# Math wizzard

Discussion in 'Scratchin' & Bashin'' started by DeaconF, Dec 23, 2006.

1. ### DeaconFMember

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OK - I am going to build my first scale model of a real building. It is called the Keenan Brothers factory. This factory turned out toothpicks in the late 1800's and was located in Owen Sound Ontario Canada. I have a drawing done by the Underwriters Survey Bureau.
The drawing scale is - one inch is equal to fifty feet.
My question is. Is there a multiplyer to change the dimentions to HO scale?
In other words if I have a wall on the drawing that is two inches long what do I multiply that 2 inches by to get it to HO scale.
Oh and BTW - Merry Christmas to all.
Thanks Frank
2. ### LongIslandTomMember

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HO scale is 3.5mm represents 1 foot.

So on your drawing, if one inch represents 50 feet, one inch on the drawing represents 175mm.

Hope this helps.
3. ### zedobMember

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Toothpickssign1 all I can picture in my mind is that old cartoon where they turned a big log into a tiny toothpick.

1 ft in HO is equal to .138", multiply that by 50 and you get 6.900"
4. ### 60103Pooh Bah

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Deacon: See if you can get an HO scale rule, although they usually don't come longer than 12". Based on the draw1ng scale, you may be able to use a tape measure with metric on it.
Where in Owen Sound was the factory? We spend a lot of our summer up there.
5. ### cidchaseActive Member

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Hi Frank,

6.9 (6.889) is the factor you requested. Measure a length on the 1:600 drawing.
Multiply that length by 6.9. This is the HO length of that measurement.

In your example, you measured a wall to be 2". That 100' wall would be 2 x 6.9 or 13.8"
in HO scale.:thumb:

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