Roundhouse 2016

Keith S · Post by **Keith S** » Sun Oct 30, 2016 12:31 am

There was someone on this forum who did it, and posted some pictures, but I'll be darned if I can find it. The Roundhouse Hackworth valve gear normally uses inclined cylinders, but I think it would probably work with the normal ones, maybe better in one direction than the other once it's set up?

A search online for "Roundhouse Bertie with Hackworth valve gear" brings up a picture of a blue one.

DLRdan · Post by **DLRdan** » Sun Oct 30, 2016 8:38 pm

That would be mine, can't find the pictures of it right now but Brian took some about 2 days after it was finished here

http://bgra.16mm.org.uk/gallery5.html

There is also a video of it running here

https://www.youtube.com/watch?v=o-jm2eGQCgQ

The valve gear is in theory better in one direction than the other, in practice it runs perfectly well in both directions. As far as I know there are 3 locos with hackworth, Andy Bell did the first, mine was second and the other is red from one of the southern groups.

EDIT: Just found a short video that Andy did of his Bertie which does use the RH parts.

https://www.youtube.com/watch?v=ghaSv6QLoDg

dougrail · Post by **dougrail** » Sun Oct 30, 2016 8:48 pm

Are you able to replicate this?

DLRdan · Post by **DLRdan** » Sun Oct 30, 2016 8:51 pm

Going to be completely honest, I have no idea. However as the current set of rods is ready for replacing I think its time I found out.

GTB · Post by **GTB** » Mon Oct 31, 2016 5:41 am

DLRdan:120690 wrote:Going to be completely honest, I have no idea. However as the current set of rods is ready for replacing I think its time I found out.

Dan,

Out of curiosity, how did you remove the driving wheels to get at the slip eccentrics?

The wheels on a RH basic chassis look like they are locked in position on the axle with a roll pin in a blind hole, which wouldn't be easy to extract.......

Regards,
Graeme

TonyW · Post by **TonyW** » Mon Oct 31, 2016 9:14 am

Two things...

I understand that Roundhouse no longer supply Hackworth valve gear sets.

Although they have tiny grub screws (not roll pins) the wheels on Berties and Millies are pressed on to the axle. They are difficult to remove and even more difficult to replace as correct quartering has to be achieved during the latter process.

DLRdan · Post by **DLRdan** » Mon Oct 31, 2016 12:44 pm

GTB:120699 wrote:
Out of curiosity, how did you remove the driving wheels to get at the slip eccentrics?

I cheated and asked Roger at Roundhouse very nicely to do it for me, he also put the wheels back on.

GTB · Post by **GTB** » Mon Oct 31, 2016 1:57 pm

TonyW:120700 wrote: Although they have tiny grub screws (not roll pins) the wheels on Berties and Millies are pressed on to the axle.

Thanks,

You're right, with enough light and magnification, they are M2.5 grubscrews.

Pressed on wheels isn't an issue. I have a quartering jig and access to a 20 tonne press, if the 1 tonne arbor press isn't up to the job.........

Hackworth gear doesn't float my boat any more than slip eccentrics, but inside Stepho gear does.

Graeme

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