Advanced Steam Traction https://validator.w3.org/feed/docs/rss2.html Equivalent Evaporation Membership Renewal John Hind – Chairman and Trustee AST Organisation Hendrik Kaptein Books For Sale Selection of Papers by L.D. Porta – Volume 5 An Introduction to Large-Lap Valves A Defence of the Midland/LMS Class 4 0-6-0 Physiology of the Locomotive Boiler – Vol 1 Reminiscences of a Trainspotter 762 Lyn Design Calculations 5AT Fundamental Design Calcs 5AT Feasibility Study Selection of Papers by L.D. Porta (and others) – Volume 4 Selection of Papers by L.D. Porta – Volume 3 Selection of Papers by L.D. Porta – Volume 2 Selection of Papers by L.D. Porta – Volume 1 L.D. Porta Centennial Anthology Vol 2 L.D. Porta Centennial Anthology Vol 1 Home ASTT Newsletters ASTT’s 2025 Conference Darlington 4/5 October 2025 1999 Article by Roger Waller restored to 5AT website 5AT Project 5AT Website Downloadable Papers and Broadcasts relating to Modern Steam Emissions Loco Performance Monitoring Valves, Valve Gear etc Prof. Bill Hall’s Software Richard Coleby – Committee Member and Trustee ASTT at the Greatest Gathering at Alstom’s Workshops in Derby – 1st to 3rd Aug 2025 Advanced Adhesion Tractive Effort Condensation/Wall Effects ASTT publishes Volume 5 in the “Porta Papers” series. 2025 Prospectus 2025 Conference – Darlington ASTT’s AGM Delayed till 25th April, and 2026 Conference plans Contact How to Join AST Membership Conferences 2024 Conference – Derby, 5th – 6th October Alex Powell’s 10 Feb 2026 Presentation on ASTT and the Revolution Project I.Mech.E Presentation on ASTT by Alex Powell – 10th Feb 2026 9th Annual Conference, Darlington 4th – 5th October 2025 The Revolution Project – a new concept in steam. Trackside Magazine publishes 8-page article on ASTT’s Revolution Project!