28ten
Guv'nor
I knew you would have an answer
shame they are out of stock
7mm Loose Ends
- Thread starter 28ten
- Start date
shame they are out of stock
Steph Dale
Western Thunderer
I knew you would have an answer
Yeah, it's a pain isn't it? With your solution of belt drive even the pulley would have been useful. Just wondering where you were going to get the belts from?
Steph
28ten
Guv'nor
http://www.nigellawton009.com/DriveComponents.html I used them on another project, and I see he does motors as well.
Steph Dale
Western Thunderer
adrian
Flying Squad
Nice one, didn't D1054 say the fans rotated at different speeds? Could you make one of the pulleys smaller than the other to achieve this effect?
28ten
Guv'nor
The thought had crossed my mind
I might just be simpler just to use 4 motors, the current draw is minimal, Im sure someone could tell me how to make them work off the decoder 
I need to draw up the motors and pulleys later this week.
28ten
Guv'nor
I had a quick look at the interior at 5.30 this morning 
the kits come with some nicely laser cut partitions, but if you want to fit glazing into the corridor partition then there is the problem of seeing glazing sheet inside the partition. Its a fairly common problem that you also get in some etched kits unless the designer has used an inner skin for the partition. So what can be done?
MDF partition and press fit glazing. using one of the little quirks of lasering ( a slightly tapered kerf ) the glazing can be pressed securely into the taper without needing glue. The crude diagram below shows what I mean
Applying the theory from the outside (only the middle partition is glazed btw)
Without the side
and from the corridor side, hopefully you can just see the reflection.
The downside is that the glazing is slightly prismatic, but Ill live with that, as I feel its worth it for being able to apply the no smoking transfers to the glazing. Im happy with the concept and it takes all of 10 seconds to glaze a partition.
the kits come with some nicely laser cut partitions, but if you want to fit glazing into the corridor partition then there is the problem of seeing glazing sheet inside the partition. Its a fairly common problem that you also get in some etched kits unless the designer has used an inner skin for the partition. So what can be done? MDF partition and press fit glazing. using one of the little quirks of lasering ( a slightly tapered kerf ) the glazing can be pressed securely into the taper without needing glue. The crude diagram below shows what I mean
Applying the theory from the outside (only the middle partition is glazed btw)
Without the side
and from the corridor side, hopefully you can just see the reflection.
The downside is that the glazing is slightly prismatic, but Ill live with that, as I feel its worth it for being able to apply the no smoking transfers to the glazing. Im happy with the concept and it takes all of 10 seconds to glaze a partition.
D1054
Western Thunderer
I really like the look of this, Cynric. I also think it will significantly reduce the sound problem with using the coarse nylon worm and gears I've been using
.
28ten
Guv'nor
I'll put you down for ten then !!I really like the look of this, Cynric. I also think it will significantly reduce the sound problem with using the coarse nylon worm and gears I've been using
It's JLTRT . The glazing is optical grade cast acrylic, expensive but they best you can get for glazing. Obviously the technique is applicable to any coach with a single piece partition. I'm not bothering with luggage racks, but some mirrors would be nice and possibly some lights.
Dog Star
Western Thunderer
Cynric, thank you for the details of the kit. Please let me check that I have this correct:-
* the kit is a JLTRT Mk1 coach;
* the "white" box contains compartment partitions / corridor screen as laser-cut MDF (2mm thick?);
* you have laser-cut some acrylic sheet to fit into the JLTRT MDF corridor screen.
Yes?
The "floor" looks like a typical JLTRT cast underframe with a brass overlay, how are the MDF parts attached to the floor? What do you get for the sliding doors of the compartments? How does you glazing idea work for the sliding doors?
Thinking (a) Easybuild Mk1s and (b) compartments and partitions of JLTRT Gresleys (which are all brass etch).
regards, Graham
* the kit is a JLTRT Mk1 coach;
* the "white" box contains compartment partitions / corridor screen as laser-cut MDF (2mm thick?);
* you have laser-cut some acrylic sheet to fit into the JLTRT MDF corridor screen.
Yes?
The "floor" looks like a typical JLTRT cast underframe with a brass overlay, how are the MDF parts attached to the floor? What do you get for the sliding doors of the compartments? How does you glazing idea work for the sliding doors?
Thinking (a) Easybuild Mk1s and (b) compartments and partitions of JLTRT Gresleys (which are all brass etch).
regards, Graham
28ten
Guv'nor
The kit has laser cut plastic(card) partitions. I just drew corridor partitions and compartment partitions (which I wont use the kit ones will work just as well ) For the doors I will use some 1mm rowmark and cut glazing to fit
The kit parts are fine, its just me being fussy. To get the tolerances required for a push fit I need to use my own parts and cut them at the same time. They will probably be attached with superglue or epoxy as there is plenty of contact area once the seats and partitions are added.
i have done some rowmark parts for Rob (Lancer) easybuild mk1s, but now with glazing. The alternative is two pieces of .75 rowmark sandwiching some clear glazing, good quality card will also work. Im a big fan of lasering high quality card the results are very good
The kit parts are fine, its just me being fussy. To get the tolerances required for a push fit I need to use my own parts and cut them at the same time. They will probably be attached with superglue or epoxy as there is plenty of contact area once the seats and partitions are added.
i have done some rowmark parts for Rob (Lancer) easybuild mk1s, but now with glazing. The alternative is two pieces of .75 rowmark sandwiching some clear glazing, good quality card will also work. Im a big fan of lasering high quality card the results are very good
28ten
Guv'nor
Im doing them all at the same time, imagine what my bench is like......BTW Cynric, how are you able to cope with several discussions going on at the same time? We have glazing... then there is the Wessie cab and fans.... not to forget the bogies. Just re-reading the posts on this page has the potential for confusion.
Otherwise -
28ten
Guv'nor
I think this is what you call 'bodge prototyping' but I chucked the dxf into the laser so I could see if things would fit the bogies and if I could use my highly technical method of checking spring deflection.....
An mdf etch the piano wire will be fitted to a guide soldered to the bearing but this is a quick way of testing the fulcrum points. Solidworks would do all this for me but you dont get a feel for the boing factor 
obviously the central fulcrum will be within the bolster
High tech weight simulation. I weighed the coach parts, divided it by two and found something the same weight...... I could go little thinker with the wire, but the main thing is that the action is quite nicely damped with a thicker wire, its just a question of cushioning the ride rather than climbing matchsticks
Next test, does it fit?
in a basic mk1
Commonwealth
and the delux etched version - yes i know its upside down)
Next step is to work out some brake attachment points and some 'pods' to attach the castings. Fingers crossed the etch will go off midweek and I can proceed with 9 pairs of bogies......
An mdf etch
the piano wire will be fitted to a guide soldered to the bearing but this is a quick way of testing the fulcrum points. Solidworks would do all this for me but you dont get a feel for the boing factor obviously the central fulcrum will be within the bolsterHigh tech weight simulation. I weighed the coach parts, divided it by two and found something the same weight...... I could go little thinker with the wire, but the main thing is that the action is quite nicely damped with a thicker wire, its just a question of cushioning the ride rather than climbing matchsticks
Next test, does it fit?
in a basic mk1
Commonwealth
and the delux etched version - yes i know its upside down)
Next step is to work out some brake attachment points and some 'pods' to attach the castings. Fingers crossed the etch will go off midweek and I can proceed with 9 pairs of bogies......
Phill Dyson
Western Thunderer
Looking good
28ten
Guv'nor
You wouldnt have an easybuild bogie lying about for some measurements?Looking good
Phill Dyson
Western Thunderer
I have some Commonwealths
