Highland Railway 7 ton timber wagon - Type L

I have been aiming to learn Fusion 360 for some time, but avoided starting (as if I need an excuse not to start ) before the Passenger tank was completed, well its damn close so .......

I find it easier to learn something if I have a reason to do it .......

And hear's mine, I decided to build some Highland Railway wagons to go with the Passenger tank, looking on the Gauge O Guild drawing library I found drawing Nos 3809, 3810 & 3811, duly ordered them up and is now the subject of this thread.

First up from drawing 3809 is the HR 7 ton timber wagon Type L with falling ends.

I scanned the image into the PC, then loaded it into Fusion as a canvas, and calibrated it to the overall length over the buffers of 19' 0" (133mm in 7mm).



So far so good .......



Now this is my first attempt at Fusion 360, I normally use 123D, and must admit i've been tempted to switch back, however I'll keep repeating I must go on, I must go on.......



Not sure if this was the best way, but then created a sketch for the top plank, extruded to 1mm thick, and then applied a fillet of 0.2mm to the edges.



the process was repeated for the two remaining planks / beam







Next the braces were added in the same manner, at first I thought they were just bits of metal strapping, er no, after looking at a couple of photo's they are big lumps of wood, so were extruded 2.5mm.







Now I have a bit of a dilema, do I do another copy of the side without the center support, as there are several photo's of these wagons converted to 2 plank single bolster, with the center brace removed and replaced with one of the cast iron stanchion holders - my next headache.



I feel the need for very strong coffee

Paul

 

Think I'm trending towards die trying

 

A little more work
Added the bolt heads



and the inner side



Next up will be to mirror the side, position it then create the ends and floor.

Paul

 

A little more progress before starting the daily chores

Side mirrored, then offset the correct distance (a scale 6' 10").

Next I used the drawing to create the end profile of the planks and extruded to size, each plank had a fillet of 0.2 mm added to all edges.
Same process for the buffer beam, but 2mm longer.



Chores await so hopefully will be back later

Paul

 

Bit more progress
End has had the brackets added, then mirrored



I've got rivet detail for the W irons and holes for the grab handle and rope eyelets. Then the stanchions I suppose.

But thats later

Paul

 

Before I head for bed, I thought i'd check the progress against the plan

Paul

 

Aye the mirror tool is great, with a couple of proviso's

The face you use as the mirror plane needs to be flat, so for the iron work on the sides to retain the end doors, it was easy to create the rear bracket from the front by selecting the body, then use the rear face as the mirror plane. (shown in yellow below).



But to get the brackets for the other end I couldn't set the mirror plane on either end. I got round it by making the side brackets part of the end body, then used the inner face of the end as the mirror plane. I suggest you hide the other bodies when you do the mirror, just in case there are unseen consequences.

Of course in my excitement, I forgot to model the holes for the buffers and the coupling hook, also on the sides bolts for the W irons, holes for grab handles, rope eyelets etc.
One of the features of Fusion is its time line running along the bottom of the screen, I have not played with this yet, but I'm hoping to back in the time line before the mirroring of ends and add the holes for the buffers, if it works then when I then go back to the end of the time line these holes should have all the same steps applied to them as the rest of the model, i.e. mirrored on to the other end. The just repeat the process for the bits I need to add.

When I add the floor was there a standardish plank size ?

Paul

 

Hi Mossy

Like you I tend to do multiple sketches on the various faces - so far 13 sketches, and I think 53 bodies.

I use the combine comand from the Modify menu to reduce the number of bodies, hence only fours parts listed now in the bodies section.



The side and end with (1) at the end of the name are the mirrored copy

Paul