i took a picture of the lathe tool i used to cut the wheels, the tool has two tip cut on it, the tip on the left can cut the front profile of the wheel, the grooving tool can be used to cut the inner axle and part it off,
the two points are 10 mm apart in x-y so that the digital read-outs don't have to be reset.
the tool was cut on a wire cutter adding the correct clearence on the lathe tool.

3rd picture is the frames with the ABS spaces added

just the cad render showing the support for the worm shaft.

parts here were cut using a wire cutter edm machine, 

the advantage of these machines is that the wire is quite fine, allowing very fine corners.

shown are the cylinder with valve chest, as well as the slide rod supports

gears were cut from mod 64 gears stock, this is available from small parts and bearings.

hello all,
a long time i know, anyhow i have started to remake the new design,
i have a number of parts i have been making in the next few post.
first picture is the wheels, i turned these in one operation, i made a tool on a wire cutter edm,
it had two points so i could cut the front and back in one set up.

hi all, i have been doing some drawings lately. I have found some better motors and gears. This will improve running.

there both 12v and allow room for a flywheel. The garratt drawing is new, it is based on the NA mech parameters. As there is starting to be more wheels here i am tempted to get them made outside by an engineering firm. The garrets drawing is not finished, but most of the overall structure is done.

hi all, more pics. this is the first coat of paint. is just so i can put the glazing in and glue on the roof.

hi all, a few more images. its starting to look like a NA now. the chimney was turned on my lathe,

as was the air compressor. handrails and pipes are various sizes of brass wire. the filler caps (i think there filler caps? ) are heads of pins.

hi all, well i had a go at casting the boiler/side tanks. they turned out quite good. plenty of weight. the truck is a model tt truck, it is by micron art, http://www.micronart.com/index.html

hi all, been a while i know. here are a few recent pics. the new boiler section i have made is out of styrene. i will reproduce this in whitemetal. two reasons for this. i need the weight and i have multiple NA's on the go. so i only have to make one master.

not much added to the NA but i have had a go at some trackwork. the points are 5mm gauge.

there made by hand using code 40 micro-engineering rail and nn3 pcb sleepers from fast tracks.

Hi all, i have reworked the shaft. There is another support and a universal joint. Its hard to see but these are uni joints supplied by hollywood foundry. The mechinism still needs a good run in. need to build track. there is a piece of lead on top for traction. this will be replaced by the boiler and side tanks.

i finished the drive to the spur gear. runs well. I was a bit worried that the reduction on the g15 motor was going to bo to slow, but it looks ok to me. sorry the video is a bit blurry.

a few more images so far, the cylinders need to redone as there isn't enough clearence for the rods. i will increase the spacing by 0.7 mm from the centreline.

hi all, i have reworked the design of the rods and cranks to improve the assembly. the centre photo shows the jigs to press the wheels onto the axle muffs.

latest revision of a hon30 NA loco.

something else in the works,

a hon30 version of below. just a rough drawing to see the suitability of off the shelf motors and gearboxes.

hi all, a few more recent shots of the Na. the last photo shows the motor in the background.

the chassis is free rolling at this point. This design is far neater than the earlier one, assembly is simpler too.

cab

hi all, a few more recent pics. the white parts are cnc machined styrene. the 3rd pic i hadn't trimed the windows.

hi all. just a few more pics. the workshop is a bit full at the moment so have been working on the computer. the na i have changed, it now has a split chassie and solid drivers. both the na and the harman have there parts cut on a cnc mill. parts are either brass or plastic. in hindsight it is far more productive i think to design the locomotive completely. But i guess i can do a better job of it now as from the earlier i have a good idea of what can be machined and what cannot be.