Building the Pumpjack

[tel]

It's a good design Brian, and 'things to drive' are always in demand - you should have no trouble getting some builders for it.

 

[Brian Rupnow]

One final bit of information, for anyone who considers building a pumpjack, using the gears which I specified. The "optimum" center to center distance for the two small pinion gears seems to be 0.355". The center to center distance on the large 72 tooth gear and the small pinion gear driving it is 1.317", and the overall ratio from the steam engine driving to the counterweight shaft works out to about 18.5:1----Brian

 

[tel]

Thanks Brian, tho mine will be a bit different - I've got the same big gear, but a 9t pinion and a 14t idler wheel. The ratio will be somewhat lower and the centres different.

On another note, that wire 'rope' I have is looking promising, the trick is to kink it where it goes around the post, and then kink both legs downwards, up close to the first kink - looks to be riding the grooves well with very little weight applied.

 

[SAM in LA]

Brian,

I found this pump jack today and thought you might like to see it.

http://www.timberkitsus.com/shopexd.asp?id=25

I do not have any ties to this company, just sharing this novelty.

SAM

 

[Brian Rupnow]

Thanks Sam---thats cute!! Tel--what progress are you making on yours?--Brian

 

[lathe nut]

Brain good to hear from you, know that you are busy that is good for food, lights and a happy woman but don't forget about us, take care, Lathe Nut

 

[pickstock]

got directed to this post by another, looks really good.
might try and do it when i get around to it

 

[Brian Rupnow]

There has been a flurry of interest in this pumpjack article I did a few years ago, so I am posting here to bring it forward for all those who expressed an interest.--and here is a link to a download of all the drawings.
http://www.mediafire.com/download/zhdukxw2ef2/PUMPJACK_PDF_FILES.ZIP

-Brian---June--2015

 

[Jyman]

Thanks Brian,

It truly is a beautiful model, its definitely on my list of models to make. and being out here in Alberta it's just like watching the real thing.


Jonathan


Sent from my iPhone using Model Engines

 

[jimjam66]

Thanks Brian - yet ANOTHER on my 'must try' list. Given how long the list is getting I may not trouble you with it for another decade or so!

 

[Brian Rupnow]

There has been a bit of interest shown lately in this build, and it seems that all of the old videos are missing. I took this down off a shelf this morning and made a new video of it running. It's a bit dusty, but other than that it runs as good adss the day I finished it.---Brian
[ame]https://www.youtube.com/watch?v=ObAfMrkiif8&feature=youtu.be[/ame]

 

[jimsshop1]

Hi Brian,

Somehow I found this thread. I have been in the oil business for 15 years now and am retiring at the end of this year and hope to continue building engines in my small shop. Would you happen to still have these plans for the pump Jack? I have always wanted to build one and I really like the way yours turned out.

Respectfully,

Jim

 

[Brian Rupnow]

Hi Brian,

Somehow I found this thread. I have been in the oil business for 15 years now and am retiring at the end of this year and hope to continue building engines in my small shop. Would you happen to still have these plans for the pump Jack? I have always wanted to build one and I really like the way yours turned out.

Respectfully,

Jim

email me at [email protected] and identify yourself and what you want. I will send you the plans.---Brian