March / April 2016

VOLUME 50 NUMBER 2 FEATURES Vertical Hot Air Engine JERRY R. GROVES Using PTFE in Live Steam Applications JAN-ERIC NYSTRÖM Rio Grande K-27 – Part 15B KOZO HIRAOKA Cohunu Koala Park Railway and Steam Museum KEITH WATSON Building the New "Tom Thumb" – Part 18 Piston, Rod, Crosshead and Guide BILL SHIELDS AND TIM VAUGHAN [...]