Roundhouse Katie Kit build

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Chris_AS
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Roundhouse Katie Kit build

Post by Chris_AS » Tue Jul 20, 2021 10:18 pm

Somewhere in lockdown 1, having saved a lot of time from not having to commute, I decided I needed a hobby / something to do. After messing about with an MSS meths fired loco kit for a bit, it became clear a bigger project was needed. Money saved on commuting was therefore directed to a Roundhouse Katie kit.
IMG-20200611-WA0000.jpg
I'm creating this thread to show some of the work involved for anyone else considering this step, as well as somewhere others can ask for help. I read quite a bit on this forum during the build for pointers / tips on the various things involved.

The TLDR is it's a lot of fun, and extremely satisfying, to build your own loco. I think as long as you have a reasonable level of diy skill (I'd never done anything like this before) and can follow instructions + are willing to 'give things a go', its not particularly difficult.

Starting points is to screw the frames together - very easy, every part seems (to my untrained eye) beautifully machined and accurate.
IMG_2.gif
Tip: Get yourself a small jar with a lid to keep screws, small parts (and tools etc.) safe as you take them out of the bags they come in.

(creating this first post with the picture attachments took longer than I planned - more to come in the next few days)
Last edited by Chris_AS on Wed Jul 21, 2021 8:52 am, edited 1 time in total.

Garethh
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Re: Roundhouse Katie Kit build

Post by Garethh » Wed Jul 21, 2021 6:45 am

Looking forward to seeing how this progresses, my first (only thus far) live steamer was a roundhouse kit build and I thoroughly enjoyed the process!

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Re: Roundhouse Katie Kit build

Post by georgesheppard » Wed Jul 21, 2021 3:20 pm

I was thinking of adding a Roundhouse kit build to my ever growing list of projects, looking forward to seeing how your build progresses!

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Re: Roundhouse Katie Kit build

Post by steveh99 » Wed Jul 21, 2021 8:19 pm

I built one of these some time ago. It's very easy and straightforward except for one small detail. The return crank needs to be set at 45 deg and then pinned in position. I wasn't brave emough at first to drill and pin the crank pin so just relied on doing up the clamp screw as tight as possible. All worked fine at first but it gradually moved, I think because I used it a few times to turn the wheels. Once it moves out of 45deg the valve timing goes to pot. Eventually I tried drilling the crank pin as per instructions to fit the supplied roll pin, but the drill wandered when it hit the crank pin and upset the 45 deg again so I gave up. It would be helpful if Roundhouse sold this part pre drilled and/or with return crank fitted. I will be intersted to see how you get on with this. Everything else is a piece of cake.

Chris_AS
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Re: Roundhouse Katie Kit build

Post by Chris_AS » Wed Jul 21, 2021 9:25 pm

steveh99 wrote:
Wed Jul 21, 2021 8:19 pm
I built one of these some time ago. It's very easy and straightforward except for one small detail. The return crank needs to be set at 45 deg and then pinned in position. I wasn't brave emough at first to drill and pin the crank pin so just relied on doing up the clamp screw as tight as possible. All worked fine at first but it gradually moved, I think because I used it a few times to turn the wheels. Once it moves out of 45deg the valve timing goes to pot. Eventually I tried drilling the crank pin as per instructions to fit the supplied roll pin, but the drill wandered when it hit the crank pin and upset the 45 deg again so I gave up. It would be helpful if Roundhouse sold this part pre drilled and/or with return crank fitted. I will be intersted to see how you get on with this. Everything else is a piece of cake.
Completely agree Steve. That was easily the worst / most difficult part of it. At the very least the return crank itself could be pre-drilled by Roundhouse so the drilling would be limited to putting a drill bit through the pin. I managed to do one side, but broke a couple of drill bits doing so and lost confidence to do the other side. Ended up as you did with just tightening the screw on the other side, and added a little glue to the nut for good measure.
img3.gif

Chris_AS
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Re: Roundhouse Katie Kit build

Post by Chris_AS » Wed Jul 21, 2021 9:46 pm

The painting starts early on in the build - really once the frame is together you'll need to start on this.
I also started on the body kit at this point so I could do most of the painting all together. Roundhouse have made the folding of the body parts very simple, and at the risk of repeating myself, quality of the parts is high. A little soldering is required for the tabs that hold the servo bracket in place.
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I followed the painting method described here (http://www.gardenrailwayclub.com/worksh ... e-easy-way). My tips here are to prepare well and spray in the shortest bursts you can manage. And then don't touch for longer than you think (everyone makes this mistake at least once I guess!). Blu tack is really useful to shield the places you don't want paint to go (axle bearings, boiler openings etc.)

Here's some parts heading into the oven - wait until your significant other has gone out for this bit :thumbup:
img4.gif

11thHour
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Re: Roundhouse Katie Kit build

Post by 11thHour » Thu Jul 22, 2021 6:17 am

2 tricks to try on the return crank
Use a saw to continue the slot onto the other side of the crank pin opening, this allows the crank to tighten down harder without distorting the shape of the crank pin hole and with less force from the nut/bolt.
Substitute the Roundhouse nut and bolt with a stainless Allen key style bolt. These are hard to find ( I think you need 2.5mm, but check) but they are out there. The Allen key is easier to use and ensure the bolt bites down to the correct position, because once the standard Roundhouse slot goes badly out of parallel the gripping force on the pin diminishes.

Tim

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Re: Roundhouse Katie Kit build

Post by -steves- » Thu Jul 22, 2021 10:08 am

I cheated when I built my Katie, I done everything except the pinning. For this, I went back to Roundhouse, presented them with my work of art ( :lol: ) and they for a small sum of money, they timed, drilled and pinned it for me. It is SUPER smooth and I am glad I let them do that part, it's a one chance thing to get right :thumbup:
The buck stops here .......

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Chris_AS
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Re: Roundhouse Katie Kit build

Post by Chris_AS » Thu Jul 22, 2021 1:24 pm

-steves- wrote:
Thu Jul 22, 2021 10:08 am
I cheated when I built my Katie, I done everything except the pinning. For this, I went back to Roundhouse, presented them with my work of art ( :lol: ) and they for a small sum of money, they timed, drilled and pinned it for me. It is SUPER smooth and I am glad I let them do that part, it's a one chance thing to get right :thumbup:
Haha - I'm keeping that idea for if I do another one (likely to be a Lady Anne).

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Old Man Aaron
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Re: Roundhouse Katie Kit build

Post by Old Man Aaron » Fri Jul 23, 2021 1:20 pm

11thHour wrote:
Thu Jul 22, 2021 6:17 am
2 tricks to try on the return crank
Use a saw to continue the slot onto the other side of the crank pin opening, this allows the crank to tighten down harder without distorting the shape of the crank pin hole and with less force from the nut/bolt.
Substitute the Roundhouse nut and bolt with a stainless Allen key style bolt. These are hard to find ( I think you need 2.5mm, but check) but they are out there. The Allen key is easier to use and ensure the bolt bites down to the correct position, because once the standard Roundhouse slot goes badly out of parallel the gripping force on the pin diminishes.

Tim
Had to do the same on my Fowler kit, couldn't even do initial rough timing setup before that. Those M2.5 screws are easy to find (and cheap) on Evilbay.

Nice to see some painted wheels, Chris! :thumbright: Cylinders are just as easy to do at this stage - just don't use paint that needs the oven to cure, or you'll melt the o-ring seals. ;) Looking forward to seeing the loco come together.
Regards,
Aaron - Scum Class Works

Chris_AS
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Re: Roundhouse Katie Kit build

Post by Chris_AS » Tue Jul 27, 2021 8:35 pm

A satisfying early win is fitting the decoration to the smokebox. I was really pleased with the look here. Used BBQ paint.
smokebox.gif

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Re: Roundhouse Katie Kit build

Post by -steves- » Tue Jul 27, 2021 8:55 pm

Looks absolutely great :thumbup:
The buck stops here .......

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http://peterborough.16mm.org.uk/

Chris_AS
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Re: Roundhouse Katie Kit build

Post by Chris_AS » Tue Jul 27, 2021 8:56 pm

I added the running boards available from locoworks, and used the Lady Anne shape for the front buffer (U-shape rather than oval). I like the look of the boards but for the price I must admit I was expecting slightly thicker brass than you get - they feel a bit flimsy in the hand although that is obviously much less noticeable once they are fitted. Cylinder covers and buffer overlays were also added for cosmetic reasons.
running boards.gif
Putting together the coupling rods and bits was straightforward by just following the instructions closely. A little work with the needle files and everything was running very smoothly. Extremely satisfying to push up and down a length of peco track at this point!
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Bending the steam exhaust pipes was tricky for me as you don't have a guide for the shape and they have a tendency to come unscrewed from the cylinder whilst trying to manipulate them. Got close enough at this point and then managed to rig up a system with an automatic tyre pump to get it running on air.
IMG_20200628_215456460.gif

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