What is that knocking (sounds like metal against metal) that decoders are trying to simulate when a steam loco starts up or idles?
Gary
Without hearing the exact sound you are speaking of, I'm going to guess the air compressors. Kind of a Tom-Tom sound? The sound resonates in the air reservoirs.
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Just found an MP3 via google search for steam loco sounds. It appears to be the steam piston sound.
gdelmoroWhat is that knocking (sounds like metal against metal) that decoders are trying to simulate when a steam loco starts up or idles?
I'm guessing you mean this at 0:25
http://mrr.trains.com/sitecore/content/home/articles/2017/06/video-athearn-genesis-ho-scale-class-z-8-challenger
Henry
COB Potomac & Northern
Shenandoah Valley
gdelmoro What is that knocking (sounds like metal against metal) that decoders are trying to simulate when a steam loco starts up or idles?
That is the air compressors which provide the air pressure for the brakes. They are steam driven and come on automaticly when air pressure drops.
Large modern steamers often had two compound pumps, and they do make a loud "knocking" sound.
If you go someplace like the Strasburg Railroad where you can watch an operating steam loco up close, you will learn a lot about the sounds and functions of the various parts.
https://www.bing.com/images/search?view=detailV2&ccid=L51mz94W&id=08BC08F7D997856DBCB6A6AFEF2C73155012422E&thid=OIP.L51mz94WRZyp6HHgIShnbAEsDI&q=steam+loco+air+pump&simid=608036374169651484&selectedIndex=16
Sheldon
http://cs.trains.com/mrr/f/13/t/263416.aspx
Cheers, the Bear.
"One difference between pessimists and optimists is that while pessimists are more often right, optimists have far more fun."
YES need to find a CV to lower it.
gdelmoro YES need to find a CV to lower it.
Well I'm not the DCC sound expert, but I'm not sure you will find a seperate volume control CV for that sound. In real life they are rather loud, I have watch people be seriously startled when standing next to the loco at Strasburg and the air pump starts up.
ATLANTIC CENTRAL Well I'm not the DCC sound expert, but I'm not sure you will find a seperate volume control CV for that sound.
Well I'm not the DCC sound expert, but I'm not sure you will find a seperate volume control CV for that sound.
Tsunami 2 has a separate volume control for the air pump: CV 132
Ed
7j43kTsunami 2 has a separate volume control for the air pump: CV 132
And Broadway Limited's Paragon 2 and 3 is CV 143. 0-255 range, 128 is default.
http://www.broadway-limited.com/support/manuals/Paragon%203%20Steam%20manual.pdf
Page NINE.
Does the OP know what kind of decoder we are looking for???
ATLANTIC CENTRAL gdelmoro YES need to find a CV to lower it. Well I'm not the DCC sound expert, but I'm not sure you will find a seperate volume control CV for that sound. In real life they are rather loud, I have watch people be seriously startled when standing next to the loco at Strasburg and the air pump starts up. Sheldon
LOL I said the exact same thing in the Electronics section without having seen this - about seeing people startled at Strasburg.
--Randy
Modeling the Reading Railroad in the 1950's
Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.
Well that's a good question Ed, It's a BLI Paragon 2 Light Mikado. I don't really know what decoder they use. I think they used to use QSI but i heard that recently they have been making their own. My loco is a 2016.
Now that the discussion is about decoders and not prototypes i moved it to DCC & Electronics
Paragon 2 and Paragon 3 are BLI's own decoders. Plain Paragon is QSI.
-Randy