The 'Rollbokkers' (the bogies placed under the axles of 4 wheel standard gauge wagons), used on part of the Harz (East Germany) would have followed that rule. They appear to be quite stable.
From: LRRSA@yahoogroups.com.au [mailto:LRRSA@yahoogroups.com.au] On Behalf Of Michael J
Sent: Friday, 9 February 2007 10:44 AM
Subject: [LRRSA] Re: The narrow gauge question? Best gauge?
--- In LRRSA@yahoogroups.com.au <mailto:LRRSA%40yahoogroups.com.au> , "Frank Savery" <franksavery@...> wrote:
If I remember right, there was another "rule" that the track gauge had
to be more than half the standard gauge track. Which implies that the
VR narrow gauge would not have been suitable for transhiper wagons
with broad gauge wagons.
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