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IRM Cement Bubble CAD Preview

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Warbonnet
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Since scheduled posts on Facebook decided not to work properly we've brought the surprise forward to now!

 

CAD for the cement bubbles! We've made rapid progress on these recently so here they are. A couple of tweaks still required. What do you guys think??

 

Cement_Bubble_01.jpg

 

Cement_Bubble_02.jpg

 

Cement_Bubble_04.jpg

 

Cement_Bubble_03.jpg

 

Cement_Bubble_05.jpg

Edited by Warbonnet
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thanks lads, we hope they hit the spot!

 

Well call me Captain Buzzkill, but these superb cad drawings of the upcoming model, may well convert me to a liking for the prototype I had never experienced. Resistance might be futile! :)

 

Top class guys :tumbsup:

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I must admit,

Designing and helping the guys bring these 2 delightful wagons to market has brought me a great deal of personal pleasure.

However, I only saw the bubbles once in traffic and cannot wait to see a rake of them on someone's layout.

Did these run as fixed rakes or where they marshalled into how ever many were needed for a job?

Cheers

Dave

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Detail looks great! Very very good. Any details to be added to the bottom of the dual discharge cones or that's hidden by the chassis?

 

There are a couple of things yet to go on the underside - the two vacuum chambers at the far left end, between the steels. There are also two brackets that straddle the centre of the wagon and the main discharge pipe, and the two rivetted plates at the bottom of the hopper "boobs".

 

I only have a drawing of the discharge pipe, no photos, and the pipe is supposed to straddle between the axle and bubble itself, so some compromises to achieve free running may be needed.

 

R

 

Cement_Bubble_Underside.jpg

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Did these run as fixed rakes or where they marshalled into how ever many were needed for a job?

Cheers

Dave

 

In early days, you'd get a few in the middle of a goods train. Latterly, like all modern goods trains, all the same type of wagon, all the same traffic, no variety and no guard's van!

 

So, if modelled in original grey, you'd generally get a mixture 9though not always) and there would be a brake van. When orange livery came in, you would still get them in a mixed consist with fertiliser or Guinness, but increasingly rakes only - and fitted by now so no van. Latterly, in cream livery, they'd have been just in fitted rakes.

 

Incidentally, a bogie fert wagon would make a good kit or RTR project.

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There are a couple of things yet to go on the underside - the two vacuum chambers at the far left end, between the steels. There are also two brackets that straddle the centre of the wagon and the main discharge pipe, and the two rivetted plates at the bottom of the hopper "boobs".

 

I only have a drawing of the discharge pipe, no photos, and the pipe is supposed to straddle between the axle and bubble itself, so some compromises to achieve free running may be needed.

[ATTACH=CONFIG]23786[/ATTACH]

Looking great, Richie. I was just curious as the "Presflo" method of fluidizing powdered solids to facilitate discharge from tankers has been of interest on the forum before

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I must admit,

Designing and helping the guys bring these 2 delightful wagons to market has brought me a great deal of personal pleasure.

However, I only saw the bubbles once in traffic and cannot wait to see a rake of them on someone's layout.

Did these run as fixed rakes or where they marshalled into how ever many were needed for a job?

Cheers

Dave

 

Something I have noticed of late looking back at old youtube clips is that in alot of cases they seemed to be "paired up" in a way that every 2 wagons were facing each other, not always but it's a pattern I noticed. It does look intentional and not by chance of random shunting of wagons into rakes.

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Thanks for all the kind words gents, great to see such positive feedback so far. As Richie said there's a few things to add/correct before we have it bang on.

 

Richie also deserves special praise in particular as if it wasn't for his tireless work on both these and the ballast wagons between research and scrutiny and corrections of the various CAD drawings to get them as good as they look in the drawings they wouldn't be anywhere near this high standard. Not bad for a new father with a day job as well! :)

Edited by Warbonnet
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In early days, you'd get a few in the middle of a goods train. Latterly, ... no guard's van!

 

So, if modelled in original grey, you'd generally get a mixture (though not always) and there would be a brake van. When orange livery came in, you would still get them in a mixed consist with fertiliser or Guinness, but increasingly rakes only - and fitted by now so no van.

As far as I am aware the bubbles were vacuum braked from the outset, each series from 25050 onwards, certainly recorded that way in 1967. I'm not certain the bubbles would have been retro-"fitted" that quickly, so they'd have to have been in the front/middle of a partly fitted rake even if loose coupled vans and a brake brought up the rear

 

Would definitely have to second that, JB! A rake of bogie ferts definitely one of my favorite freights.:x

A rake sorely needed :x

Edited by DiveController
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Dive,

 

The shot you posted of the rake rattling through Kildare from the O'Dea Collection - http://catalogue.nli.ie/Record/vtls000306704 - you can see the top of the vacuum chamber just on the last wagon on the right, so they did have them. The other one from Derry doesn't show them at all, but as JB rightly says they could have been mixed up in all sorts of rakes. Anyway, brake vans can look pretty sweet in a rake.

 

19930409_02-X3.jpg

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Since you've been so keen to mention the bogie fert twice in 24 hours JB, can I point out that it sits on a 42' chassis, (of which there is a grand little brass kit available) is a plate based design which would suit a brass kit (see where I'm going with this :P ?) and it might be in the best interest of a certain brass specialist to make the unit which would sit on top of that chassis.

 

As for beet, that requires a whole new tooling of a completely different chassis and unlikely to happen in the short term. I mean, who's going to want a chassis that will not just do Beets, but also

 

Curtain Side Cement Pallet Cement

Fuel Oil

Molasses Wagons

Pallet Wagon

Baryte Ore Wagons

Timber Wagons

Zinc Ore Wagon

 

Would you like Weshty's phone number to discuss the ferts :P

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