Model Railways / Model Railroads

Friday, July 13, 2018   4:07 PM

Improving Tomix "Second Generation" mechanisms

See Improving Tomix "Second Generation" mechanisms (part 2) for updated advice on this issue

Older Tomix N gauge trains are infamous for their "spring worm" drive mechanism, whereby the motor is connected to the bogie gear tower via a long spring-like metal spiral. While presumably cheap to manufacturer, it does result in somewhat noisy operation, so from the late 1980s (IIRC) Tomix gradually phased this out in favour of a more conventional mechanism with cardan shafts connecting to a worm gear on top of the bogie gear tower. This second generation does however seem to have retained the older electrical pickup mechanism, with copper forms pressing down on the axles inside the wheels (similar to what Lima did, e.g. on the Class 31), which is more reliable than wiper-based pickups but not as elegant as current axle pinpoint pickups.

Anyway, while this second generation of Tomix mechanisms is basically robust and reliable, some can be surprisingly noisy. I'm not sure whether that was the case when they were new, or whether something's deteriorated with age, but certainly annoying on otherwise decent models.

After some investigation it seems a common issue is that the worm gear case is slightly loose and prone to vibrating against the chassis. This can be mitigated by applying strips of electrical tape to hold it in place, as seen here on an older Tomix 115-1000 series:

Tomix 115 Series with modifications to the mechanism

While it doesn't bring the mechanism up to contemporary standards, it does change the running qualities from "annoyingly rattly" to "decent runner".


Tuesday, July 10, 2018  10:45 PM

"Nine Scale World" maintenance guides

The bi-monthly magazine "N" (エヌ) by Ikaros Publications has, for the past couple of years (from volume 77 onwards), been publishing a fairly regular feature detailing how to clean up/improve older Japanese N gauge models. This was originally called "ジャンク活用術" (janku katsuyou-jitsu, "Making use of older models") but in recent issues it's been titled "Re Model". (Note: "ジャンク"/junk generally refers to second hand models which are basically not in as-new tip-top condition, typically missing packaging, accessories etc., or have some minor repairable damage; it can refer to genuine spares-or-repairs candidates but 95% ot the time something labelled as "junk" will be perfectly usable).

This is an overview of the available articles for reference; articles from volume 100 and earlier are taken from a listing in that edition which contains an overview of articles in all 100 magazines to date.

  Volume Page Title (original) Title (translated
* 108 42 TOMIX DD51 (旧製品) Tomix DD51 (old version)
* 100 42 TOMIX 113系 Tomix 113 series
  99 42 中村精密 蒸気機関車 Nakamura Seimitsu steam locomotive(s)
* 97 46 しなのマイクロ国鉄事業車編 Shinano Micro JNR departmental vehicles
* 96 90 TOMIX 国鉄キハ02形 Tomix JNR Kiha 02 series railcars
* 95 52 KATO 103系(一般型) Kato 103 series (original Kato version)
* 94 90 KATO 24系寝台特急「あけぼの・日本海」 Kato 24 series sleeper "Akebono/Nikonkai"
* 93 90 宮沢模型 381系パノラマしなの Miyazawa Mokei 381 series "Panorama Shinano"
* 92 90 エンドウ 103系・73系 Endou 103 series / 73 series
* 91 90 KATO 165系 Kato 165 Series
  90 90 マイクロエース 485系 MicroAce 485 Series
  89 90 KATO マイテ49 Kato maite 49 (saloon end car)
  88 90 KATO EF65ゆうゆうサロン Kato EF65 "Yuu-yuu Saloon"
* 87 90 エンドウ都営地下鉄 10-100形 Endou Toei Chikatetsu 10-100 Series
* 86 90 KATO 103系低運転台 Kato 103 series (low cab version)
  85 90 KATO クモニ143 Kato kumoni 143
  84 90 KATO キハ40・キハ58 Kato kiha 40 / kiha 58
  83 90 TOMIX サロ481 Tomix saro 481
  82 90 エンドウ 京王5000系 Endou Keio 5000 series
  81 88 KATO 205系・103系 Kato 205 series / 103 series
  80 88 KATO 189系 Kato 189 series
  79 88 KATO 189系 Kato 189 series
  78 96 KATO コキ10000 Kato koki 10000 (container wagon)
  77 90 宮沢模型 165系「なのはな」 Miyazawa Mokei 165 series "Nanohana"

(volumes denoted with an asterisk are in my personal possession)

Back in the increasingly dim and distant (well for me at least) 1980s, when diesels were blue and trains were still done properly (loco at one end hauling coaches or wagons), the Class 27s were very much a far and distant (from my Midlands perspective) Scottish class, rarely if ever sighted.

However as with many of the early "pilot scheme" classes, they started off life elsewhere, with quite a few being allocated to Cricklewood and Leicester during the 1960s. Though I've always been aware of that, they still seemed utterly unconnected with my main region of interest, the West Midlands, until I came across entirely by coinicidence a photograph of one topping the Lickey Bank at the head of a freight train.

Interest piqued, further research revealed more evidence of the class in the Birmingham area (though an awful lot of hits were false positives triggered by the the "B" in "BRCW", not the location of the photograph or sighting) - Quite a few seem to have made it west and south of the city. Following is a list of online references I've found, in rough chronological order.

Also of interest is this thread on RMweb: Leicester class 27's

Monday, April 16, 2018   5:27 PM

Lists of N scale (N gauge) models

One question which frequently comes up in various N scale forums and groups is "is there a list of all N gauge models ever made?"

To which the answer is "no", but there are a number of sites providing comprehensive lists of models for particular manufacturers, subject areas and other information such as scans of old catalogues. This is a (incomplete and work-in-progress) "meta" list of such sites.

Global/multinational lists

British outline models

German outline models

  • MoBaDaten.Info - wiki-based database of mostly German models, multiple scales
  • Modellbau-Wiki - wiki-based database of mostly German models, multiple scales
  • - mainly German models, includes user reviews
  • - mainly German models, some Spanish/Italian; seems not to be updated much

Japanese outline models

North American outline models

  • - North American N scale locomotive, passenger cars and wagons

By manufacturer

Friday, March 10, 2017  11:26 PM

Replacing Arnold couplings with Kato ones

I recently aqcuired a rake of Kato Taki 1000 oil tank wagons (set 10-1167) to go with my EH-200, and while they're perfectly decent wagons the default Arnold couples really do stand out and look clunkier than usual. Normally I'm not too bothered by Arnold couplings and can "unsee" them, but these had to go - replaced by the Kato coupler (part number 11-707). Mildly fiddly to assemble and put in place, but they make a huge difference:

Kato Taki 1000s with Kato coupler

Saturday, January 14, 2017   1:50 AM

Dismantling a Tomix E1 power car (original tooling)

I recently acquired this very fine Tomix E1 Shinkansen, albeit as a 3 car set as part of a trainset pack ("SD Max 90010").

Tomix E1 Shinkansen (original livery)

Despite being around 20 years old, the set was in excellent condition - except one of the couplings on the power car was broken, and as it's an integral part of the bogie, not simple to repair.

Fortunately Tomix provide replacement bogies (part number 0494), so I hoped it would be a matter of removing the original bogie and installing the new one. Not being sure how the bogies were mounted I decided to strip it down as far as possible.

Step 1: remove body - it unclips fairly easily.

Step 1 - remove body

Step 2: remove grey undercarriage cover:

Step 2 - remove undercarriage

Step 3: remove interior/seating unit

Step 3 - remove interior/seating

This turned out not to be necessary, but we see the chassis is covered by a membrane strip (similar to MicroAce units) to protect the motor and electrically inslulate the monobloc chassis.

Having got this far, it became apparent that being a monobloc chassis, the bogies are designed to clip in place, and are held in position by the circular plastic "lip" at the top of the bogie tower. They can be removed with a bit of careful twiddling.

So far so good, but it turned out the the replacement bogie (lower left in the above picture) is of a subtly different design, presumably for a newer version of the tooling for the Tomix E1, and while it could be coerced into place, it didn't really fit and was clearly not suitable as an as-is replacement.

All was not lost, however - a bit of work with some nippers and a pin vise enabled me to bodge the new bogie's coupling attachment onto the old one, which looks ugly but isn't visible when the train is coupled.

Dan of The Farish Shed has, following a suggestion from my humble self, very kindly created a servicing guide for the Farish Poole-era class 25 (and class 33), an example of which I possess in a non-running state. I'm a bit stuck for time at the moment but I fully intend making use of it in the not too distant future. Meanwhile here's the locomotive in question:


Tuesday, December 29, 2015  10:05 PM

New website for Graham Farish Poole-era products

According to this post on the N-Gauge Forum, the site is currently not available due to hosting issues, and it's unclear when it will become available again.

Via the N Gauge Forum I was pleased to hear about a new website dedicated to "Poole-era" Graham Farish products, It's still very much work-in-progress but contains some useful background history on the company, which was based in the Dorset town of Poole until its takeover by Bachmann around 2001. While many of the Poole-era models were not the most detailed or reliable, they did represent a major part of the British N gauge market for many years and have a certain appeal for many.

As I have an interest in "historical" N gauge models, I have acquired a couple from the Poole era and hope to restore them to working order, and this site should certainly be very useful. Of particular interest to owners of past and more recent Farish models is the section on split gears, which helpfully lists useful sources of parts.