1831

I have started to build this loco which was designed 1941/3 and described in the model engineer at the time . I inherited the part built (75%) petrol engine which I have since almost completed , so I have now started on the loco itself . With the help of friends both old and new I have managed to source most of the drawings . I have started a photo album and will try to remember to update it now and then . I have attached here a photo of the current progress .

I.d like to see further progress Good luck!

Love to follow this Jeff, don't let people who don't engage disallusion you from posting as there are many silent followers of the threads on here. Your work will be appreciated and provide a kick up the a**e for many of us.

Mike

Looking good so far Jeff, love to see how you are getting on.

Thor

Excellent There are many examples of the petrol engine around but very few locomotives.

Jeff - Is the model based on a full sized loco (details please?) or was it designed just as a model?

Rik

oops!

Edited By Rik Shaw on 09/04/2018 10:11:24

Edited By Roderick Jenkins on 09/04/2018 10:35:21

Looking good! Presume 3-1/2 inch gauge?? What drive system will be used? My 5" gauge 'diesel' to a different design is still unfinished after more than 2 years, but it's been a pretty steep learning curve over that time as well. Hope yours is a quicker build .

Jeff I have 2 part builds (not by my self) and other bits and some information you may find useful

LMS Journal No2 pub wild swan has a 20 page article on the prototype including drawings and photos

Model engineers laser do a body kit (Ivan Laws design)

Ian Bradly did some mods ME 2 nov 1944 larger flywheel 24 sept 1942 pressure relief for the oil pump and eccentric idler gear in valve train

I had A friend NC some coupling rods for me in steel, I do not like the look of the original ones in aluminium (wrong colour)

Paul

The original was an experimental diesel shunter . It started life as an 0-6-0 steam loco circa 1890 . The L.M.S removed the boiler , cylinders and other bits , they then fitted a diesel engine and a Heath Robinson drive mechanism . It wasn't a great success but they carried on with follow ups . The drive system in the model is a friction system which I intend to build as drawn . Many people had trouble with it . Ian Bradley made a three speed and reverse gearbox for his and others did similar things . Thank you Paul I am aware of the laser bits but I'm old fashioned and like to produce my own bits and pieces . incidentally I have seen Ivan's example a long time ago .I am currently machining cast iron blanks for the wheels which I'm chewing out of the solid ( more swarf than job ) That's it for now I will post the odd pic now and then .

I've got the popcorn ready and will be watching the build too! It's looking great so far. Cheers JD

Thanks Paul for posting the pictures , very helpful , can you leave them there for about 10 years !!!

picture of todays effort .

Holy -----!

(holey wheels of course, whadya think I meant?)

Looking good Jeff!

I have read the original articles, and have the research material, but I am puzzled by the exact detail of the roof-mounted cooling arrangement. The published drawings for the model seem to me to represent this incorrectly, or at least too simplistically for my taste. Do you know of any really good photos or drawings which show full detail of the coolers?

Marcus I don't have any information about the original cooling system . The model was an experiment in ic powered locomotives and only needs a simple cooling system i.e an evaporative approach is fit for purpose in the model .

Jeff, my loco uses a 25cc brushcutter engine. I've retained the centrifugal clutch and built a tumbler reverse unit to provide the change in direction. Provided you work out the gearing to match your desired maximum track speed with your desired maximum engine RPM then that might work ok, but i don't know if you could graft a similar centrifugal clutch onto your engine?

The loco is a complete published design complete with centrifugal clutch and infinitely variable forward and reverse gear , all of this needs making . the design was published in the Model Engineer in a series running from 1941 to 1943 with a few odd issues after that . Should keep me busy for a while .

Sounds like the design is well sorted, hope it comes out as good as you expect.

How's the 1831 loco coming along Jeff?