🚀 go-pugleaf

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I finally made a "water level" today, a very useful instrument for
getting levels on a garden railway.

One of the first things I did with it was to measure the infamous grades
on the RVR's zig zag.

The steepest section of the middle road, which my little Krauss will
negotiate quite successfully with a four or five wagon on fine dry days,
but has defeated many much larger visiting locos, measures an amazing 1
in 12!

The bottom half of the middle road is a far more sensible 1 in 19, not
far off my intended 1 in 20!  Obviously, when I was originally surveying
it a major error in calculations set in about half way up!

Overall, the average grade from Bottom Points to Devlins is 1 in 17,
which would not be too bad, if it wasn't for that short pinch at 1 in
12!

However, I am going to deviate the entire top end of the zig zag,
eliminating Top Points and the reverse, thereby eliminating the zig zag
altogether.  In the best traditions of Australian steam railways a
steep, (albeit direct) bottleneck of a zig zag will be replaced  with a
longer, but more easily graded loop deviation.  The deviation will have
a grade of approximately 1 in 27, which should make life easier for
visiting locos!

In other RVR news, the extension of the main line from Bottom Points
towards a connection with the Emu Bay Railway at Guildford Jnt proceeds
apace.  The two span underslung Howe Truss over Dragonrock Gorge has
been completed and is only waiting the installation of the approach
trestles and track laying.  The site of Dragonrock station has been
cleared and is awaiting the attentions of the track gangs.  A shipment
of fine English rail is expected at any moment (Our supplier is having a
few days off over Easter!).

All this, will, of course, appear on my web site once construction is
completed and the official photographer has paid a visit.

However, getting back to the question in the header, is the middle road
of the RVR's zig zag the steepest adhesion worked railway in the world,
model or otherwise?

--
DPC James McInerney

STOP!  In The Name Of The Lore!

At http://www.cia.com.au/bullack/ , "Lambing Flat's" mainpage for the HO
model and NSWGR information.
Or http://www.cia.com.au/bullack/rvrtitle.html  for the "Rurr Valley
Railway", my G gauge garden line


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&nbsp;
<br>I finally made a "water level" today, a very useful instrument for
getting levels on a garden railway.
<p>One of the first things I did with it was to measure the infamous grades
on the RVR's zig zag.
<p>The steepest section of the middle road, which my little Krauss will
negotiate quite successfully with a four or five wagon on fine dry days,
but has defeated many much larger visiting locos, measures an amazing 1
in 12!
<p>The bottom half of the middle road is a far more sensible 1 in 19, not
far off my intended 1 in 20!&nbsp; Obviously, when I was originally surveying
it a major error in calculations set in about half way up!
<p>Overall, the average grade from Bottom Points to Devlins is 1 in 17,
which would not be too bad, if it wasn't for that short pinch at 1 in 12!
<p>However, I am going to deviate the entire top end of the zig zag, eliminating
Top Points and the reverse, thereby eliminating the zig zag altogether.&nbsp;
In the best traditions of Australian steam railways a steep, (albeit direct)
bottleneck of a zig zag will be replaced&nbsp; with a longer, but more
easily graded loop deviation.&nbsp; The deviation will have a grade of
approximately 1 in 27, which should make life easier for visiting locos!
<p>In other RVR news, the extension of the main line from Bottom Points
towards a connection with the Emu Bay Railway at Guildford Jnt proceeds
apace.&nbsp; The two span underslung Howe Truss over Dragonrock Gorge has
been completed and is only waiting the installation of the approach trestles
and track laying.&nbsp; The site of Dragonrock station has been cleared
and is awaiting the attentions of the track gangs.&nbsp; A shipment of
fine English rail is expected at any moment (Our supplier is having a few
days off over Easter!).
<p>All this, will, of course, appear on my web site once construction is
completed and the official photographer has paid a visit.
<p>However, getting back to the question in the header, <i>is </i>the middle
road of the RVR's zig zag the steepest adhesion worked railway in the world,
model or otherwise?
<p>--
<br>DPC James McInerney
<p>STOP!&nbsp; In The Name Of The Lore!
<p>At <A HREF="http://www.cia.com.au/bullack/">http://www.cia.com.au/bullack/</A> , "Lambing Flat's" mainpage for the
HO model and NSWGR information.
<br>Or <A HREF="http://www.cia.com.au/bullack/rvrtitle.html">http://www.cia.com.au/bullack/rvrtitle.html</A>&nbsp; for the "Rurr
Valley Railway", my G gauge garden line
<br>&nbsp;</html>

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