Model Engineer Vol. 207 No. 4411 In this Issue...271 SMOKE RINGS272 POSTBAG273 BUILDING A DARJEELINGHIMALAYAN CLASS B0-4-0 TANK LOCOMOTIVEIN 31⁄2in. GAUGE276 A HOME-BUILT 5cc COMPRESSION IGNITIONENGINE BASED ON THE ED2.46cc RACER279 MEMORIES OF YESTERYEAR282 TWIN CYLINDEROVERCRANK ENGINE286 MAKING AN ELBOW ENGINE290 UPDATING THE ERIC WHITTLEV8 AERO ENGINE293 ARMSTRONG’S HYDRAULIC ENGINE297 ROEDEAN300 LITTLELEC305 EDWARDIAN ELEGANCE310 A 1:6 SCALE BARRETT, EXALL & ANDREWESPORTABLE ENGINE312 CLUB NEWS314 BOOK REVIEWS315 DIARY