I have got to the stage with my 5 inch gauge Manor where I am thinking about injectors. All the various model engineering books I have to hand provide a description of how injectors work etc, but none cut to the chase and give me the practical information I need as to appropriate size/capacity and horizontal v vertical.

Searching the Internet I still cannot find answers to all my questions. I have got as far as deciding to order injectors of Chiverton design from the relevant supplier. Also, that I need a copy of DAG Brown's book on miniature injectors. I plan to install twin injectors (to accompany the crosshead pump & tender hand pump as per Martin Evans' plans). And I can see an argument for injectors of differing sizes.

Having got this far, things start to get hazier. My best guess from the sparse wisdom I have managed to find is maybe a 16oz and a 24oz would be appropriate for a locomotive of this size. But horizontal or vertical is still a complete mystery.

Any advice on any of the above very welcome please.