Model Engineer Magazine No.4391 Including:SMOKE RINGSNews, views & comment onthe world of model engineering.BUILDING A DARJEELINGHIMALAYAN CLASS B 0-4-0TANK LOCOMOTIVE IN31⁄2in. GAUGERay Mc Mahon commenceswork on the cylinders.FROM NOVICE TO EXPERTAlan Hearsum builds a ‘ Preston’ typeopen top tramcar in 1:16 scale.THE VAN RENNESCALORIC ENGINESJames G. Rizzo completes thecrankshaft assembly & startswork on the power plant.I/C TOPICSDave Parkes offers his designfor a 3.2cc glow engine.THE 2010 MIDLANDS MODELENGINEERING EXHIBITIONThe Editor makes a flying visitto this well-established show.THE 21st NATIONALLOCOMOTIVE RALLYDavid Piddington concludeshis report on this event hostedby Birmingham SME.