HO/OO/Dublo

[Steve27752]

As a novice to model railways, what is the difference between HO/OO and Dublo?

[John H-T]

H0 is 3.5mm to 1 foot running on 16.5 mm track.

00 is 4mm to 1 foot running on 16.5mm track.

The reason for the development of 00 many years ago was the small size of British locos and it was difficult to fit the then available electric motors into them. The solution was to increase the scale by 0.5mm.

It does mean that the gauge of the track is not correct to scale: 16.5 represents 4'1 1/2", hence the specialist gauges used for EM and P4 which aim to get the scale/gauge relationship right. Sadly they remain minority interests as 00 was too well established.

Dublo was just Hornby's trade name for 00.

Hope this makes sense.

Best wishes,

John H-T

[62440]

As I understand it, HO is generally continental outline to a scale of 3.5 mm to 1foot, OO is usually British outline at a scale of 4mm to 1foot, and Dublo is the second word of the name of the now defunct Liverpool based manufacturer Hornby-Dublo, not to be confused with present day Hornby as the rights to the name have been held by several firms in the past.

Ho = Half O Gauge. O Gauge is 7mm to 1 foot scale.

Hope this helps, Regards, 62440.

[steam for ever]

Dublo is short for 'double O'

[Steve27752]

Thanks for the replies, it is a lot clearer now.