Fitting DCC Sound to a Dapol Class 22




Modllers were blessed with the release of the Dapol class 22 diesel hydraulic locomotive at the end of 2011.
Many reviews of this model have been written, suffice to say that this really is a superb model.

In this article, we fit DCC sound to the model.


DCC Readiness

This model must be one of the first in the UK market space which is truly 'DCC Ready' and truly 'Sound Ready'. The model is particularly notable in that it has proper provision for a decent sized speaker - the sealed bass-reflex from DCC Supplies being recommended - and it accepts a 21 pin decoder with no wiring necessary.
In this article, we fit a Loksound V4.
It should be noted that this particular model is one of the first releases by Dapol which had the incorrectly manufactured motherboard PCB and therefore, requires the decoder to be fitted 'upside down'. This is a problem which Dapol have now fixed.


Prototype Sound

Fitting sound to this model was always going to be a compromise since the prototype is no longer extant and there appear to be no recordings of the prototype available. Certainly no modern high quality digital recordings are available.

The production class 22 locos (of which D6331 was one) had a single NBL/MAN L12V18/21B power plant fitted. Two of exactly the same power plant were fitted to the class 43 'Warship' locomotives.
We therefore made the assumption that a class 22 must have sounded similar to, if not the same as, a class 43 'Warship' with only one engine running. The 'baby Warship' nickname given to class 22's was applicable for a reason!

There are no class 43 Warships extant, however, we understand that a group at Bury on the East Lancashire railway have obtained a class 43 MAN engine for use in their class 42 Warship 'Onslaught'. When this engine is fitted and run up, it may become possible to obtain recordings of a real class 22 engine, however, until that time, we made the compromise of selecting the Howes class 42 warship sound package as a basis for modifications.

Bryan at Howes kindly produced a special 'one-off' version of their class 42 sound package for us with single engine and a few other modifications.


Videos

The following videos show the Dapol class 22 running on 'Ashprington Road' with the special Howes sound packaged fitted.

D6331 is checked on the approach signal to Ashprington Road, hauling a London-bound milk train.


D6331 passes through Ashprington Road with a London-bound milk train.


D6331 approaches Ashprington Road with a Plymouth-bound passenger train diverted from the LSWR North Devon line.


D6331 leaves Ashprington Road with a Plymouth-bound passenger train diverted from the LSWR North Devon line.


D6331 leaves Ashprington Road with a Plymouth-bound passenger train diverted from the LSWR North Devon line.


D6331 starts up and leaves Ashprington Road with a Plymouth-bound passenger train diverted from the LSWR North Devon line.


D6331 leaves Ashprington Road with a London-bound milk train.


Graham Plowman (17/05/2012)


ESU Loksound Decoder and sound supplied by:
Howes Models Logo

Speaker supplied by:
DCC Supplies Logo

Locomotive supplied by:
Hattons Logo


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