Completed the body of the banjo connection for the pressure-gauge, as drawn a few posts back, from round bronze bar.
I was surprised when I totted it up, how many separate operations / methods such an apparently simple, small part takes:
Turning including Screw-cutting and making a simple mandrel to hold it for:
Milling using a Dividing-head, Boring and Facing Head, and Rotary Table fitted with simple block drilled to act as a retainer.
Took it to the club this evening to test for fit on the locomotive – small modification to the bolt needed.
Then joined the rest of the crew for a Stationary Engine evening, the models including a Southworth Pump, and an Edwardian style Steam Launch.
The boat, of about 18 or so inches length and propelled by a Vee-twin oscillating engine with reversing valve, is fitted with two separate radio systems. One is the normal throttle and rudder controller. The other transmits signals from boilder temperature and water-level transducers, the latter being simple resistance probes giving high, middle and low levels. This system also monitors the main battery charge.