Llewellyn Loco Works #1

[Hydrostatic Dazza]

Mill off the top of the studs to height



Deburring with the "DSDT" (Dazza Screw Deburring Tool)



They ponder the cladding.
Would look better with 6 x 12 BA cylinder end cover studs rather than 4 x 10BA bolts. Next time.



HSS 1.30mm cladding punch.



1.00 HSS with point. Chopped off from the ends of 1.00m drill shanks, the drills can still be used





This is a trial piece of 0.25mm brass for the cladding, to get all the process and dimensions sweet.

A press with a stick of wood and the location is marked



With the trail sheet sorted I made a fair dinkem one.



The cylinder design has a crease/edge at the bottom, this allows for a flat for the drains, but I reckon next time the dimensions need altering to make the cladding job easier.



Left hand cylinder assembly to follow

[tom_tom_go]

Lovely bit of engineering. You could proudly place the cylinder alone on the mantelpiece.

[Peter Butler]

Your background team seem to be content with progress so far, I'm sure their encouragement will spur you on.

[Hydrostatic Dazza]

Lovely bit of engineering. You could proudly place the cylinder alone on the mantelpiece.

thanks.
It is about learning the techniques and tooling up for future projects

[Hydrostatic Dazza]

Your background team seem to be content with progress so far, I'm sure their encouragement will spur you on.

They do all the graft, I just lean back in the big armchair up in the mezzanine office and smoke cigars while the secretary sits on my lap taking notes while we both sip Grange Hermitage and discuss her pay rise ... .

[daan]

Very professional. looks terrific!

[Hydrostatic Dazza]

Trial fit to the frames.







while one of MAM's orchids kicks out

[steamer68]

Great craftsmanship looks really great in the frame.

[tom_tom_go]

Now that looks the part, love the cylinders.

[Big Jim]

They do all the graft, I just lean back in the big armchair up in the mezzanine office and smoke cigars while the secretary sits on my lap taking notes while we both sip Grange Hermitage and discuss her pay rise ... .

I want one of them, I don't think the current wife would be too happy though.


Excellent work on the cylinders, I am very envious of your machining skills. While I know my way around a workshop my work always looks a bit more 'agricultural'.

[Hydrostatic Dazza]

Another hiccup that I missed, " bad brain, bad brain" was the hex heads that hold the motion bracket mounting bracket angle to the frames will clash with the rivet heads. The books CAD drawings 3D and 2D do not show a rivet head, how effing convenient. There is plenty of room and I could have redesigned this but I was too dim to notice till too late. My motion bracket is different for correct direction of the reverser and separate slide bars, but I kept the mounting angle etc the same. Sigh! Move on.
I made a 1/16" rivet dolly and did some tests with a countersink rivet to clear the hex heads. Worked OK and my first guess on the rivet length was spot on. Ya gotta have a win some times.
So with MAM holding the bracket etc, I did the tap tap tap with a drift etc.





Trail fit up on the frames and all went well and within .002mm YAY!

[Hydrostatic Dazza]

I am making separate slide bars just to add to my troubles and I think it looks cooler than a bent up bit off the motion bracket.So to heck with it all, keep myself occupied and so I cut a strip off some 1.55mm gauge plate and a bit of mill and file and sand and I am attempting to polish the faces on 600 grit and then 1500 grit, double sided tape on some 1/2" HSS bit and then rob over the sheets of grit. I have just started the process of polishing.

[tom_tom_go]

Are you a 16mm NGM member because if you are you should enter this into the MOTY.

[Hydrostatic Dazza]

Are you a 16mm NGM member because if you are you should enter this into the MOTY.

I am a member and I am impressed with the way the society is run. I think MOTY is this
https://www.nationalgardenrailwayshow.o ... r-winners/

Our draft plan is to go to 2019 Peterborough show, and then to Bristol for a bike show. I will not be coming to the UK in 2018, it is too much to go each year, hard on resources and the flight is errrr yukkk and I have done return trip 20 plus times.
If we come in 2019 it is my intention to bring the loco, I have a Platt case on hand to transport the loco.

[Hydrostatic Dazza]

Redesigned cross heads underway in LG2 bronze

[Hydrostatic Dazza]

Trial fit up

[Hydrostatic Dazza]

A wee bit more done last night, some passes with the mill
while the mosquito coil smouldered after the storm passed

[tom_tom_go]

It's train engineering heaven all this!

[daan]

Really watch quality precision work.. I've not seen many drawings with 1/1000st of a mm measurements. Even if you have a good set of machinery and really sharp tools, these kind of tolerances are hard to get right without CNC machining. It's a joy to watch indeed.

[Hydrostatic Dazza]

Really watch quality precision work.. I've not seen many drawings with 1/1000st of a mm measurements. Even if you have a good set of machinery and really sharp tools, these kind of tolerances are hard to get right without CNC machining. It's a joy to watch indeed.

Thanks
.000mm is just because you can get errors when doing CAD when you are sorting imperial and metric. For example 1/8" is 3.175mm and you can have accumulative errors when adding up etc. In pencil drawings you miss this, but CAD is absolute and so it is easier to have 3 decimal places.
One can chase .01mm but splitting that to .005mm is not reality at the machines for me.
The proof is it is steams OK with a Slomo in the tender and I can make it creep up to the buffers :-)