Search found 75 matches

by K. Brouwers
Mon Jun 01, 2020 11:21 pm
Forum: Live Steam
Topic: how to design an axle pump in 3/4 scale
Replies: 14
Views: 519

Re: how to design an axle pump in 3/4 scale

Hello Squandit,
Have look here:

http://www.ibls.org/mediawiki/index.php ... ering_Data

This book contains a wealth of information on locomotive mechanical design page 15 talks about steam consumption and pump sizing.
Happy building :D
Karel
by K. Brouwers
Wed May 06, 2020 2:38 pm
Forum: Grand Scale Railroading
Topic: Drive Wheels for 12" gauge
Replies: 4
Views: 558

Re: Drive Wheels for 12" gauge

Hi Marty, That makes it more complicated, could you turn the fly crank thinner with a boss that would press into the wheel and press the axle into a smaller hole in the fly crank. that would also give you the counterweight with a little re profiling. Grabbing at straws perhaps castings would be easi...
by K. Brouwers
Wed May 06, 2020 11:28 am
Forum: Grand Scale Railroading
Topic: Drive Wheels for 12" gauge
Replies: 4
Views: 558

Re: Drive Wheels for 12" gauge

Hi Marty Would it be possible to attach a counterweight with a boss for the crank pin to the wheel you have ? I am willing to make a pattern and have some cast for you but I think it might be a while before you might have them due to the current health emergency. :cry: . Ocean shipping cost should b...
by K. Brouwers
Tue Apr 28, 2020 2:07 am
Forum: Live Steam
Topic: CliShay/Big Bertha question
Replies: 15
Views: 1724

Re: CliShay/Big Bertha question

Hi Scotty, Until the cylinders are warmed up you will have condensation in the cylinder. If there will be enough enough to cause a problem I can not say for sure. A slide valve engine will force condensation past the valve where as a piston valve engine might be damaged. Since you are making your ow...
by K. Brouwers
Tue Apr 14, 2020 2:33 am
Forum: Live Steam
Topic: Extended Piston Rod
Replies: 4
Views: 1100

Re: Extended Piston Rod

Hello everyone. Extended Piston rods were very common in Europe and also stationary engines. The front of the piston did have a bushing that supported the extended piston rod. I just did a quick back of the envelope calculation of a 20 inch piston and it would weigh in the neighborhood of 175 lbs th...
by K. Brouwers
Mon Apr 13, 2020 9:00 pm
Forum: General Discussion
Topic: How would you finish this bore?
Replies: 19
Views: 2296

Re: How would you finish this bore?

Hello Greg, Perhaps an adjustable lap might serve.. It would need to be softer than your bushings to minimize grit embedding in your bushings. .maybe some aluminum would suffice. https://www.kemet.co.uk/blog/toolroom/cylindrical-lapping-using-helilaps-technical-article https://www.youtube.com/watch?...
by K. Brouwers
Wed Mar 25, 2020 2:20 am
Forum: Live Steam
Topic: Was there ever a NG SW1 or 1200?
Replies: 19
Views: 3971

Re: Was there ever a NG SW1 or 1200?

Good afternoon, While not a GM locomotive the South African Railway two foot gauge diesels have an older style car body. Built as Two foot gauge engines I am sure they could be adapted to 2.5 inch scale a few were fitted with 42 inch gauge trucks.. But just think how they would look in 3.75 inch sca...
by K. Brouwers
Tue Mar 17, 2020 8:49 pm
Forum: Grand Scale Railroading
Topic: New build..But not yet
Replies: 19
Views: 6725

Re: New build..But not yet

Sorry I neglected your useful information.. Yes I saw that also... Finding it here might be the problem... In my research of the virus I have found it can cause severe diarrhea this can lead to dehydration and that can cascade into far worse problems so drink plenty of water and perhaps purchase a f...
by K. Brouwers
Tue Mar 17, 2020 8:42 pm
Forum: Grand Scale Railroading
Topic: New build..But not yet
Replies: 19
Views: 6725

Re: New build..But not yet

Hi Glenn, Thank you for your concern. My family and I are fine here. Life goes on. We are restricting outside contact. I do go to work to keep the home fires burning and to make sure my people are OK. We live outside of the city about 50 miles so we are not packed in like sardines and luckily none o...
by K. Brouwers
Tue Mar 10, 2020 5:59 am
Forum: Grand Scale Railroading
Topic: New build..But not yet
Replies: 19
Views: 6725

Re: New build..But not yet

Hi Glenn, I am very happy with the castings. The size compared to the Sweet William 7 1/4 gauge engine I had done at the same time was surprising. Of course I knew they would be bigger but having them side by side was telling. I will need to make a few metrology tools before I can make a real start ...
by K. Brouwers
Mon Mar 09, 2020 11:11 pm
Forum: Grand Scale Railroading
Topic: New build..But not yet
Replies: 19
Views: 6725

Re: New build..But not yet

Hello Friends,
How time fly's. I put a kit together for the truck build I hope to share. I have also done a bit of preparation of the parts...
IMG_9415.JPG
I wanted to show everything in its rough state but i just couldn't help myself, impatience got the best of me. :D
Cheers
Karel
by K. Brouwers
Sat Feb 15, 2020 7:18 am
Forum: Riding Scale Railroading
Topic: Rail car construction
Replies: 14
Views: 3886

Re: Rail car construction

Hello Friends, I know it is not prototypical as all the wooden cars were held together with tensioned rods running along the wooden members that were put under compression to hold the mortise and tenons together but for models if the joints are not quite perfect fits a mixture of epoxy and fine sawd...