Any suggestions for HO gradient?

In the US (NMRA S-3.2) the gauge is 1.250in (31.75mm), in Europe 32 mm.

For 1:48 scale, 1435:48 = 29.90mm or 1.177in would be appropriate.

On 3/3/2009 10:34 AM Erik Olsen spake thus:

Well, whaddya know, that *is* broad gauge (exactly 5'). Hmmm. So now I have yet another reason not to ever use O scale (unless my eyesight gets really, really bad *and* I stumble into a boatload of money).

It's about 6% oversize.

Look further, you'll find that the gauge min/max includes 32.0mm.

There were some modellers in the USA/Canada who adopted this gauge for

It's all rather confusing, really. ;-)

For more see:

cheers,

wolf k.

Here in the States (U.S. for those wondering) This is "Q" Scale/Gauge.

Chuck D.

Are you pretending to be stupid or are you stupid? I'll explain it one last time:

- the International standard for HO is 1:87. (has been since the 1930s)

- the one exception was Britain, where the standard was 3.5mm:1'.

- The US NMRA in recent years decided to make the US standard 1:87.1

Now, if the difference between 1:87 and 1:87.1 is insignificant, then why did those standard setters in the NMRA add that point one to 1:87? The additional point and numeral make any scaling computation more complex and therefore more liable to error. Any modelling of prototype to scale requires numerous calculations so the probability of errors in any project is greatly increased.

I'm currently involved in designing a kit for a locomotive, based entirely on drawings and a few photos. This involves a lot of scaling comutations and I'm quite capable of making my own errors without the assistance of silly scale ratios.

BTW, published drawings aren't neccessarily correct and differences between apparently the same prototypes aren't neccessarily incorrect.

Regards, Greg.P.

Gas: n. any aeriform or completely elastic fluid. Gasoline isn't that.

Calling a liquid fuel a "gas" is as stupid as calling food a "poison" because you eat a lot of fish. (see the French for fish)

Alumin-um to you too.

The line preceding my response suggests you see some difficulty.

Lots of things have proposed names - HO was initially OO.

So why don't you say "vay-hickle"?

Yeah, my mistake.

No, I was assuming you to be a thinking person and a practical person. (my mistake)

Here in New Zealand we moved to decimal currency while I was at high school and ISO measurements soon after I left school

Slicing butter (etc) rarely requires the accuracy required in building scale models.

Lucky you!

When I began my "sweat equity" in my various homes (1972) tools and materials were in a mix of metric and imperial. Sheet board (ply etc) was produced on machinery sized for imperial measurements, timber in metrics sold by individuals who had had a lifetime with the archaic measurements an couldn't change. (story from 1978: In hardware shop: "I want a dozen 6mm x 50mm coach bolts (to join baseboards)" "No problem sir." (gathers bolts) "I'll need washers and wing-nuts to go with those." "Washers, no problem. We've got 1/4" wingnuts?" "No, I need 6mm to go with the bolts." "we don't have any!" "When will you get some?" "When we sell out of 1/4"." "OK, I'll go with 1/4" x 2" coachbolts and 1/4" wingnuts." "sorry, we don't stock 1/4" bolts any more as there's no call for them."

Back when O gauge was invented the USa had standard gauge and broad gauge railways. 1:48 was an average of the two. ;-)

Just like 1:87.1! (If your dimestore happens to have a 1:87.1 scale)

On Tue, 03 Mar 2009 17:46:07 +1300, Charles Davis wro= te:

considered 5% scale variation between models to be unacceptable.

Greg.P.

On Wed, 04 Mar 2009 09:46:46 +1300, Wolf K wrote:=

Try calculating a prototype dimension like 3' 1 7/8" to modelling size i= n

error!

Greg.P.

You miss, or purposefully ignoring the point.

It's 'Close Enough' for the majority of folk. [Remember, back then it was not uncommon for "O" to be three rail, using an 'outside third rail' also, another GLARING departure from reality in most cases.]

Chuck D.

Sorry Greg, the 'Broad Gauge' was all 'standardized' around the time of the Civil War (for the railroads). The B&Os Broad Gauge 7' (I think it was), went away before then. Now Trolleys (Street cars, were another matter ---- some cities specified a 'Broader that the railroad' gauge to prevent waking up one morning to find a 'Railroad" running down Main Street. [Cross country RR builds to edge of town, ties into street car tracks, continues construction on the other side of town.]

Now there were (and still are in some cases) several 'narrow' gauges being used. Chuck D.

Chuck D.

That's because 32mm is the wrong gauge for 7mm/ft scale.

Don't look a gift fish in the mouth, Fugu breath. Ess, mein kindt.

I guess some towns just screwed up, or fell asleep at the switch, he said, remembering his conductor grandpa breaking the Nickel Plate way freight in two so as not to block a cross street while he and I and the crew went to lunch in a little cafe the road switcher was parked in front of.