5" Bulldog rebuild

[drew356]

Hi Guys
I'm a complete novice when it comes to model locomotive engineering, so I'm going to need all the help I can get from you all.
I have acquired  a 5" Bulldog project, it's very well made but needs a lot of love to get it working.
By the way if anyone recognises it please let me know as I would love to know who the original model engineer was.
Anyway here are some pictures of the Bulldog as I found it, poorly hand painted and covered in rust and swarf.





It's to the Keith Wilson design, I was lucky to get a full set of ME build articles with the loco I have also purchased a set of drawings.
Unfortunately I don't have a tender or boiler, I am thinking of investing in a tender kit from Polly Engineering when they are fully back up to speed, I have booked a slot with Paul at Southern Boiler Works so hopefully will have saved enough cash to pay for it next year.

Geoff has mentioned that there are a few errors in Keith’s design the main one being the valve gear so does anyone know if there is an easy way to tell if the original builder has modified the valve gear?

OK so here is the progress so far…
The outer frames were only held on with a few screws so I have dismantled the loco and started to clean off the old paint.





I have also built a display track and started to re-build the loco with new fasteners.





I am really looking forward to getting this loco steaming but I will have many, many questions as I progress.

Cheers
Drew

[gwrfan]

Hi Drew.

I have sent you a Message on this site.

Do be careful with hole sizing. The person who built my chassis drilled all the holes the same size! Some of them have to be of a larger diameter and I have been struggling to enlarge said holes due to the inside and outside frames being rivited together. You will also find when you do the brake rods that the rear rods end up behind the rear step but Keith Wilson does not show, or say, how the ends are secured! And he doesn't describe the ashpan construction and fitting until, I think it was, June 1984, some 2 years after he completed the build articles.

Geoff

[ettingtonliam]

Have you tried looking through the 'Errors on Drawings' section of this site? Theres about 15 pages, and on the second page there is mention of errors in Dukedog valve gear. I didn't have time to look further than the second page, maybe theres more?

[dscott]

YES, there are many mistakes but you have to remember that the Model Engineer was desperate for designs at the time so the pressure was on.
At the same time Keith was deeply involved in building 5 Kings and 2 Castles in 7 1/4.
Plus putting up with many teenage kids some of which learnt Boiler making, Design Engineering, Computer programming, being a superb Mother etc.
And to think we are all hitting RETIREMENT at the same time.

My two are sat under benches while I get into the 19th year of my second marriage.
TWO yes a solution to the throw of the eccentrics and changing the ports on the Bulldog cylinder when I get round to machining it. The Bulldog one goes into the Duke with its wavy frames.
Reeves did a super saving package back when I started my first relevant job at Thorn Lighting in the R and D workshop.1987.
I had to go and collect from the stand at Birmingham University Exhibition.

David and Lily.

[drew356]

Hi Guys
Thank you for all your suggestions and advice, I fully appreciate that mistakes in drawings happen and I will have to investigate the valve gear, but that will be later down the line on this re build.

I have fitted the outer frames temporarily and the plan is to bolt these on from the inside so that I can remove them in the future to fix any mistakes and for final painting.




My next challenge is the springing, I am going to try and bend the Tufnol leaves to the correct contour by heating them in the oven. I have also received some spring links from Model Engineers Laser these will need some milling to get the correct profile but as there are 32 of them the laser cut blanks will save me a whole load of filling.



Hi David and Lily. I would love to see pictures of your Bulldog projects.

Cheers
Drew

[drew356]

Merry Christmas to you all.
Santa has come through with a collection of castings to get me started on the smokebox.
I am going to need some help as I've never turned a gun metal casting before but my dads old ML7 should do the job.



Not much going on with the Bulldog as it's just too cold in the workshop.
I have managed to sort out the bogie suspension, coupling hook and the GWR screw link.





Next up will be completing the main loco suspension.
See you all in 2024
Drew

[davewoo]

Looking good Drew, watching this with interest, keep up the good work.

Dave

[drew356]

Thanks Dave for your kind words.
On with the Bulldog...next up the front valance plates and running boards, lots of dummy rivets and some small head 10BA bolts to hold them all in place.



I have a slightly embarrassing question...I am moving onto fabricating the splashers and I can't find any pictures of real locos or 5" models that show if the splashers are open on the inside or enclosed.
I am thinking of going with brass for these and soft soldering them together but any advice would be very welcome.
Regards
Drew

[noggin]

Have a look at a site called GWR modelling, you will find some pictures on there, I have some good books i shall put the titles up for you later that show some good images. As for the splashers the full size would not have the back open they would be whole, It does not matter on model form, most would leave the back of the splasher open, I would silver solder mine together but others would soft solder them, up to you. and yes brass is o k, Have a look at MODEL ENGINEERS LASER they may do them laser cut, that will save time , You may need to profile the splasher tops when you have the boiler and other parts fitted as well. Hope this helps a bit other will share their ideas as well i expect.
Garry