Steam loco or space rocket ?

Discuss Hornby Model Railway products and related topics here. This includes (Lima, Rivarossi, Jouef, Electrotren).
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Montfort
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Steam loco or space rocket ?

Postby Montfort » Tue Sep 25, 2018 5:54 pm

Hello,
I bought an old Hornby steam loco (#2439) built in 2005. Very cute teapot. But it runs like a space rocket. What can I do ? Thanks for your help.

R2439.jpg
R2439.jpg (60.46 KiB) Viewed 978 times
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BuffyMcBuffer
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Re: Steam loco or space rocket ?

Postby BuffyMcBuffer » Tue Sep 25, 2018 6:40 pm

Space rocket!

I believe all trains with the same motor/chassis run like it, I have a diesel 090 (I think it’s called) and that runs faster than our flying Scotsman?!!

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Bufferstop
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Re: Steam loco or space rocket ?

Postby Bufferstop » Tue Sep 25, 2018 10:33 pm

The later China made versions of the chassis (darkened coupling rods) can be driven more slowly, but there's no obvious reason why. I've tried various gear combinations, the most successful being the worm and gear from a Triang, pre ringfield motor bogie.
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Hymirl
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Re: Steam loco or space rocket ?

Postby Hymirl » Wed Sep 26, 2018 12:26 am

Not easily fixed, there us a reason why they are cheap as chips! Its basically a scaletrix motor/gear which is far too fast paced..
Last edited by Hymirl on Wed Sep 26, 2018 7:57 am, edited 1 time in total.

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RAF96
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Re: Steam loco or space rocket ?

Postby RAF96 » Wed Sep 26, 2018 7:09 am

Over the years folk have tried different motor/gear combinations but the most successful and most involved was the introduction of an intermediate gear with the motor raised horizontal to suit, the whole mounted on a new plasticard fabricated assembly.
On the RM Web forums somewhere.
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alex3410
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Re: Steam loco or space rocket ?

Postby alex3410 » Wed Sep 26, 2018 9:16 am

If using DCC you can configure the chip to limit top speed and give it some acceleration delay which may help mitigate its F1 tendencies :lol:

Either way if you find a solution make sure to report back, i have one of these tucked away that would be good to get out again

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Montfort
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Re: Steam loco or space rocket ?

Postby Montfort » Wed Sep 26, 2018 3:40 pm

I use DC. I need a very good DC controller. Something like the Gaugemaster Controls COMBI-EU.
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Montfort
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Re: Steam loco or space rocket ?

Postby Montfort » Thu Sep 27, 2018 10:37 am

Can I change the motor for a new one (X8966) ?
https://www.petersspares.com/hornby-x89 ... or-worm.ir
Maybe a new engine would run much slower than the old one.
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Montfort
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Re: Steam loco or space rocket ?

Postby Montfort » Thu Sep 27, 2018 2:02 pm

A wise guy gave me this excellent advice: "Put your money into a better quality controller if you want the best in slow speed running and leave the loco alone." That's exactly what I'm going to do.
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Bufferstop
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Re: Steam loco or space rocket ?

Postby Bufferstop » Thu Sep 27, 2018 2:59 pm

Montfort wrote:Maybe a new engine would run much slower than the old one.


No guarantee but it probably will. 5 pole motors usually run a bit slower, have a look whats on ebay, you might find a cheap 5 pole can type.
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Roger (RJ)
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Re: Steam loco or space rocket ?

Postby Roger (RJ) » Thu Sep 27, 2018 5:02 pm

You could try wiring one or more resistors in series with the motor, probably 100 to 200 ohms. Probably better to use a number of resistors, 3 or 4 to spread the heat that will be generated in them.

An alternative would be a series of diodes in series. The diodes would have to be two groups wired in inverse parallel so that the loco would still be able to go in forwards and reverse. General purpose diodes drop about 0.6 volts each.

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Montfort
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Re: Steam loco or space rocket ?

Postby Montfort » Thu Sep 27, 2018 5:23 pm

Thank you very much for all your answers gentlemen. Because I don't want to break my nice green loco, I chose the Gaugemaster solution.
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Bufferstop
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Re: Steam loco or space rocket ?

Postby Bufferstop » Thu Sep 27, 2018 11:41 pm

Solutions that involve resistors or diodes in series aren't really a solution, they just compensate for the controllers ability to get the voltage down the motor will still take the same voltage to start. (They can usually run at a lower speed than needed to start). That's why people have investigated changing gears, as raising the gear ratio results in lower speed at the same voltage, like changing down in a car. If you run it of DCC you have the option of setting starting voltage and speed steps separately which effectively kicks the motor into life before running it at a slower speed.
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Hymirl
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Re: Steam loco or space rocket ?

Postby Hymirl » Fri Sep 28, 2018 6:04 pm

Montfort wrote:Thank you very much for all your answers gentlemen. Because I don't want to break my nice green loco, I chose the Gaugemaster solution.


Can't go wrong with a decent gaugemaster!

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Bufferstop
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Re: Steam loco or space rocket ?

Postby Bufferstop » Sat Sep 29, 2018 6:14 pm

Anyone determined to take on one of these chassis with the simplest engineering, could do worse than buying a 12volt, 60rpm N20 format gear motor from eBay along with a 3mm bore pinion and crown wheel with a two or three to one ratio. No problem getting it in the body of even the GWR tank. Should go slow enough for anyone.
Growing old, can't avoid it. Growing up, forget it!
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