The silver soldered copper boiler was hydraulic tested at 250psi for 30 minutes when completed by the builder; since arriving with us it's had a twice working pressure test with all fittings, showing no leaks or distortion - a beautifully made thing which we would warranty as sound.
The chassis runs well on air in either direction with even exhaust beats.
Side tanks are not fitted with a balance pipe - the builder's choice - instead each tank feeding its own injector. The air pump on the original locomotive has been converted on the model to a boiler feed pump.
For driving the dummy coal load lifts out to expose a hand pump, the rear cab panel removes to allow easy access to firehole door and controls.
| length/inches | 41 |
| width/inches | 11 |
| height/inches | 18 |
| weight/kg | 73 |
| wheel material | cast iron |
| axlebox type | plain bearing |
| cylinder material | cast iron |
| valve type | slide |
| valve gear | Stephensons |
| reverser type | pole |
| lubricator type | mechanical |
| injector(s) | 2 |
| boiler number | HT20 |
| CE mark | n/a - non-commercial |
| working pressure/psi | 100 |
| boiler type | locomotive |
| boiler material | copper |
| boiler construction | silver soldered |
| superheater(s) | 3 |
| superheater type | flue tube |
| fusible plug | no |
| safety valve(s) | 2 |
| safety valve type | spring |
| mechanical pump | 1 |
| whistle | yes |