Shortening Kato chassis

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rue_d_etropal
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Shortening Kato chassis

Postby rue_d_etropal » Thu Jun 30, 2011 8:25 am

I am sure I have seen something about shortening loco chassis possibly the Kato n gauge ones. Wondering how short the Kato 4 wheel chassis can be cut down to without falling apart :roll:
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Postby demaine22 » Thu Jun 30, 2011 9:05 am

Sorry if this is wrong...maybe this is the answer?

http://forum.gn15.info/viewtopic.php?t= ... 2bc013f28a
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Postby Steve Bennett » Thu Jun 30, 2011 12:16 pm

Yes, thats right, the shortest you can go with the Kato is 46mm, any shorter would take out the screws that hold it together :)
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Postby Simon Andrews » Thu Jun 30, 2011 1:41 pm

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Postby rue_d_etropal » Thu Jun 30, 2011 3:59 pm

Thought it might not go short enough. There are some shorter chassis available but not only do the cost more, but the motor is higher. It is actually fot one of Tebee's small )OO9 locos. Wanted something to run round 1/6th scale model of 1/12th scal9or 7/8th in) model.
Simon Dawson
(Simon D.),
Narrow gauge Francophile interested in 1m, 60cm,50cm , 40cm and smaller gauges . Build in scales from 1/6th to 1/24th. Also 1/32nd and 1/35th using 16.5mm track to represent 50cm and 60cm gauges.
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Postby Steve Bennett » Thu Jun 30, 2011 4:56 pm

How small do you want Simon :?:
The smallest around currently is n the Kato Portram
http://cgi.ebay.co.uk/Tram-PORTRAM-TLR0 ... 2eb5ef265c
Not cheap but there are 2 powered bogies in them.
Here is a link to taking one apart and you can see how tiny they are
http://murquick-mine.co.uk/lister/lister.php#A12
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Postby rue_d_etropal » Thu Jun 30, 2011 9:53 pm

that looks better, Steve. but the price is a bit high. I wonder if Kato will do this chassis as a spare.
Maximum length is about 40mm. I could just about fit the other Kato chassis but have the screws just sticking a bit out each end. Not the most elegant solution.
Simon Dawson
(Simon D.),
Narrow gauge Francophile interested in 1m, 60cm,50cm , 40cm and smaller gauges . Build in scales from 1/6th to 1/24th. Also 1/32nd and 1/35th using 16.5mm track to represent 50cm and 60cm gauges.
http://www.rue-d-etropal.com

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Postby Steve Bennett » Thu Jun 30, 2011 11:45 pm

From what I understand from talking to the guys at the OO9 society, Kato have no plans to release the bogies from the Portram as spares. Could be a question of matching a pair to give the same power characteristics, I know that was always a problem with the old Bachmann GE-44's.

Is there no recommended power unit for the OO9 loco?
Seems strange if it wasnt designed to fit on a specific mechanism, or provision made for it to accept something already available?
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Postby Adrian » Fri Jul 01, 2011 2:07 am

G'day Simon

Just one other disadvantage of the Portram bogies is that the motors run on a maximum of 4.5 volts.

Removing the circuit boards removes the electronic gubbins that drops the 12 volts on the track to the 4.5 needed for the motor.

So you either need a special low voltage controller, or leave the circuit board connected to the bogie or be very, very careful to not turn the control knob above half speed. (possible but NOT recommended....especially at exhibitions :!: :!: :!: :shock:)

Also any pulse power controller is likely to fry the little motor as these put a full 12volt pulse to the track at all times.

Just another problem and expense :!: :!: :!:

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Postby rue_d_etropal » Fri Jul 01, 2011 8:15 am

Would have to ask Tebee to ask about recommended chassis. I bought it partly because minimum order for Shapeways is more than the price for the On30 version of this loco, so added the OO9 version. I knew that at worst I count use it to build a dummy loco as part of diarama. That might be the easiest thing to do and build a wagon body on the Kato chassis to pusth loco along. I can always keep an eye out for a suitable chassis in future.
I also wanted to get a feel for what Shapeways could produce and am very impressed. I am seriously thinking of investing in some decent 3D CAD software.

Have noticed that many of the smaller motors are being quoted at less than 12 volts. This makes sence, and we as modellers have to adapt to what is commercially and technically available.
Simon Dawson
(Simon D.),
Narrow gauge Francophile interested in 1m, 60cm,50cm , 40cm and smaller gauges . Build in scales from 1/6th to 1/24th. Also 1/32nd and 1/35th using 16.5mm track to represent 50cm and 60cm gauges.
http://www.rue-d-etropal.com

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Postby rue_d_etropal » Fri Jul 08, 2011 6:18 pm

Been checking out Plaza Japam eBay site and they give dimentions of most chassis, but not for this one

Mini Size Train (Black) N scale - Aoshima 87213
http://cgi.ebay.co.uk/Mini-Size-Train-Black-N-scale-Aoshima-87213-/360377097907?pt=Model_RR_Trains&hash=item53e8261eb3
Wondering if anyone knows anything. This bodied model(despite being listed alongside chassis), looks like it has a different chassis to others from same company.
Simon Dawson
(Simon D.),
Narrow gauge Francophile interested in 1m, 60cm,50cm , 40cm and smaller gauges . Build in scales from 1/6th to 1/24th. Also 1/32nd and 1/35th using 16.5mm track to represent 50cm and 60cm gauges.
http://www.rue-d-etropal.com

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Postby Simon Andrews » Fri Jul 08, 2011 7:24 pm

Listed as a Caramel chassis here http://www.1999.co.jp/eng/10097448

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Postby Steve Bennett » Fri Jul 08, 2011 10:20 pm

Not sure if the chassis is the same in all the Skynet/Caramel loco's but they do appear to be similar. This dimensioned pic might help.
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