this shows how Noctua value their customers, including myself. I really love how they are nice to their customers — both their products and services — especially because experience like this is getting more and more scarce. I really appreciate their work.

If you need that kind of precision, yes.

But I don't think they really need that.

Anyone else getting the optical illusion of the fans spinning in your peripheral vision while reading the top paragraphs?

Explains why LEGO had a leg up for multiple years. You can’t just change the color pigments and hope the parts fit in the same way. Of course these times are over and other brick manufacturers caught up or overtook Lego.

I hope they're keeping all that data to be able to feed to ML and improve their FEA models, and to perhaps advance molding tech for everyone.

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I recently built a home server and used Noctua fans for the first time. I absolutely love how quiet they are. If I didn't know the room had my server in it and was running, I wouldn't even notice the very quiet sound of the fans.

I am running them at about 800rpm and the CPU is usually between 33~37 degrees.

When I rebuild my main PC, I will surely go with them again.

I wonder why they can't just get the last half a mm of accuracy by just grinding down the tips

This is a delightful post, I'll be sticky with the classic colours letting them proudly display what they are

My layman question is why plastic cant be painted? Case temperatures are not that high and there are no plastic parts rubbbing.

I don't buy it. It's just a plastic PC fan with some bearings which does not cost that much

Why would someone want a beige or brown fan? If it is that complicated why not only make black ones?

I always expected that black was the easiest color, since you just add enough pigment to wipe out any colors from other materials. Are they implying that that brown color is the natural look of the materials they used, so the simplest to engineer?

Blue. Make blue fans.

I think I have 20 or so Noctua fans from 80 to 200 mm from 1-8 years old, haven't had a bearing or motor failure yet. Cross fingers.

Interesting.

I'm glad companies like Noctua exist that put so much thought and care into their products. I don't even mind being advertisted to when that's the case.

Reading about this, just makes me wish I has good 3d scan of their impellers to see how a simple 3d printer will deal with such mythical precision.

Somewhat unrelated anecdotal praise of Noctua: due to various life factors, I hadn't built a PC since maybe 2010 or thereabouts - something I did relatively often before then and had quite a bit of experience with. Then a few months ago I finally did it again. Forgetting about the absurdity of the RAM situation, I gotta say my biggest surprise was cooling. I wanted a quiet media center machine. The internet and friends kept recommending Noctua. While researching, I got a bit of a cult vibe, and their prices seemed a bit stiff. But I went for it, with some hesitation.

Goddamn was I wrong! Their CPU coolers are the most well-designed, thoughtfully planned, amazingly performing consumer product I've seen in a while. 10/10, highly recommend! I'll use them for all PC cooling needs going forward.

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I sometimes wonder whether they have an culture that overengineers tbh.

The thoroughness & mindset is certainly appreciated, but you can also overdo it - engineer it beyond what the consumers use case requires.