|View single post by Giles|
|Posted: Sat Jul 15th, 2017 02:03 pm||
|However, I found that we had some unacceptable stalling at the one exhibition we've done so far. As well as trying to sort it through conventional means, i also wanted to have one RC loco.
Another Bagnall was chosen, and I started building the body from an old Wrightlines kit. It was however designed to go on a RTF Pug chassis,and I needed to build an entirely new one.
The first step was to draw up the frames and coupling rods on CAD. I blew them up to twice size, and laser cut them out of 2mm MDF to form templates, which I glued to another sheet of MDF. I then milled out these, and subsequently all the chassis components out of nickel-silver (mostly 0.028") using my little Proxxon pantograph engraver which I have modified to light milling.
The chassis is entirely silver-soldered, which makes for a lively strong and stable assembly.
The battery is a 650mAh, which will fit in the boiler (just!) And the motor is a little 6v 5:1 gearmotor, with a 20:1 final drive, which gives me a very nice appropriate speed at 3.7v
Radio by Deltang of course.
03B65D83-16E9-46C2-88CB-7D1F63F78992_zpsgmmk0e2a by giles favell, on Flickr
E705FDA5-8F95-4840-B673-60B3755F151B_zpssatbobgp by giles favell, on Flickr
070BF448-E4AF-4FA3-9E97-E0E780C825D3_zpsgclrchfq by giles favell, on Flickr
Pantograph Milling by giles favell, on Flickr
9D9C4ED7-0181-440B-AB22-EEA806A6267B_zpsjpe3ivwi by giles favell, on Flickr
Bagnall motion brackets silver soldered on by giles favell, on Flickr
Cylinder with valve guide and sleeve by giles favell, on Flickr
Last edited on Sat Jul 15th, 2017 02:16 pm by Giles
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