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Author Topic: Slow speed running - some test results  (Read 2647 times)

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Online longbow

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Slow speed running - some test results
« on: September 14, 2016, 09:50:52 am »
I've been testing the slow speed running of recent additions to my loco fleet on my test track (an 11-inch radius circle). Locos are all freshly run in, running forwards.

Slowest scale speeds achieved for a smooth continuous lap: M7 - 8.3mph, Standard 5MT - 5.7mph, Type 22 - 2.7mph.

I'd be interested to hear if these are typical and whether I have bought peaches or lemons.

Online Bealman

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Re: Slow speed running - some test results
« Reply #1 on: September 14, 2016, 09:57:25 am »
G'day, longbow  :thumbsup:

DCC or DC?
Vision over visibility. Bono, U2.

Online longbow

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Re: Slow speed running - some test results
« Reply #2 on: September 14, 2016, 10:13:05 am »
Thanks - forgot that important detail.

All DC at present. But open to DCC later if that improves low speed performance.

I'm planning a terminus layout operated in real life by M7s and Ivatt 2MTs hence my interest in whether these old models in particular are going to be up to a lot of slow speed work. Forum posts suggest not unless I'm especially lucky.

Offline newportnobby

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Re: Slow speed running - some test results
« Reply #3 on: September 14, 2016, 02:46:09 pm »
I think the difficulty with the M7 and the Ivatt will be found in trying a slow start and smooth acceleration as they tend to take off like scalded cats! :uneasy:

Online Dorsetmike

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Re: Slow speed running - some test results
« Reply #4 on: September 14, 2016, 11:22:44 pm »
If you add a resistor in the track feed it calms them down considerably. Put a switch across the resistor so you can short it out for other locos.
Cheers MIKE


How many roads must a man walk down ... ... ... ... ... before he knows he's lost!

Offline Dr Al

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Re: Slow speed running - some test results
« Reply #5 on: September 14, 2016, 11:44:17 pm »
The 5MT should easily be capable of as good or better than the diesel - it has a significantly superior quality coreless motor.

Cheers,
Alan
Quote from: Roy L S
If Dr Al is online he may be able to provide a more comprehensive answer.

Online longbow

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Re: Slow speed running - some test results
« Reply #6 on: September 15, 2016, 12:32:24 am »
You would think so but presumably gearing and driving wheel diameter also has an effect. The Type 22 has noticeably lower gearing. Speed at full power: Type 22 111mph, 5MT 149mph, M7 249mph+ (and not even full power!).

Thanks for the resistor idea DorsetMike. I'm from Dorset myself - that's Corfe Castle I presume?

Offline Dr Al

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Re: Slow speed running - some test results
« Reply #7 on: September 15, 2016, 12:33:51 am »
My 5MTs perform markedly better than 5.7mph, which does imply yours may not be optimal.

Cheers,
Alan
Quote from: Roy L S
If Dr Al is online he may be able to provide a more comprehensive answer.

Offline silly moo

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Re: Slow speed running - some test results
« Reply #8 on: September 15, 2016, 06:15:27 am »
Would the make and type of controller affect results in any way? Don't some locos improve after running in?

Offline Chris Morris

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Re: Slow speed running - some test results
« Reply #9 on: September 15, 2016, 07:33:57 am »
Would the make and type of controller affect results in any way? Don't some locos improve after running in?
This is certainly the case. My H&M walkabout (which Is my favourite controller despite its age) is fantastic controlling wild locos such as the Dapol 45xx but the 64xx with its coreless motor just will not run smoothly at low speeds. If I use a simple  Gaugemaster handheld the 45xx is much harder to run gently but the 64xx is nice and smooth at slow speeds.

Offline silly moo

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Re: Slow speed running - some test results
« Reply #10 on: September 15, 2016, 07:47:57 am »
I've got the cheap bog standard Bachmann controller that comes in their DC sets   and am surprised at how well it works. I bought extras off eBay.

Offline newportnobby

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Re: Slow speed running - some test results
« Reply #11 on: September 15, 2016, 09:36:05 am »
The controllers Silly Moo refer to are actually surprisingly good for control of locos although they have no other function e.g. accessories (oh - and don't use the track connectors. Find something more permanent)

Remember also the state of the track cleanliness wise will have a huge effect on how locos run, but that's an entire different thread.

Offline silly moo

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Re: Slow speed running - some test results
« Reply #12 on: September 15, 2016, 10:09:20 am »
Not to mention wheel cleanliness  :D
« Last Edit: September 15, 2016, 10:55:41 am by silly moo, Reason: Added emoji »

Online Bealman

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Re: Slow speed running - some test results
« Reply #13 on: September 15, 2016, 10:22:21 am »
Yep!
Vision over visibility. Bono, U2.

Offline lil chris

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Re: Slow speed running - some test results
« Reply #14 on: September 15, 2016, 10:43:48 pm »
This is the slow running on my 4MT fitted with a CT chip, this is has it comes too, not even tried to program it.
https://www.youtube.com/watch?v=wAIXa8E-XKY&feature=youtu.be
Lil Chris
My layout here East Lancashire Lines
http://www.ngaugeforum.co.uk/SMFN/index.php?topic=29492.0

 

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