Lgb 2-10-2 Changing 2 Chuffs To 4 Chuffs.
- Thread starter Phil
- Start date
PaulRhB
This Way Up
Read cv54, probably will be 2.
Add 64 to that value and write it to cv 54.
So if it reads 2 then write 66 to cv54
The bits are a bit confusing but think of them as sort of functions 1-7, you choose the functions you want active and add the numbers together to get the value to program the cv to.
Add 64 to that value and write it to cv 54.
So if it reads 2 then write 66 to cv54
The bits are a bit confusing but think of them as sort of functions 1-7, you choose the functions you want active and add the numbers together to get the value to program the cv to.
Madman
Registered
Digressing slightly, it never bothered me that some factory sound systems had only two chuffs per wheel revolution. That is until about a year ago when I educated myself from Chuff Moron to Advanced Chuff Moron. Now when I see videos of steam locos, model or real, I look and listen for the correct number of chuffs. Obviously prototypes will pass the test. However some models, including some expensive Lionel "O" scale miss the mark by not just alittle bit.
stockers
Trains, aircraft, models, walking, beer, travel
That is very true Dan but in model terms I think we set the rate to best suit our ears. Have to say, in my opinion, a rate of two per rev sounds about right. Four can just blurr at all but the lowest speeds and less than two sounds slow. One of my recent purchases was chuffing at about 1 and a quarter chuffs per rev (CPR!) and it looked and sounded wrong.
One of the delights of this hobby - our models suit us, and that's the main thing.
One of the delights of this hobby - our models suit us, and that's the main thing.
The other thing that is worthwhile is to limit Max Speed. You can do this by reducing CV5 to around 100, this give a Max Scale Speed in the order of 40-50 KPH. Much closer to what the real thing would do.
JonD
JonD
Frank Gallagher
Well matured physically if not mentally
If the chuffs blur into one sound then your probably driving too fast IMHO
Maby a decent video is spoilt because of excess speed
Maby a decent video is spoilt because of excess speed
Yes but a Castle or King is quite likely running at 60mph plus. Also they are both 4 cylinder locomotives thus 8 beats to the revolution. A harz 2-10-2 (2 cylinders only) is likely to be doing not much more than 25-30kph well slow enough to hear the individual chuffs, so setting to 4 chuffs with a gentle amble is much mire like it.
JonD
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Neil Robinson
Registered
Valid points but don't forget that narrow gauge locos tend to have much smaller driving wheels than their main line express cousins.
The footplate of a Ffestiniog "Lady", when running uphill at 20mph with eight bogie coaches, can be quite noisy!
Rhos Helyg Loco Works
Registered
Errrr... no. Kings and Castles have 4 beats per revolution as their cranks were set at 90 degrees to each other, which means that the cylinders operate in pairs with two under compression, two exhausting, etc., at the same time. The only 8 beats per rev UK loco that I know of is the SR Lord Nelson, which has cranks set at 135 degrees.
Various 3-cylinder locos (Jubilees, for example) have 6 beats per revolution.
Unless it only had a single cylinder, and with all of the problems that creates, I think it is impossible to build a working steam loco with only two beats per revolution.
So that will be 4 beats and 4 silent ones then, my argument still holds that a NG loco at a smaller speed will always sound better with the Decoder set to 4 beats per revolution at a sensible speed, not something like 60mph that one often sees LGB NG Locomotives racing round at.
JonD