ASTT has added “Porta Papers Volume 5” to its book catalogue. It fills 340 pages, with 21 papers grouped into five categories:
- Modern Steam Concepts;
- Exhaust Systems;
- Compound Locomotives;
- Articulated Locomotives;
- Miscellaneous Topics.
The section on exhaust systems should be of especial interest to readers. It consists of three papers by Porta and a commentary by ASTT members Martin Johnson and David Fryer. A summary of these and the other 17 papers in the book can be found at http://advanced-steam.org/wp-content/uploads/2025/05/Porta-Papers-Vol-5-Inrroduction.pdf.
The book is available in soft cover at a cost of £27 excluding postage and packing. The usual 20% discount on in-house titles is offered to ASTT members.