3 inch Weir engine

This topic has 1 reply, 1 voice, and was last updated 20 December 2020 at 15:49 by Half centre.

Viewing 2 posts - 1 through 2 (of 2 total)

Author

Posts
20 December 2020 at 15:49 #514562
Half centre
Participant
@halfcentre
Hello everybody.

Myself and a friend have both bought the castings for the 3 inch vertical Weir pump (originally Southworth engine design, now sold through Blackgates). We built them (in lock down) independently and when attempting to run on air they both suffered the same problem. The air was continuously vented through the exhaust port? The engines would not run. My friend is a very able and experienced model engineer, I less so, however between us we are puzzled what is happening. Both valves move freely past each other and seem loose enough on their spindles / piston to contact the valve plate and ports. Making a Perspex valve chest cover did not reveal anything obviously wrong in the valve chest. Have we both made the same error in our machining? We know these engines can work – we have seen them! Any suggestions very welcome

Martin
Advert

20 December 2020 at 15:49 #27841
Half centre
Participant
@halfcentre
Weir pump problem
Author

Posts

Viewing 2 posts - 1 through 2 (of 2 total)

Please log in to reply to this topic. Registering is free and easy using the links on the menu at the top of this page.

Advert

Latest Replies

Viewing 25 topics - 1 through 25 (of 25 total)

- Topic
- Voices
- Posts
- Last Post
- Survival Challenge TV for engineers!
  Started by: Neil Wyatt in: The Tea Room
- 14
- 23
- 26 August 2026 at 10:21
  noel shelley
- Cutting 25 thou grooves for a couple of circlips
  Started by: Andrew Tinsley in: General Questions
- 8
- 11
- 26 August 2026 at 10:05
  JasonB
- Drill grinders/sharpeners and their capabilities
  Started by: Bill Phinn in: Workshop Tools and Tooling
- 9
- 20
- 26 August 2026 at 09:32
  Pippin
- Plug in Solar 1 2 3 4
  Started by: Vic in: The Tea Room
- 29
- 96
- 26 August 2026 at 08:27
  Adrian R2
- Reconstruction of dimensions fom a photo…
  Started by: Robin Graham in: Beginners questions
- 4
- 5
- 26 August 2026 at 07:56
  John Haine
- Chronos closing down. 1 2 3
  Started by: Andrew Tinsley in: General Questions
- 32
- 75
- 26 August 2026 at 07:31
  Trevor Drabble 1
- Parting off 1 2
  Started by: Peter Simpson 3 in: Beginners questions
- 19
- 41
- 25 August 2026 at 22:39
  interferencefit
- Nameplate Identification
  Started by: onarion67 in: Workshop Techniques
- 4
- 8
- 25 August 2026 at 19:07
  Martin Johnson 1
- Honing cylinder
  Started by: Speedy Builder5 in: Workshop Techniques
- 6
- 11
- 25 August 2026 at 17:15
  Speedy Builder5
- Scam response to advert
  Started by: Lee Rogers in: The Tea Room
- 1
- 1
- 25 August 2026 at 12:58
  Lee Rogers
- Annealing extruded acrylic
  Started by: Mick Bailey in: Materials
- 1
- 1
- 25 August 2026 at 09:49
  Mick Bailey
- Myford Lathe Identification
  Started by: Captain Barnacles in: Manual machine tools
- 8
- 14
- 25 August 2026 at 08:40
  Howard Lewis
- All things Beaver Mill 1 2 … 9 10
  Started by: Robert James 3 in: Manual machine tools
- 43
- 238
- 25 August 2026 at 05:37
  Lex Davis
- Super Simplex Build
  Started by: Peter Hoerlein in: Work In Progress and completed items
- 7
- 20
- 25 August 2026 at 05:00
  Peter Hoerlein
- Modifying the OKMO P51 Friction Clutch for a Model Steam Engine
  Started by: Blue Heeler in: Work In Progress and completed items
- 1
- 1
- 25 August 2026 at 01:20
  Blue Heeler
- Ketan Swali 1 2
  Started by: Bill Davies 2 in: The Tea Room
- 41
- 47
- 24 August 2026 at 17:55
  old mart
- What parting off tool and how to get parallel faces?
  Started by: interferencefit in: Beginners questions
- 14
- 20
- 24 August 2026 at 17:31
  old mart
- How much has AI affected you personally so far? 1 2
  Started by: Robin Graham in: The Tea Room
- 23
- 36
- 24 August 2026 at 11:19
  Michael Gilligan
- Bridge collapse 1 2
  Started by: JA in: The Tea Room
- 13
- 28
- 24 August 2026 at 09:19
  Adrian R2
- 1904 Whitehead Vertical Gas Engine
  Started by: JasonB in: I/C Engines
- 3
- 6
- 24 August 2026 at 09:09
  Michael Gilligan
- Identifying Moore and Wright Notched Calipers
  Started by: Thomas Wilshaw in: Workshop Tools and Tooling
- 6
- 7
- 23 August 2026 at 20:51
  old mart
- Hydrostatic Transmission by Mike Tilby
  Started by: Ronald Wagner in: Model Engineer & Workshop
- 4
- 9
- 23 August 2026 at 20:44
  duncan webster 1
- Uniflow engine
  Started by: AStroud in: Work In Progress and completed items
- 2
- 2
- 23 August 2026 at 18:55
  JasonB
- GRAVOGRAPH AF3
  Started by: Speedy Builder5 in: Workshop Tools and Tooling
- 2
- 3
- 23 August 2026 at 11:56
  Michael Gilligan
- Small 3D Metal Printed Part
  Started by: Julie Ann in: 3D Printers and 3D Printing
- 6
- 11
- 23 August 2026 at 09:02
  Julie Ann

3 inch Weir engine

3 inch Weir engine

Latest Replies

Latest Issue

September 2026

Newsletter Sign-up

Latest Replies