7S-005-011S Sentinel Y1/Y3 British Railways (E) 8149 Steam Locomotive - DCC Sound Brand_Unknown 4 aspect standard offset signal

4 aspect standard offset signal kit square head

as it transpires

and function keys 1 to 8 show the current state of the function via LEDs

Drive the locomotive onto the turntable

Dapol Semaphore Instructions - Click here to download

7S-005-011S Sentinel Y1/Y3 British Railways (E) 8149 Steam Locomotive - DCC Sound Brand_Unknown 4 aspect standard offset signalThe Y1 Y3 sentinel was based on the road going lorry, utilising a similar centrally mounted steam tube boiler and chain drive system to the wheels. Whilst not having the greatest turn of speed (approximately 36mph top speed) these small locos proved capable of pulling a constant draw weight and were considered ideal for shunting in yards and providing motive power along smaller branch lines. These quirky little locos were used by all of the big four