Self starting?

This topic has 4 replies, 3 voices, and was last updated 30 July 2019 at 18:32 by David Bothwell 1.

Viewing 5 posts - 1 through 5 (of 5 total)

Author

Posts
30 July 2019 at 18:09 #421710
David Bothwell 1
Participant
@davidbothwell1
Please excuse this question in advance! I would like to know if Walschaerts valve gear (on a locomotive model) is self starting, or to put it another way should the loco start from any position (of the valve gear)? I presume it does on full size, Mine won't!!
Advert

30 July 2019 at 18:09 #33431
David Bothwell 1
Participant
@davidbothwell1
Walschaerts valve gear, is it self starting?
30 July 2019 at 18:24 #421711
J Hancock
Participant
@jhancock95746
Simple answer, yes !

But, not unknown for a full size locomotive to have to 'reverse' first , before pulling away in forward gear i.e. dead

spots can exist if timing slips.
30 July 2019 at 18:25 #421712
Jeff Dayman
Participant
@jeffdayman43397
Are the wheel quartered on the locomotive? Meaning are the crankpins on the driving wheels on one side at 90 degrees to the crankpins opposite?

This is what makes the engine self start or more accurately prevents the engine stopping at dead centre of either cylinder.

If the engine can stop on dead centre of both cylinders it probably will not self start under any circumstances. (regardless what valvegear is used).
30 July 2019 at 18:32 #421714
David Bothwell 1
Participant
@davidbothwell1
Thanks Jeff and mr Hancock, loco has been running but due to return crank movement it has stopped, revolves about 260 degrees"
Author

Posts

Viewing 5 posts - 1 through 5 (of 5 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
- Laser centre finder
  Started by: Buffer in: General Questions
- 4
- 6
- 3 July 2026 at 22:21
  Phil P
- 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
- NPT thread
  Started by: Bill Dawes in: General Questions
- 6
- 9
- 3 July 2026 at 20:24
  JasonB
- Optimum products? 1 2
  Started by: Alan Ambrose in: Manual machine tools
- 22
- 47
- 3 July 2026 at 19:50
  Michael Gilligan
- 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
- upgrade of Alibre Atom 3D
  Started by: David George 1 in: CAD – Technical drawing & design
- 5
- 8
- 3 July 2026 at 16:56
  JasonB
- Accolade
  Started by: Bill Dawes in: General Questions
- 3
- 3
- 3 July 2026 at 11:49
  Dalboy
- Easy as Pi
  Started by: Michael Gilligan in: Clocks and Scientific Instruments
- 2
- 2
- 3 July 2026 at 11:18
  Kiwi Bloke
- Coventry Diehead CH Reassembly
  Started by: Tony Ray in: Workshop Tools and Tooling
- 3
- 8
- 3 July 2026 at 10:54
  bernard towers
- Lathe coolant applicators
  Started by: lucerne in: Manual machine tools
- 2
- 2
- 3 July 2026 at 10:52
  bernard towers
- Flat Surface 1 2
  Started by: COLIN MARTIN 2 in: Materials
- 28
- 43
- 3 July 2026 at 05:18
  fredjscipione
- 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
- An arduino enigma
  Started by: duncan webster 1 in: Electronics in the Workshop
- 6
- 10
- 2 July 2026 at 22:08
  duncan webster 1
- 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
- What Did You Do Today 2026 1 2 … 4 5
  Started by: JasonB in: The Tea Room
- 36
- 117
- 2 July 2026 at 16:49
  jaCK Hobson
- 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
- ultra sonic cleaner
  Started by: Dalboy in: General Questions
- 10
- 13
- 1 July 2026 at 19:59
  Graham Meek
- How to stop juddering
  Started by: Peter Simpson 3 in: Beginners questions
- 7
- 10
- 1 July 2026 at 15:11
  Peter Simpson 3
- Small hobby lathes.
  Started by: activeviii in: General Questions
- 7
- 10
- 1 July 2026 at 12:41
  lukeama123

Self starting?

Self starting?

Latest Replies

Latest Issue

July 2026

Newsletter Sign-up

Latest Replies