Australian Politics Forum - Remnants of Sydney’s Monorail

Sir Eoin O Fada

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Re: Remnants of Sydney’s Monorail
Reply #75 - Feb 3^rd, 2026 at 1:45pm

greggerypeccary wrote on Feb 3^rd, 2026 at 1:27pm:

Sir Eoin O Fada wrote on Feb 3^rd, 2026 at 9:20am:

Here’s anotherie clearly running on two rails

Two tracks, on top of one rail.

No, two rails on a girder; in railway parlance the track is the supporting medium and the rails, one rail to a monorail track, 2 rails for a conventional track, 3 rails for rack railways and some electrified systems plus more for some oddities.

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Carl D Gold Member Offline Australian Politics Posts: 10621 Rivervale, Perth Gender:	Re: Remnants of Sydney’s Monorail Reply #76 - Feb 3^rd, 2026 at 1:50pm I'm betting Sydney could build an entire new Monorail by the time this thread reaches its conclusion.
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greggerypeccary Gold Member Offline Australian Politics Posts: 149991 Gender:	Re: Remnants of Sydney’s Monorail Reply #77 - Feb 3^rd, 2026 at 1:58pm Carl D wrote on Feb 3^rd, 2026 at 1:50pm: I'm betting Sydney could build an entire new Monorail by the time this thread reaches its conclusion. As I said before: a strange hill to die on.
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greggerypeccary

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Re: Remnants of Sydney’s Monorail
Reply #78 - Feb 3^rd, 2026 at 2:01pm

Sir Eoin O Fada wrote on Feb 3^rd, 2026 at 1:45pm:

greggerypeccary wrote on Feb 3^rd, 2026 at 1:27pm:

Sir Eoin O Fada wrote on Feb 3^rd, 2026 at 9:20am:

Here’s anotherie clearly running on two rails

Two tracks, on top of one rail.

No, two rails on a girder; in railway parlance the track is the supporting medium and the rails, one rail to a monorail track, 2 rails for a conventional track, 3 rails for rack railways and some electrified systems plus more for some oddities.

The girder is the "rail".

Sydney's monorail ran on one girder/beam.

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freediver

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Re: Remnants of Sydney’s Monorail
Reply #79 - Feb 3^rd, 2026 at 2:02pm

freediver wrote on Feb 1^st, 2026 at 1:08pm:

Sir Eoin O Fada wrote on Feb 1^st, 2026 at 1:07pm:

freediver wrote on Feb 1^st, 2026 at 11:40am:

How many rails do you see there SEOF?

4?

8?

132 - one for each wheel?

Two, narrower than the Sydney one but two distinct tracks left by the wheels which means that the train is not designed to run on one wheel at each load bearing point so is not a one rail train, not a monorail.

The word ‘monorail’ means a single rail, therefore correct nomenclature for a single beam is (or could be) ‘monobeam’.

So you see two "tracks" on top of the monorail, but you do not see the two tracks on the side of the monorail?

I think you are confusing monorail with bicycle.

Why do you care so much about this? Were you bullied by a kid with a mohawk in primary school?

Have you decided yet whether you can see the other two "tracks" on the monorail SEOF?

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Sir Eoin O Fada

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Re: Remnants of Sydney’s Monorail
Reply #80 - Feb 3^rd, 2026 at 4:29pm

freediver wrote on Feb 3^rd, 2026 at 2:02pm:

freediver wrote on Feb 1^st, 2026 at 1:08pm:

Sir Eoin O Fada wrote on Feb 1^st, 2026 at 1:07pm:

freediver wrote on Feb 1^st, 2026 at 11:40am:

How many rails do you see there SEOF?

4?

8?

132 - one for each wheel?

Two, narrower than the Sydney one but two distinct tracks left by the wheels which means that the train is not designed to run on one wheel at each load bearing point so is not a one rail train, not a monorail.

The word ‘monorail’ means a single rail, therefore correct nomenclature for a single beam is (or could be) ‘monobeam’.

So you see two "tracks" on top of the monorail, but you do not see the two tracks on the side of the monorail?

I think you are confusing monorail with bicycle.

Why do you care so much about this? Were you bullied by a kid with a mohawk in primary school?

Have you decided yet whether you can see the other two "tracks" on the monorail SEOF?

The guide wheels on the side don’t count as they are the equivalent of the flanges on a conventional railway wheel, most suspended monorails use double flanged wheels.

Getting personal is a sure sign.

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freediver

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Re: Remnants of Sydney’s Monorail
Reply #81 - Feb 3^rd, 2026 at 4:31pm

Sir Eoin O Fada wrote on Feb 3^rd, 2026 at 4:29pm:

freediver wrote on Feb 3^rd, 2026 at 2:02pm:

freediver wrote on Feb 1^st, 2026 at 1:08pm:

Sir Eoin O Fada wrote on Feb 1^st, 2026 at 1:07pm:

freediver wrote on Feb 1^st, 2026 at 11:40am:

How many rails do you see there SEOF?

4?

8?

132 - one for each wheel?

Two, narrower than the Sydney one but two distinct tracks left by the wheels which means that the train is not designed to run on one wheel at each load bearing point so is not a one rail train, not a monorail.

The word ‘monorail’ means a single rail, therefore correct nomenclature for a single beam is (or could be) ‘monobeam’.

So you see two "tracks" on top of the monorail, but you do not see the two tracks on the side of the monorail?

I think you are confusing monorail with bicycle.

Why do you care so much about this? Were you bullied by a kid with a mohawk in primary school?

Have you decided yet whether you can see the other two "tracks" on the monorail SEOF?

The guide wheels on the side don’t count as they are the equivalent of the flanges on a conventional railway wheel, most suspended monorails use double flanged wheels.

Getting personal is a sure sign.

If each wheel was split axially into two separate wheels, to double the number of wear marks, would that double the number of rails? Or just the number of wheels?

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People who can't distinguish between etymology and entomology bug me in ways I cannot put into words.

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Sir Eoin O Fada

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Re: Remnants of Sydney’s Monorail
Reply #82 - Feb 3^rd, 2026 at 4:34pm

greggerypeccary wrote on Feb 3^rd, 2026 at 2:01pm:

Sir Eoin O Fada wrote on Feb 3^rd, 2026 at 1:45pm:

greggerypeccary wrote on Feb 3^rd, 2026 at 1:27pm:

Sir Eoin O Fada wrote on Feb 3^rd, 2026 at 9:20am:

Here’s anotherie clearly running on two rails

Two tracks, on top of one rail.

No, two rails on a girder; in railway parlance the track is the supporting medium and the rails, one rail to a monorail track, 2 rails for a conventional track, 3 rails for rack railways and some electrified systems plus more for some oddities.

The girder is the "rail".

Sydney's monorail ran on one girder/beam.

Except in the depot where it ran on two rails, proving, as I said, that it was not a monorail.

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Gnads

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Re: Remnants of Sydney’s Monorail
Reply #83 - Feb 3^rd, 2026 at 6:20pm

Sir Eoin O Fada wrote on Feb 3^rd, 2026 at 1:45pm:

greggerypeccary wrote on Feb 3^rd, 2026 at 1:27pm:

Sir Eoin O Fada wrote on Feb 3^rd, 2026 at 9:20am:

Here’s anotherie clearly running on two rails

Two tracks, on top of one rail.

No, two rails on a girder; in railway parlance the track is the supporting medium and the rails, one rail to a monorail track, 2 rails for a conventional track, 3 rails for rack railways and some electrified systems plus more for some oddities.

Don't go trying to tell me railway parlance - I worked 46 years in Rail - 10yrs as a Porter & Shunter - 13 yrs as a Guard & Drivers Assistant & 23 yrs as a Locomotive Freight & EMU & ICE driver.

You're wrong about Straddle Beam monorail trains, they run on top of a single girder - their wheels drive on a flat surface atop the girder. The width of the drive wheels & the marks they leave on the concrete doesn't matter - those wheels are not running on rails.

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Gnads Gold Member Offline Australian Politics Posts: 32852 Gender:	Re: Remnants of Sydney’s Monorail Reply #84 - Feb 3^rd, 2026 at 6:22pm Carl D wrote on Feb 3^rd, 2026 at 1:50pm: I'm betting Sydney could build an entire new Monorail by the time this thread reaches its conclusion. You've got that right ... he should change his name to Bullterrier - no matter what is said he won't let go.
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Gnads

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Re: Remnants of Sydney’s Monorail
Reply #85 - Feb 3^rd, 2026 at 6:38pm

Sir Eoin O Fada wrote on Feb 3^rd, 2026 at 4:29pm:

freediver wrote on Feb 3^rd, 2026 at 2:02pm:

freediver wrote on Feb 1^st, 2026 at 1:08pm:

Sir Eoin O Fada wrote on Feb 1^st, 2026 at 1:07pm:

freediver wrote on Feb 1^st, 2026 at 11:40am:

How many rails do you see there SEOF?

4?

8?

132 - one for each wheel?

Two, narrower than the Sydney one but two distinct tracks left by the wheels which means that the train is not designed to run on one wheel at each load bearing point so is not a one rail train, not a monorail.

The word ‘monorail’ means a single rail, therefore correct nomenclature for a single beam is (or could be) ‘monobeam’.

So you see two "tracks" on top of the monorail, but you do not see the two tracks on the side of the monorail?

I think you are confusing monorail with bicycle.

Why do you care so much about this? Were you bullied by a kid with a mohawk in primary school?

Have you decided yet whether you can see the other two "tracks" on the monorail SEOF?

The guide wheels on the side don’t count as they are the equivalent of the flanges on a conventional railway wheel, most suspended monorails use double flanged wheels.

Getting personal is a sure sign.

Except Safege Monorails that like Straddle Beam monorails use rubber tyred wheels that run on a flat surface also. The drive surfaces are not called rails.

Quote:

The SAFEGE system adapted the rubber-tired bogie used on the Paris Métro by mounting it inside a hollow steel box girder from which passenger cars were suspended. The bogies ran along the interior of the enclosed beam, with a narrow slot along the underside allowing suspension arms to connect to the cars below. The cars were mounted on a pendulum-type suspension with pneumatic springs, providing stability and comfort at higher speeds.

The Germans still have one of these operating & the Japanese have 2.

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Gnads

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Re: Remnants of Sydney’s Monorail
Reply #86 - Feb 3^rd, 2026 at 6:42pm

Sir Eoin O Fada wrote on Feb 3^rd, 2026 at 4:34pm:

greggerypeccary wrote on Feb 3^rd, 2026 at 2:01pm:

Sir Eoin O Fada wrote on Feb 3^rd, 2026 at 1:45pm:

greggerypeccary wrote on Feb 3^rd, 2026 at 1:27pm:

Sir Eoin O Fada wrote on Feb 3^rd, 2026 at 9:20am:

Here’s anotherie clearly running on two rails

Two tracks, on top of one rail.

No, two rails on a girder; in railway parlance the track is the supporting medium and the rails, one rail to a monorail track, 2 rails for a conventional track, 3 rails for rack railways and some electrified systems plus more for some oddities.

The girder is the "rail".

Sydney's monorail ran on one girder/beam.

Except in the depot where it ran on two rails, proving, as I said, that it was not a monorail.

No it did not. They were 2 flat surfaces that although separated were the same width (37 inches) as the single beam on track.

How they put them into the depot is irrelevant to their operation as a Straddle Beam Monorail on track.

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Sir Eoin O Fada

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Re: Remnants of Sydney’s Monorail
Reply #87 - Feb 3^rd, 2026 at 6:59pm

Gnads wrote on Feb 3^rd, 2026 at 6:42pm:

Sir Eoin O Fada wrote on Feb 3^rd, 2026 at 4:34pm:

greggerypeccary wrote on Feb 3^rd, 2026 at 2:01pm:

Sir Eoin O Fada wrote on Feb 3^rd, 2026 at 1:45pm:

greggerypeccary wrote on Feb 3^rd, 2026 at 1:27pm:

Sir Eoin O Fada wrote on Feb 3^rd, 2026 at 9:20am:

Here’s anotherie clearly running on two rails

Two tracks, on top of one rail.

No, two rails on a girder; in railway parlance the track is the supporting medium and the rails, one rail to a monorail track, 2 rails for a conventional track, 3 rails for rack railways and some electrified systems plus more for some oddities.

The girder is the "rail".

Sydney's monorail ran on one girder/beam.

Except in the depot where it ran on two rails, proving, as I said, that it was not a monorail.

No it did not. They were 2 flat surfaces that although separated were the same width (37 inches) as the single beam on track.

How they put them into the depot is irrelevant to their operation as a Straddle Beam Monorail on track.

Did you ever realise that all railway rails are flat on top, in fact wooden railway rails were very flat except for the railway that used trees for rails and left them round.

Of course the rails in the depot were the same gauge as the running surfaces on the beams, otherwise the trains would have fallen off.

Do you know when the current millennium started or were you brainwashed on that too?

As an aside, what do you think of a government that would licence a supposed passenger carrier as an amusement ride and keep the fact quiet so as not to adversely affect the paying patronage?

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Sir Eoin O Fada

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Re: Remnants of Sydney’s Monorail
Reply #88 - Feb 3^rd, 2026 at 7:21pm

Gnads wrote on Feb 3^rd, 2026 at 1:27pm:

Sir Eoin O Fada wrote on Feb 2^nd, 2026 at 8:26pm:

And here’s a ‘’monorail’’ about to go onto two rails. . . . . instant transformation.

No it's not you old duffer.

It's going onto a split in the middle girder & it's running surface remains flat on top of the girder.

They are not rails. Roll Eyes

Don’t know much about rails obviously some of the earliest trains ran on flat rails, just as the so called monorail in the picture, other early rails were flat but had a raised section to keep the flat flangeless wheeled trains on track.

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Sir Eoin O Fada

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Re: Remnants of Sydney’s Monorail
Reply #89 - Feb 3^rd, 2026 at 7:35pm

freediver wrote on Feb 3^rd, 2026 at 9:44am:

Quote:

I understand the technical details perfectly

Perhaps it is the simple logic you are struggling with.

Quote:

if a train can run on two rails it is not a monorail

What if you can stick it on a tripod on the back of a submarine?

Are you saying the track is a monorail but not the train running on it?

Or are you just dribbling incoherently?

Well obviously a girder which is wide enough for a train that has wheels running on both edges to then continue running on two distinct rails is not a monorail but if it is narrow enough that only single inline wheel sets cab fit on it then it is a monorail .

Many of what were called monorails are now described as People Movers, which is accurate.

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