drifting in mid gear

drifting in mid gear

This topic has 3 replies, 3 voices, and was last updated 14 June 2011 at 19:02 by JDEng.

Viewing 4 posts - 1 through 4 (of 4 total)

Author

Posts
14 June 2011 at 14:10 #5545
Ben Clarke
Participant
@benclarke31388
oiling cylinders
Advert

14 June 2011 at 14:10 #70299
Ben Clarke
Participant
@benclarke31388
With a mechanical lubricator how does one maintain an oil supply to the cylinders when drifting in mid gear.
14 June 2011 at 14:24 #70301
Diane Carney
Moderator
@dianecarney30678
Just a thought….
14 June 2011 at 19:02 #70318
JDEng
Participant
@jdeng
A mechanical lubricator should always be driven from a part of the motion which has a constant movement such as one of the main (as opposed to valve) crossheads or a part of the valve gear which does not alter its stroke length when the loco is notched up. Such a part is often one of the eccentric straps on a Stephenson fitted engine or one end of the expansion link or a return crank on a Walschaerts fitted loco.

If the lubricator is driven from any part of the valve gear which alters its stroke length as the loco is notched up then the amount of oil will reduce as the loco gets faster – a state of affairs which is not desirable!

If your engine’s lubricator is driven from a component with a constant length of stroke then it doesn’t matter whether you drift in mid or full gear, the oil delivery will remain unchanged.

John.
Author

Posts

Viewing 4 posts - 1 through 4 (of 4 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.

Code of Conduct

Latest Replies

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

- Topic
- Voices
- Posts
- Last Post
- Laser centre finder
  Started by: Buffer in: General Questions
- 14
- 25
- 5 July 2026 at 08:20
  Michael Gilligan
- Lathe coolant applicators
  Started by: lucerne in: Manual machine tools
- 5
- 5
- 5 July 2026 at 07:59
  Andrew Crow
- An arduino enigma
  Started by: duncan webster 1 in: Electronics in the Workshop
- 8
- 17
- 5 July 2026 at 06:53
  Joseph Noci 1
- Flat Surface 1 2 3
  Started by: COLIN MARTIN 2 in: Materials
- 32
- 53
- 5 July 2026 at 00:39
  alecs
- Accolade
  Started by: Bill Dawes in: General Questions
- 5
- 5
- 4 July 2026 at 23:06
  Bill Phinn
- Easy as Pi
  Started by: Michael Gilligan in: Clocks and Scientific Instruments
- 4
- 7
- 4 July 2026 at 22:46
  duncan webster 1
- Identifying the pitch of threading inserts
  Started by: Bill Phinn in: Workshop Tools and Tooling
- 5
- 12
- 4 July 2026 at 20:19
  Bill Phinn
- My week this week! My workshop videos 1 2 … 12 13
  Started by: Phil Whitley in: The Tea Room
- 16
- 324
- 4 July 2026 at 16:46
  Phil Whitley
- NPT thread
  Started by: Bill Dawes in: General Questions
- 8
- 11
- 4 July 2026 at 15:46
  Dave Halford
- New project for 2025 1 2
  Started by: SteveP in: I/C Engines
- 8
- 26
- 4 July 2026 at 15:12
  SteveP
- What Did You Do Today 2026 1 2 … 4 5
  Started by: JasonB in: The Tea Room
- 36
- 118
- 4 July 2026 at 13:27
  JasonB
- Optimum products? 1 2
  Started by: Alan Ambrose in: Manual machine tools
- 23
- 50
- 4 July 2026 at 11:45
  Adam Harris
- upgrade of Alibre Atom 3D
  Started by: David George 1 in: CAD – Technical drawing & design
- 6
- 9
- 3 July 2026 at 22:23
  Mark Rand
- Unwanted Car Software Update
  Started by: Chris Crew in: The Tea Room
- 16
- 23
- 3 July 2026 at 22:12
  Chris Crew
- Brass covered steel
  Started by: Dougie Swan in: General Questions
- 7
- 7
- 3 July 2026 at 22:04
  Ian P
- Leadscrew Handwheel for Warco WM180
  Started by: James A in: Manual machine tools
- 9
- 17
- 3 July 2026 at 20:45
  Andy Stopford
- Clarkson radius grinding attachment
  Started by: Andrew Tinsley in: Workshop Tools and Tooling
- 5
- 10
- 3 July 2026 at 19:28
  Clive Foster
- Gas Tap Valves. Vintage 1 2 3 4
  Started by: dee in: Related Hobbies including Vehicle Restoration
- 22
- 88
- 3 July 2026 at 18:36
  duncan webster 1
- Myford Ml7 Technical Drawings 1 2 3
  Started by: Harry Broadbent in: Model Engineer & Workshop
- 28
- 65
- 3 July 2026 at 17:20
  vintagengineer
- Coventry Diehead CH Reassembly
  Started by: Tony Ray in: Workshop Tools and Tooling
- 3
- 8
- 3 July 2026 at 10:54
  bernard towers
- 24cc DIESEL ENGINE FROM SOLID 1 2 3
  Started by: dean clarke 2 in: I/C Engines
- 13
- 58
- 2 July 2026 at 22:45
  dean clarke 2
- Running 380V 3-phase motor on 230V 1-phase 1 2 3 4
  Started by: jimalm in: Electronics in the Workshop
- 20
- 85
- 2 July 2026 at 22:38
  Vic
- Lathework for Beginners 1 2 … 4 5
  Started by: Neil Wyatt in: Manual machine tools
- 24
- 111
- 2 July 2026 at 17:36
  Howard Lewis
- Martin Cleeve Swing Clear Retracting Toolholder 1 2
  Started by: Roger Harvey in: Workshop Tools and Tooling
- 18
- 26
- 2 July 2026 at 10:03
  ega
- Replacement belt for Mk1 Clarkson cutter grinder.
  Started by: Andrew Tinsley in: Workshop Tools and Tooling
- 6
- 8
- 1 July 2026 at 20:53
  Andrew Tinsley

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

View full reply list.

Latest Issue

July 2026

Buy Latest/Back Issues

Newsletter Sign-up

Latest Replies