381/380: Difference between revisions

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Created page with "'''381/380''', the '''five feet comma''', is the 127-limit ratio that is the difference between the 127/64 and 95/48. == Real life == It represents the difference between 152..."
 
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{{Infobox Interval
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'''381/380''', the '''five feet comma''', is the 127-limit ratio that is the difference between the 127/64 and 95/48.
'''381/380''', the '''five feet comma''', is the 127-limit ratio that is the difference between the 127/64 and 95/48.



Revision as of 18:32, 27 October 2022

Interval information
Ratio 381/380
Subgroup monzo 2.3.5.19.127 [-2 1 -1 -1 1
Size in cents 4.549895¢
Name five feet comma
FJS name [math]\displaystyle{ \text{d2}^{127}_{5,19} }[/math]
Special properties superparticular,
reduced
Tenney norm (log2 nd) 17.1435
Weil norm (log2 max(n, d)) 17.1473
Wilson norm (sopfr(nd)) 158
Open this interval in xen-calc

381/380, the five feet comma, is the 127-limit ratio that is the difference between the 127/64 and 95/48.

Real life

It represents the difference between 1524 mm railway gauge and the 1520 mm, which were used interchangeably in the areas of the former Soviet Union and Russian Empire. Such an approach did result in wear of the train undercarriage, but it wasn't significant enough of a difference and it was therefore applied for a certain time.

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