Reverse Superelevation ?

coyote97 said:
Some construction Engineers therefore always looked for constructions for radial adaption of the axles. Mr. Klose and the famous Klien-Lindner Axles are examples for that.
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And the problem with radial axles is they wear more in the centre as they don't scrub across the railhead and they need reprofiling more often. Demonstrated by the class 66 where they developed a tendency to disappear off track circuits on rusty rails as they had a concave profile and weren't running on the shiny bit of the railhead.
 
Sorry but Mr Attenborough often mentions the strength of tiny insects in comparison to humans
as they not only carry huge leaves etc but they have the proportionally larger force of grav y pressing down on them.

it
:@

I think gravity pressing down is my problem!
Mick
 
PaulRhB said:
coyote97 said:
Some construction Engineers therefore always looked for constructions for radial adaption of the axles. Mr. Klose and the famous Klien-Lindner Axles are examples for that.
Click to expand...

And the problem with radial axles is they wear more in the centre as they don't scrub across the railhead and they need reprofiling more often. Demonstrated by the class 66 where they developed a tendency to disappear off track circuits on rusty rails as they had a concave profile and weren't running on the shiny bit of the railhead.
Click to expand...

or were laying in a ditch at Carrbridge ...........
 
Woderwick said:
Is this the Northern or Southern Hemisphere ? It would nt work down under Shirley ?
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Are you suggesting, Wod, that Oz entirely consists of anti-gravity matter, and thus it stays on the lower half of the planet ? :nerd:
 
For all you cubists......try cubing this lot :bigsmile:

[size=14pt]Have delete text......was a naughty boy :bigsmile:

Thanks Nick
[/size]
 
Bredebahn said:
or were laying in a ditch at Carrbridge ...........
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:bigsmile: You tease, did someone tell it it was going to be used on a garden railway?

Fact is the reverse elevation has worked for Greg but he originally questioned if super elevation really works and there is proof that it does in the real world for several reasons and that if you follow prototype practice it does in miniature too. It's the first time I've has a good chuckle at a thread involving cubist? theory (well a GSC version of it), and physics.
 
Rhinochugger said:
Woderwick said:
Is this the Northern or Southern Hemisphere ? It would nt work down under Shirley ?
Click to expand...

Are you suggesting, Wod, that Oz entirely consists of anti-gravity matter, and thus it stays on the lower half of the planet ? :nerd:
Click to expand...

But if it consists of anti-gravity matter wouldn't it be lighter and end up on top? and what would Shirley being on top do for it . . . .
 
spike said:
[size=14pt]
First, a force of 2 to 5 pounds per ton of train weight is required ...[/size]
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Interesting stuff, but careful Mike - I may be wrong but that chunk of text looks to be ripped wholesale from www.republiclocomotive.com and is marked as copyright. After the recent fuss regarding use of images on here, best not to make a habit of lifting stuff and plonking it here. Just a thought.
 
ntpntpntp said:
spike said:
[size=14pt]
First, a force of 2 to 5 pounds per ton of train weight is required ...[/size]
Click to expand...


Interesting stuff, but careful Mike - I may be wrong but that chunk of text looks to be ripped wholesale from http://www.republiclocomotive.com/ < Link To www.republiclocomotive.com and is marked as copyright. After the recent fuss regarding use of images on here, best not to make a habit of lifting stuff and plonking it here. Just a thought.
Click to expand...


Tis true Nick
I was being lazy and not doing my own version.
Possibly one of mods would like to delete.

Wod!!!!
 
gregh said:
Rhinochugger said:
Are you suggesting, Wod, that Oz entirely consists of anti-gravity matter, and thus it stays on the lower half of the planet ? :nerd:
Click to expand...

Eureka, thats' why I need reverse super - it's the anti gravity in the southern hemisphere.
Click to expand...

Well, that explains it then, and it's only taken us 3 pages to do it :rolf::rolf::rolf:

Problem solved :thumbup::thumbup: :onphone:
 
Aljosha said:
However:
Still wanna share some 'detailed grief'.
- I have lots of inclines. Sadly cannot tell you the exact figure but think is high normal incline. Most locos have additional weight. Better performance but not endless.
- Hardly any wagons with metal wheels.
- Regularly have BOX-WAGONS misbehaving climbing out of even R3 curves if heavy/lots of wagons behind them.
- Worst culprits are CENTER DEPRESSED CARS. Often inner 2 axles climb out of curves/points for the slightest reason. Metal wheel fixed that to a certain degree.

BUT watching it happen in slow motion shows me how these wagons/axles do NOT behave at all like prototype.
So am frustrated cos think as long as not have R5's + no inclines + all metal wheels, this will keep happening! :angry:
(see post #5 for test pics - i.e. yellow Meindl wagon misbehaving as heavy wagons behind)
Click to expand...
if you want to measure your grades get a 600mm long spirit level and a dozen of so pieces of 3mm thick wood. Put the spirit level on the track and pack the lower end until it reads level. Count how many packing pieces you've used and that numer divided by 2 is your grade in %. or looked at another way, each 3mm piece corresponds to a grade of 0.5%
For a better description and picture see here:
http://www.members.optusnet.com.au/satr/BeginnersHints.htm

I also have major problems with my depressed centre wagon being my worst one to keep on the track. I suspect the load forces the leading wheels up, by trying to pivot the bogie front up.


I think a lot of these problems are due to our models not having springs. It's surprising no one has raised this issue with all the discussions about scale weight.

So we have unprototypical:
flanges,
curve radius,
weight,
springs

But who cares? I just want a train to LOOK prototypical as it rolls along. And that mainly means staying on the track.
 
Ah now springs :bigsmile:

Accucraft 1:20.3 have sprung trucks, and springs on the bogie pivots (the ones what I soften up by chopping off about three coils, in order to make them more acceptable to my indifferent track laying standards.)

Aristocraft rolling stock also has sprung bogies. The best bit is a Bachmann bobber caboose that I have mounted onto a spare Aristo 4-wheel spring chassis (that just happened to be lying around). the Bachmann bobber body must be slightly heavier than the Aristo one, with the effect that it rocks an' rolls all the way down the track :thumbup::thumbup::thumbup:

My big mistake was with the chassis that I built for my 2-6-2; with absolutely no play in the axle journals, it doesn't achieve the adhesion that a loco with that weight, and that size of motor ought to - It does fine for the limited size of trains that I can run, don't get me wrong, but if it could keep all 6 wheels on the rails at any one time, it'd pull a substantisally heavier load - probably a train long enough to cause the wagons to derail on the curves :rolf::rolf::rolf::rolf::rolf::rolf::rolf::rolf:
 
Rhinochugger said:
Ah now springs :bigsmile:

Accucraft 1:20.3 have sprung trucks, and springs on the bogie pivots (the ones what I soften up by chopping off about three coils, in order to make them more acceptable to my indifferent track laying standards.)
Click to expand...

I hadn't realised that some wagons had bogie pivot springs. Are they just a coil around the pivot screw? If so, I can't see how they would help keep the wagon on the track. The same weight is still pressing down on the bogie. As you say they'd just make the body rock and roll.
 
gregh said:
Rhinochugger said:
Ah now springs :bigsmile:

Accucraft 1:20.3 have sprung trucks, and springs on the bogie pivots (the ones what I soften up by chopping off about three coils, in order to make them more acceptable to my indifferent track laying standards.)
Click to expand...

I hadn't realised that some wagons had bogie pivot springs. Are they just a coil around the pivot screw? If so, I can't see how they would help keep the wagon on the track. The same weight is still pressing down on the bogie. As you say they'd just make the body rock and roll.
Click to expand...


Yes, they are on the pivot, and are compressed as the pivot screw is tightened up, to give the bogie pivot a self-righting action so that the wagon bed stays level. However, they do appear to give the bogie a bit more freedom of all round movement than the standard mountings. With the spring very tight, as supplied, there is insufficient movement, so by chopping off about three coils, they are a bit softer and do the business well.

Again, the bogies and wheels are metal, even on the plastic bodied rolling stock, so there's a good deal of weight, nice and low down. Closer up of two plastic bodied 1:20.3 wagons :bigsmile: (but not really close enough to see the detail)


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Cor thought I was on the wrong forum for a moment, very intresting though, like the idea of the washer.s on the back's of plastic wheel's, will have to give that a try as i have a lot of plastic wheel's and am to tight to keep buying metal one's:confused:
 
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