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Nilgiri X class, Indian rack loco


Nicktoix
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I've been fascinated by this loco since first seeing it on TV. After alot of research and a site visit last January I have at last got on with building the model.

It is built from my own etches.

BUT what is it  ???  I'll tell you it is metre gauge and not European so suggestions welcome. It is 7mm.6.jpg.a84c7a76a9498cb1714ee07c4ca91223.jpg

 

Basic chassis

 

5.jpg.dcc22dd299728791a5ac59944afe0539.jpg

 

Not much room and these flanges have been turned down !!

 

4.jpg.2f917c97c76ba2f13fc309e9cc517f71.jpg

 

What does this suggest ?

 

3.jpg.a4c56e45e85dd2e1d09bcdb85bec3599.jpg1.jpg.349ec539bda282a022f1e6023a85d8f1.jpg

 

Waiting for the boiler so he can fire up.

 

NIck

2.jpg

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20 minutes ago, Nicktoix said:

I've been fascinated by this loco since first seeing it on TV. After alot of research and a site visit last January I have at last got on with building the model.

It is built from my own etches.

BUT what is it  ???  I'll tell you it is metre gauge and not European so suggestions welcome. It is 7mm.6.jpg.a84c7a76a9498cb1714ee07c4ca91223.jpg

 

Basic chassis

 

5.jpg.dcc22dd299728791a5ac59944afe0539.jpg

 

Not much room and these flanges have been turned down !!

 

4.jpg.2f917c97c76ba2f13fc309e9cc517f71.jpg

 

What does this suggest ?

 

3.jpg.a4c56e45e85dd2e1d09bcdb85bec3599.jpg1.jpg.349ec539bda282a022f1e6023a85d8f1.jpg

 

Waiting for the boiler so he can fire up.

 

NIck

2.jpg

South African? Looks like a Mallet? Statfold Barn has one but yours has a bunker not a tender?

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Correct !!

Nilgiri X class. 4 cylinder compound hp cylinders driving rail wheels and lp cylinders driving the rack.

Originals built by SLM but converted to oil burning. Another 4 were built in India, all oil burners. There are plans to build a coal fired one in India.

This is not going to be a quick build I expect it to take a year along with other projects.

It will be DCC controlled with each motor independent. 

Nick

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5 minutes ago, Nicktoix said:

Correct !!

Nilgiri X class. 4 cylinder compound hp cylinders driving rail wheels and lp cylinders driving the rack.

Originals built by SLM but converted to oil burning. Another 4 were built in India, all oil burners. There are plans to build a coal fired one in India.

This is not going to be a quick build I expect it to take a year along with other projects.

It will be DCC controlled with each motor independent. 

Nick

 

That's some project! I look forward to following progress.

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IMG_0375.JPG.16671531ee03555b74a93d73f2267259.JPG

 

This is an oil burner at Coonor last year. They have an extended smokebox and bunker along with the camel hump which is the fuel tank. I believe they are the largest rack locos in Asia, world wide the Meyer-Kitson in South America are much larger.

NIck

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  • Nicktoix changed the title to Nilgiri X class, Indian rack loco
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I will be following Nick, having seen the inception develop down at the LMRS club I thought it best not to comment on the "what is it ?" quiz. I don't usually like foreign locos but for some strange unknown reason I quite like Indian stuff and have a couple of DVDs on the subject.

 

Looking forward to the updates.

 

Regards,

Ian. (3mm)

Edited by 03060
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The Nilgiri is a fascinating railway and I had a trip on it in 2009. The locos are impressive beasts and coal firing on steep gradients in small tunnels must be challenging. I can understand why oil firing is attractive although I am not sure how successful it has been. 

805928183_9MarchMettupalayamstation6.JPG.d368eb9eebbfc76d0c731f6630de2bb4.JPG  1611764207_9MarchtriptoOoty29.JPG.0b7fb0bdb8d834ed1ca59dfcc4da2e14.JPG1910584285_9MarchtriptoOoty46.JPG.9348abc9ac3ae556ae1e0faf39d9e2f7.JPGAt Coonoor our steam loco handed over to a diesel for the easier part of the trip. Burning bio-fuel, the diesels managed to make almost as much smoke. 

One of the oil burning steam locos was on shed at Coonoor but the Improved Engine Green livery did not really suit it....

1935264842_10MarchCoonoor08.JPG.28e3dd4e9e31a16a7c78189b3524e5db.JPGBest wishes 

Eric   

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  • 1 month later...

Slow progress.

20210226_201855.jpg.52c65fd356596119215a873318a4f0f1.jpg

 

This is the rear end with the brake cylinders which are  3d printed.20210226_201813.jpg.e04701c9375dc31ccd33e5aa8f78f922.jpg

 

Next I fitted the track wheels and gears. The whole lot have to quartered and the rack pinions synchronised with each other and the rack. I did this by soldering a length of rack to the pinions and making all the adjustments. The white gears are "nylonish" glued to the shaft with Loctite 480. I hope I never have to take it apart.20210227_160059.jpg.ecba77d75237ab586b7fef02143290f1.jpg20210226_201826.jpg.91ef6a9b41056e6ae3f3ec6dca7d6445.jpg

 

I am waiting for a new set of etches for the cylinders so have made up the expansion links meantime. 20210301_193510.jpg.d51031f910cd0e1a39f5684073292420.jpg

 

Two different types. The pivots are silver soldered on first and then the rest built up from etches. They took about 2 hours in total

Slow but steady.

Need to go and lie in a dark room now

Nick

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  • 5 months later...

And now the "dangly bits" aka valve gear. Quite tricky as the clearances are tight and you have to do it in the right order.

1624213571518.jpg.40c5f39c790bd7af209b8832f6c5e714.jpg

 

LP set on the left side fitted. The piston rod is temporary fitted and won't be permanent until the cylinder covers and glands have been fitted . The glands will be resin 3d prints.

1627720121672.jpg.932bab4ec41685b9aa4772f5a20acc30.jpg

 

The HP valve gear fitted. I made a mess of the drop link on the LP crosshead and had to fit a patch. I had theh crossheads and valve guides cast in brass..1627720057191.jpg.26a4a7ec42bc0aa80c17dafa8c2e07f1.jpg

 

The full set fitted on the right side with lessons learnt from the left side. A degree of surgery was required to the motion bracket to get alignments and clearances.

Now to get it running freely and tidy it up.

Nick

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Cylinders now finished with 3d prints for glands and front cylinder covers

1630003293772.jpg.7b193e937de19095c8d50df98843b20e.jpg1630003293775.jpg.b937ad21c9e5f79fe04c284201372dc1.jpg

 

Just got the pony truck and cowcatchers to finish on the chassis then it's onto the body.

Having said that I think I'll have a rest and do summat else for a bit. This has been taxing

Nick

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  • 3 months later...
  • 5 weeks later...

I visited the line in 1987 and being a BR driver at the time got priv rate tickets everywhere, and the international staff pass got me a couple of footplate rides on the Nigiri. One was from Conoor to Ooty and another back down to Conoor, both on steam. there were no visible diesels then, and no oil firing.

 

I've posted pictures of my visit on here in the "Railways of Asia" group further down

 

The coaches were built by Ashbury in 1936. In the back of the loco shed was a diagram of the complex valve gear dating back "a long time". good luck o this project.

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  • 2 weeks later...

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