Scale speeds?

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

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
	20	22	25	29	32	43
1	0.07	0.07	0.06	0.05	0.05	0.03
2	0.15	0.13	0.12	0.1	0.09	0.07
3	0.22	0.2	0.18	0.15	0.14	0.1
4	0.29	0.27	0.24	0.2	0.18	0.14
5	0.37	0.33	0.29	0.25	0.23	0.17
10	0.74	0.67	0.59	0.51	0.46	0.34
15	1.1	1	0.88	0.76	0.69	0.51
20	1.47	1.34	1.18	1.01	0.92	0.68
25	1.84	1.67	1.47	1.27	1.15	0.85
30	2.21	2	1.76	1.52	1.38	1.03
	1 mile = 1760 yds = 5280 ft		1 mph = 5280 ft/h = 1.47 ft/sec		5280(FT) / 3600(SEC) = 1.47 FT / SEC

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.

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

mikey

You didn't ask !!

Full size kmh			Speed in cms per sec by scale
	20	22	25	29	32	43
1	1.39	1.26	1.11	0.96	0.87	0.65
2	2.78	2.53	2.22	1.92	1.74	1.29
3	4.17	3.79	3.33	2.87	2.6	1.94
4	5.56	5.05	4.44	3.83	3.47	2.58
5	6.95	6.31	5.56	4.79	4.34	3.23
10	13.89	12.63	11.11	9.58	8.68	6.46
15	20.84	18.94	16.67	14.37	13.02	9.69
20	27.78	25.25	22.22	19.16	17.36	12.92
25	34.73	31.57	27.78	23.95	21.7	16.15
30	41.67	37.88	33.34	28.74	26.04	19.38
1 kph = 1000 metres per 3600 seconds
cms per sec	27.78

thats a very useful chart!

mikey

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.

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

I will do that Patrick.

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 ???

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

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

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

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