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 Scale speeds?

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mikeyh



Location : Dordogne France

PostSubject: Scale speeds?   Sun Apr 05, 2009 7:28 am

I was reading a book last night about french railways and it stated that the lesser radii of tramway/departmental trains could be applied if the train's speed was kept under 25 mph.

I have neither the knowledge nor the inclination to work it out but is a scale speed of 25 mph in a g scale loco possible without burning out a motor and what about live steam?

Mikey
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pjti



Location : Galizano, nr Santander, Nth Spain

PostSubject: Re: Scale speeds?   Sun Apr 05, 2009 1:20 pm

Couldn't resist the challenge guys Does it make sense ? And don't dare ask fer metric equivalents.





[tr][tr][][tr][/td]
Full size mph

Speed in feet per sec by scale





202225293243

10.070.070.060.050.050.03

20.150.130.120.10.090.07

30.220.20.180.150.140.1

40.290.270.240.20.180.14

50.370.330.290.250.230.17

100.740.670.590.510.460.34

151.110.880.760.690.51

201.471.341.181.010.920.68

251.841.671.471.271.150.85

302.2121.761.521.381.03

































































1 mile = 1760 yds = 5280 ft
1 mph = 5280 ft/h = 1.47 ft/sec
5280(FT) / 3600(SEC) = 1.47 FT / SEC


Last edited by pjti on Sun Apr 05, 2009 1:46 pm; edited 2 times in total
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pjti



Location : Galizano, nr Santander, Nth Spain

PostSubject: Re: Scale speeds?   Sun Apr 05, 2009 1:29 pm

mikeyh wrote:
I was reading a book last night about french railways and it stated that the lesser radii of tramway/departmental trains could be applied if the train's speed was kept under 25 mph.

I have neither the knowledge nor the inclination to work it out but is a scale speed of 25 mph in a g scale loco possible without burning out a motor and what about live steam?

Mikey

So Mikey I reckon that your 25mph comes out at AROUND 18 - 22 inches per second.
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mikeyh



Location : Dordogne France

PostSubject: Re: Scale speeds?   Sun Apr 05, 2009 2:04 pm

thanks Patrick. i tried to work it out three times and got a different answer each time!!

mikey
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pjti



Location : Galizano, nr Santander, Nth Spain

PostSubject: Re: Scale speeds?   Sun Apr 05, 2009 2:11 pm

You didn't ask !!

Full size kmh

Speed in cms per sec by scale





202225293243

11.391.261.110.960.870.65

22.782.532.221.921.741.29

34.173.793.332.872.61.94

45.565.054.443.833.472.58

56.956.315.564.794.343.23

1013.8912.6311.119.588.686.46

1520.8418.9416.6714.3713.029.69

2027.7825.2522.2219.1617.3612.92

2534.7331.5727.7823.9521.716.15

3041.6737.8833.3428.7426.0419.38










1 kph = 1000 metres per 3600 seconds







cms per sec27.78






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mikeyh



Location : Dordogne France

PostSubject: Re: Scale speeds?   Sun Apr 05, 2009 2:18 pm

thats a very useful chart!

mikey
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Carl Hibbs
Admin


Location : Haute Normandie - visitors welcome

PostSubject: Re: Scale speeds?   Sun Apr 05, 2009 3:21 pm

Yes it is useful, thanks.

You can make nearly all live steam locos go very slowly even without radion control.

I try and run mine at realistic speeds to my eye. I have never actually measured it but now I have the table I will do just that at the next exhibition!

Here are some clips of my machines running quite slowly/realistically......I think.



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pjti



Location : Galizano, nr Santander, Nth Spain

PostSubject: Re: Scale speeds?   Sun Apr 05, 2009 3:28 pm

Thanks mikey, maybe Carl can pin it up somewhere - hey boss !! It's probably something a lot of people wonder about.
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Carl Hibbs
Admin


Location : Haute Normandie - visitors welcome

PostSubject: Re: Scale speeds?   Sun Apr 05, 2009 5:42 pm

I will do that Patrick.
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GWhizz



Location : Charente, France

PostSubject: Re: Scale speeds?   Sun Apr 05, 2009 5:46 pm

carl hibbs wrote:
Yes it is useful, thanks.

You can make nearly all live steam locos go very slowly even without radion control.


Radion control eh! Is that even better than 2.4 GHz Shocked

Do you need isotopes ??? Razz
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http://www.frenchgardenrailways.com
Paul Stainz Holt



Location : North Wales

PostSubject: Re: Scale speeds?   Sun Apr 05, 2009 6:43 pm

In my humble opinion, scale speed on the Linz Gstadt Bahn.
(Stainz with the Flascherlzug - Bottle Train)

http://www.youtube.com/watch?v=6vuVjs8RSoI&NR=1

_________________
Excellent Austrian narrow gauge in North Wales.

Website http://linzgstadtbahn.webs.com/
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http://linzgstadtbahn.webs.com/
Paul Stainz Holt



Location : North Wales

PostSubject: Re: Scale speeds?   Sun Apr 05, 2009 6:45 pm

And a Zillertal train at full tilt...........

http://www.youtube.com/watch?v=HG6j7BwhmyU&feature=related

_________________
Excellent Austrian narrow gauge in North Wales.

Website http://linzgstadtbahn.webs.com/
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http://linzgstadtbahn.webs.com/
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PostSubject: Re: Scale speeds?   Today at 12:13 am

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