| Scale speeds? | |
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mikeyh

Location : Dordogne France
 | Subject: 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
 | Subject: 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. Full size mph |
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| Speed in feet per sec by scale |
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| 20 | 22 | 25 | 29 | 32 | 43 |
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| 1 | 0.07 | 0.07 | 0.06 | 0.05 | 0.05 | 0.03 |
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| 2 | 0.15 | 0.13 | 0.12 | 0.1 | 0.09 | 0.07 |
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| 3 | 0.22 | 0.2 | 0.18 | 0.15 | 0.14 | 0.1 |
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| 4 | 0.29 | 0.27 | 0.24 | 0.2 | 0.18 | 0.14 |
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| 5 | 0.37 | 0.33 | 0.29 | 0.25 | 0.23 | 0.17 |
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| 10 | 0.74 | 0.67 | 0.59 | 0.51 | 0.46 | 0.34 |
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| 15 | 1.1 | 1 | 0.88 | 0.76 | 0.69 | 0.51 |
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| 20 | 1.47 | 1.34 | 1.18 | 1.01 | 0.92 | 0.68 |
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| 25 | 1.84 | 1.67 | 1.47 | 1.27 | 1.15 | 0.85 |
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| 30 | 2.21 | 2 | 1.76 | 1.52 | 1.38 | 1.03 |
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| [tr]1 mile = 1760 yds = 5280 ft |
| [tr]1 mph = 5280 ft/h = 1.47 ft/sec |
| [][tr]5280(FT) / 3600(SEC) = 1.47 FT / SEC |
| [/td]
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
 | Subject: 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
 | Subject: 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
 | Subject: Re: Scale speeds? Sun Apr 05, 2009 2:11 pm | |
| You didn't ask !! Full size kmh |
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| Speed in cms per sec by scale |
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| 20 | 22 | 25 | 29 | 32 | 43 |
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| 1 | 1.39 | 1.26 | 1.11 | 0.96 | 0.87 | 0.65 |
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| 2 | 2.78 | 2.53 | 2.22 | 1.92 | 1.74 | 1.29 |
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| 3 | 4.17 | 3.79 | 3.33 | 2.87 | 2.6 | 1.94 |
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| 4 | 5.56 | 5.05 | 4.44 | 3.83 | 3.47 | 2.58 |
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| 5 | 6.95 | 6.31 | 5.56 | 4.79 | 4.34 | 3.23 |
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| 10 | 13.89 | 12.63 | 11.11 | 9.58 | 8.68 | 6.46 |
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| 15 | 20.84 | 18.94 | 16.67 | 14.37 | 13.02 | 9.69 |
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| 20 | 27.78 | 25.25 | 22.22 | 19.16 | 17.36 | 12.92 |
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| 25 | 34.73 | 31.57 | 27.78 | 23.95 | 21.7 | 16.15 |
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| 30 | 41.67 | 37.88 | 33.34 | 28.74 | 26.04 | 19.38 |
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| 1 kph = 1000 metres per 3600 seconds |
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| cms per sec | 27.78 |
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mikeyh

Location : Dordogne France
 | Subject: 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
 | Subject: Re: Scale speeds? Sun Apr 05, 2009 3:21 pm | |
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pjti
Location : Galizano, nr Santander, Nth Spain
 | Subject: 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
 | Subject: Re: Scale speeds? Sun Apr 05, 2009 5:42 pm | |
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GWhizz

Location : Charente, France
 | Subject: 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 Do you need isotopes ???  |
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Paul Stainz Holt

Location : North Wales
 | Subject: Re: Scale speeds? Sun Apr 05, 2009 6:43 pm | |
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Paul Stainz Holt

Location : North Wales
 | Subject: Re: Scale speeds? Sun Apr 05, 2009 6:45 pm | |
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| Scale speeds? | |
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