Single occilating cylinder loco?

LnBmad · Post by **LnBmad** » Fri Dec 27, 2013 4:52 pm

DaveWatkins:94403 wrote:Best of luck with Louisa. If you can find any reference to John Foulds's loco they might help with your project - he built quarry Hunslets in 16mm scale driven by a single cylinder oscillator.

Unfortunately I can only find reference to john on your website dave. Do you have any more info on his hunslets?

DaveWatkins · Post by **DaveWatkins** » Fri Dec 27, 2013 5:11 pm

I have found the reference I was thinking of - a single page article in SMT No 36, May 86. At the time of the article he had built ten small Hunslets. He describes how he started with a Mamod cylinder, progressed through larger cylinders and various forms of geared drive, finishing with 1/2" bore x 1/2" stroke with direct drive.

Dave

LnBmad · Post by **LnBmad** » Fri Dec 27, 2013 5:20 pm

I shall find out the drawings for the frames and see what I can fit

Busted Bricks · Post by **Busted Bricks** » Fri Dec 27, 2013 6:22 pm

I really like this one:
http://www.youtube.com/watch?v=PmTrKjYvmr0

Charles M · Post by **Charles M** » Fri Dec 27, 2013 7:00 pm

Here is a video of my single cylinder oscillator running .

http://youtu.be/s_r1doDEak4

Charles M

steamyjim · Post by **steamyjim** » Fri Dec 27, 2013 11:41 pm

DaveWatkins:94405 wrote:Oops

This should be the Sentinel:-

http://www.youtube.com/watch?v=w79KRqOYg-o

Those two locos look brilliant! Have you any further details on the De-Winton and the Sentinel?

DaveWatkins · Post by **DaveWatkins** » Sun Dec 29, 2013 5:08 pm

Here are a few photos of the DeWinton. It is decidedly overscale for 16mm scale but would look ok in 7/8ths. The cylinder was originally single acting and later converted to double acting. It wore out it's first set of gears, I don't know where they came from but the larger gear had 'Primus' embossed on it. The new gears came from Meccanoman.co.uk . I wrote up some of the trials and tribulations in getting it going in SMT 28. The less said about the boiler the better - the brass shell was once part of a fire extinguisher - don't do this - use copper tube!

DaveWatkins · Post by **DaveWatkins** » Sun Dec 29, 2013 5:25 pm

The Sentinel was based on a very small drawing I found in a book on Sentinel Locomotives in the local public library. I used a single acting oscillator geared down 4 to 1 with a heavy flywheel. The flywheel is on a cross shaft which in turn is linked to the axles with chain.

It uses Meccano sprockets and chain. This chain is flimsy stuff, stretches like billy-o. I have it on the to do list to replace it with either delrin chain or if I am feeling rich a roller chain.

The boiler is meths fired with a single flue and an outer casing which allows heating the outside of the boiler as well as through the flue. The burner has two wick tubes.

I can't immediately find a photo showing the works other than this small image from long ago.

INJIN · Post by **INJIN** » Mon Dec 30, 2013 8:22 pm

steamyjim · Post by **steamyjim** » Mon Dec 30, 2013 9:16 pm

Dave, thank you for the information on the De-Winton and the Sentinel - they are very neat little locos. I might have a go at something similar to the Sentinel some time soon, as I have always liked those locos.

INJIN (I don't know your real name), the Hunslets are very nice - did you build them?

LnBmad · Post by **LnBmad** » Mon Dec 30, 2013 11:07 pm

That pair of hunslets look great! What size cylinder do the run?

INJIN · Post by **INJIN** » Tue Dec 31, 2013 10:37 am

steamyjim:94593 wrote:Dave, thank you for the information on the De-Winton and the Sentinel - they are very neat little locos. I might have a go at something similar to the Sentinel some time soon, as I have always liked those locos.

INJIN (I don't know your real name), the Hunslets are very nice - did you build them?

No they are "John Foulds" Hunslets.

I will ask his son next time I see him for the details of the two in the pix I posted. 'Could be sometime though.........

LnBmad · Post by **LnBmad** » Wed Jan 01, 2014 7:54 pm

Today gave me chance to look at cylinders and space in the frames. It turns out that the biggest cylinder I can fit in the frames is 1/4" bore 1/4" throw. This was going to present a problem until a wonderful guy at bsme suggested using the frames as port faces! This created a whole load of space that could be used to fit a second oscillator. So tonight is drawing it all out (maths already worked out just need to mark where holes are to go) and then it's hopefully to the workshop this weekend!

SteveC · Post by **SteveC** » Sat Aug 09, 2014 12:29 pm

Love the idea of an oscillator. When I get my new workshop up and running I could well look into it. A couple of years ago I came across a big box under a table at an antiques fair, full of Mamod bits. I didn't haggle over the £20 asking price. Result was that I was able to rebuild a traction engine, two road rollers and two stationary engines (all working , with a load of bits left over, including 2 boilers, three pistons & cylinders.

LnBmad · Post by **LnBmad** » Sun Aug 10, 2014 7:57 am

I eventually went with 2 single acting oscillating cylinders. Here the work so far

kandnwlr · Post by **kandnwlr** » Sun Aug 10, 2014 8:28 am

I´ve got a Peter Angus Single Fairlie powered by two vertical oscillating cylinders. It must be going on 20 years old but works at low speed beautifully and pulls a large number of carriages without problems.

Dr. Bond of the DVLR · Post by **Dr. Bond of the DVLR** » Sun Aug 10, 2014 9:59 am

If you are using two single actings ossies - have you put the cranks at 180 degrees?

LnBmad · Post by **LnBmad** » Sun Aug 10, 2014 11:04 am

Cranks are yet to be fixed but will be at 180

Keith S · Post by **Keith S** » Sun Aug 10, 2014 4:42 pm

You've done well capturing the proportions. I really like it. Should be a nice simple little engine with a great deal of character.

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