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Discussion Starter · #1 ·
Hi guys just a quick one, i had a OO layout years ago an had a bigboy my uncle had a G Scale layout an had a big boy i no run O Guage an would like to no who if anyone makes a big boy? An what is the us equivilet scale to O in the UK thanks guys
 

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O in the uk is the same its 7mm to the ft. As far as im aware there is not a big boy model available anywhere at the moment - I will how ever have a look for you and post back on here if i find anything!!!

Nikki
 

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QUOTE (Madkitten @ 30 Dec 2007, 10:04) <{POST_SNAPBACK}>O in the uk is the same its 7mm to the ft. As far as im aware there is not a big boy model available anywhere at the moment - I will how ever have a look for you and post back on here if i find anything!!!

Nikki

***Ummm no Nikki,

the US O scale is actually 1:48th scale or 1/4" to the foot... UK is 7mm or 1:43.5 ~1:44. Almost the same "relative" difference as HO 1:84 to OO 1:76 in reality. US O scale has a slightly different NMRA "standard" gauge at 1.25" (slightly overscale). EU has 32mm, AMRA 31.875mm and UK as usual has half a dozen slightly different gauge/track standard possibilities :).

Of course its probably not an issue to the questioner, but it is "how it is". (in fact TEMPLOT specifies an incredible different 13 sets of "O" scale related track standards for 4'8-1/2" gauge track... and thats ignoring the many "Narrow gauge O scale" options!)

Incidentally both K-Line and MTH also make a 1/4" scale big boy.... a quick google will show lots of references to them.

Kind regards and best wishes for the New Year

Richard
 

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Discussion Starter · #6 ·
so what do you mean richard, the trains will run on the track but will look out off place or wont run on the track an fall off all the time?
 

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QUOTE (chrisholleyuk @ 30 Dec 2007, 21:13) <{POST_SNAPBACK}>so what do you mean richard, the trains will run on the track but will look out off place or wont run on the track an fall off all the time?

**Actually I suspect it will run just fine, as RTR is usually quite tolerant and we are talking only a mm or so. but... I've never tried so perhaps an O scale modeller will give you more pragmatic data.

as to "look" a big boy is huge so having it slightly smaller in scale will not look too out of place at all - just like HO and OO scale models generally look OK on the same track.

I'd expect to need some pretty substanital radius curves though - and lots of "adjacent clearance" on the curves as an O scale big boy is a huge loco!

Richard
 

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QUOTE I'd expect to need some pretty substanital radius curves though - and lots of "adjacent clearance" on the curves as an O scale big boy is a huge loco!

For gauge 1 which is the next scale up from O, the recommended minimum radius for Big Boys and similar "doubled" locomotives is 10 feet! The minimum for the new Accucraft "Flying Scotsman" in gauge 1 is 4 feet. That makes a factor of 2.5 times larger radius. That factor may hold for O gauge as well, though scaling from one size to another never seems to be quite linear.

David
 
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