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DAG Brown Injector and Ejector Designs - Very Impressed

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stephen goodbody12/09/2019 15:25:35
56 forum posts
40 photos

Hi all,

I recently tested three 26oz injectors, the first I have built, having the internals made to DAG Brown's design first published in Model Engineer magazine and latterly in his excellent book.

I'm happy to report that all three injectors worked first time and picked up reliably from 50 psi to 120 psi. I couldn't be more pleased!

I've also built a vacuum ejector using the internals detailed in Mr. Brown's book and, although not yet tested on steam, it certainly works far better on air than other designs I have tried to date.

I'm not sure whether Mr. Brown uses this website but, if anyone out there knows him personally, please convey my thanks to him for an excellent piece of work.

Best regards


Neil Wyatt12/09/2019 16:27:26
18316 forum posts
718 photos
77 articles

If you can attend any model engineering shows where the SMEE are exhibiting there's a good chance you will be able to meet Derek and thank him yourself.


stephen goodbody12/09/2019 16:53:19
56 forum posts
40 photos

Thank for the reply Neil, however I don't live in UK I'm afraid.

Best regards,


Neil Wyatt13/09/2019 20:53:39
18316 forum posts
718 photos
77 articles

I'm sure your comment will reach him


Howard Lewis13/09/2019 21:10:56
3765 forum posts
3 photos

If anyone wants to meet him, Derek will be demonstrating his Quorn cutter grinder, on the Peterborough Society of Model Engineers stand at the Festival of Model Railways at the Excel Centre, at the East of England Showground in Peterborough over the 7th and 8th of December,

He may well be on the S M E E stand at The Midlands Model Engineering Exhibition at The Fosse, in October, but I do not know if or when he will be there.


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