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Archive: https://archive.today/Dsg59

From the post:

>The age of steam is long gone, but there are few railfans who don’t have a soft spot for the old rolling kettles. So you’d best believe when [AeroKoi] talks about 3D printed train whistles, that’s steam whistles. Generally speaking, Diesels have horns. You would not expect printed plastic to hold up to live steam– but that’s why [AeroKoi] uses compressed air. Besides, it’s a lot easier to both justify and maintain an air compressor than a boiler in the shop. At least some hobbyists say it doesn’t make a huge difference with brass whistles, so it should be good enough for plastic. What’s interesting is that even with 120 PSI blasting through them, these multi-part prints held together and sounded amazing.

Archive: https://archive.today/Dsg59 From the post: >>The age of steam is long gone, but there are few railfans who don’t have a soft spot for the old rolling kettles. So you’d best believe when [AeroKoi] talks about 3D printed train whistles, that’s steam whistles. Generally speaking, Diesels have horns. You would not expect printed plastic to hold up to live steam– but that’s why [AeroKoi] uses compressed air. Besides, it’s a lot easier to both justify and maintain an air compressor than a boiler in the shop. At least some hobbyists say it doesn’t make a huge difference with brass whistles, so it should be good enough for plastic. What’s interesting is that even with 120 PSI blasting through them, these multi-part prints held together and sounded amazing.
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[–] • 1 pt

Get an electric valve and a compressed airtank for paintball. Wire it up with a little remote or a relay board so it can be a 1-press to do 1-2-3-4, etc seconds or a 2nd button to just hold it down.

[–] • 0 pt

I suspect that a paintball tank would be good for about 3 seconds of blast. I think I need a small onboard 12v compressor and about a 2 or 3 gallon air tank. I like the electric valve with a remote idea though. Way better than a handle on my dash!!

[–] • 1 pt

That could work. A proper paintball tank could last a while but when using a paintball gun it is very short bursts.

[–] • 1 pt

I like the onboard compressor, I've wanted to get one anyway. It would come in handy for work once in awhile too.