Irish Class 121/141/181 Projects & Functions

Wheeltappers have developed the Irish class 121 sound files to be as prototypical as possible.
We do however appreciate that this will not satisfy everyones needs.

The Irish class 121 decoders are on ESU version 5 decoders only as this decoder only supports the extra flexibility needed to control the lighting functions, consist mode running and ‘Load’ mode.

For those that are not using sound but just DCC we have developed a none sound decoder that will control the motor and lights.
A full list of functions are available on our website on the Irish class 121 page under sound and none sound functions.

The none sound decoder can also be used if running a class 121 in consist (double header) mode matched with a locomotive fitted with a sound decoder, this decoder is forward reversed and F24 must be on if running as a consist double header.

Features of the class 121 sound file include, Drive hold, Normal and emergency braking, Kadee shuffle uncoupling, Wagon buffer clash, Station announcements, Shunting, train mode and parking lights, Load mode and dual running with a none sound decoder. (F24 must be on)

A new feature we are adding is the ‘Load’ feature.
This feature simulates the driving and braking of the locomotive under load.
The default setting is for a medium train of around 4 coaches or short freight train.
By selecting Function 17 (F17) you can change to a light engine mode.
This increases the acceleration as the loco has no load and alters the deceleration and stopping distances when the brakes are applied with Function 5 or 6 (F5 & F6) due to no load.
By selecting Function 18 (F18) the driving characteristics are changed to a heavy load train of more than 4 coaches or a long freight train.
This will over ride F17 if on and alter the acceleration and deceleration of the train and also increase the braking distance when stopping.

To complement the new class 121’s we are upgrading our class 141 and 181 V5 sound files to incorporate these new features with matching function buttons.
These projects are well over due an upgrade and as the models are getting on some not all of the lighting features are as up to date as some of the newer models available so some manual switching of the lights will be needed to suit.

An upgrade of your current V5 decoders is available as a free download to those that have a programmer or by post with a small charge for the return postage.
Please contact us first for details.

A sound with none sound package is available, please check our web site.

We are always on the lookout for ideas as to what to add to our sound decoders and are always adding new locomotives to our list.
From the Wheeltappers DCC sounds team.www.wheeltappersdccsounds.co.uk
email: wheeltappersdccsounds@btinternet.com


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