Recently completed G3, 2.5in gauge model of GWR City of Truro.
The model is entirely scratch built including the wheels which are aluminium with steel tyres, it is R/C controlled 18v DC motor.
Batteries are in the boiler splace and accessed through opening smokebox door, the electrics are in the tender also the sound card with the speaker under the coal
It has been a great pleasure to build in this scale, the engines seem almost real.
Mike