Chuffs per wheel revolution

If the locomotive has two cylinders, each will chuff twice, for a total of 4 chuffs per revolution.

The engine should be 4 chuffs per rev.

It can be programmed via the EOB it has, the steps are in the owners manual (did a quick google search, couldn't find it)

If no one can get you an answer, I will get you photos of the page to set the chuff rate by Monday.

 The Atlas 0-6-0 I'm pretty sure came with EOB. Prototypically it should have 4 chuffs. EOB has selectable chuffs. I don't know the sequence at the moment but I have the manuals. You basically program the engine to chuff once at the same point when doing your initial setup doing an upgrade. Your basically just throwing numbers at it till you narrow it down to exactly one per revolution. A few button pushes of the remote changes it to 4. It's reading the stripes on the flywheel much like an MTH. Atlas may have already done this for you. They may be shipped these with one chuff.

 From the EOB manual. ENG+##+AUX1+AUX1+5.        If I'm reading it right. Each time you press 5 you will hear the whistle blow. One blow for one , press again and you should hear 2, press again and you should hear 4. I'm guessing then you just leave it alone. It mentions you can change the chuffs while the engine is moving.

Cape Cod Northern posted:

I have a newly acquired Atlas USRA 0-6-0 (brand new) that runs with 1 chuff per wheel revolution. Is that correct for this type of engine (both prototypical and TMCC feature wise) ? Nowhere is it noted that I can change the chuff rate as I can on my 3rd Rail Berkshire.

You have a steam engine?  There is a God?

You could also just look at the complete TAS EOB manual: TAS Installation Instructions for EOB Complete.pdf

This is from the TMCC/LEGACY REFERENCE MATERIALS & MANUALS thread that has lots of useful manuals.

If you see stripes on the flywheel, it has EOB and can be programmed to 4 chuffs per revolution.

If it doesn't have stripes on the flywheel it probably does not have EOB.

Maybe GRJ's chuff trigger will fit. It requires a source of 5 volts DC.

The replies came from guys I believe I have all met personally and led me to successfully program 4 chuffs per rev into the engine. Followed John's link to the EOB manual and found the program there. I even picked the correct random number of timing tape marks to count on the first try (350). Pulled the engine and tender off of the paint prep bench (relettering it for the Maine Central) powered it up and did the reprogram. No mention of this feature in the Atlas owner's manual. What do you expect from a "diesel guy". By the way, Gary, I now own two steam engines!

Two, then three, and so on.  Yes it is a sickness

 Al, do you have the Lionel Legacy Mikado on order ? It will already come painted Maine Central with 4 chuffs. You'll need some road power once your switcher builds a train.