Cogsy's Rupnow Vertical

[Cogsy]

I'm finally calling my Rupnow Vertical finished so I thought I'd make a rare post (for me) in the Finished projects area. I abandoned the idea of mounting a fan for now and I still have to attach some rubber feet to the base but otherwise it's complete.

Here's some pictures of how it turned out, plus a video of it running pretty well now. At about the 1:45 mark I hand start it for the first time ever and it idles super slowly for me. As I suspected it is quite a well balanced engine and the vibration you can hear is mainly because of the 1/4" table top with virtually no supports flapping about. With some rubber feet and a sturdy table I think it'll happily sit in one place and run all day long.

[ame]https://www.youtube.com/watch?v=dRmc6s-I2Co[/ame]


Now for a big long wait til I can get back to my shed

 

[rac37]

Very nice running engine you have there. I like it.

bob

 

[ShopShoe]

Congratulations Cogsy on a nice, smooth running engine.

It looks nice, too.

Well Done

--ShopShoe

 

[Brian Rupnow]

Cogsy---It's a beautiful thing. Thank you for posting.---Brian

 

[DavidLloyd2]

Congratulation Cogsy
Looks Great and Runs nice.

Thanks for the video,

DavidLloyd

 

[Johno1958]

Good one Cogsy she is a beaut
John

 

[Herbiev]

Well done Cogsy. A great runner

 

[Niels Abildgaard]

The moving around on table can be almost eliminated and engine more interesting to watch by a simple modification .I think Brian Rupnows design leaves room enough to do it.
If interested give me mass and dimension of piston and conrod or a link to where I can see the plans.

 

[Cogsy]

I don't have the mass of the piston or conrod. The conrod would be reasonably close to the plan size but the piston is made from aluminium rather than cast iron that the plans state, plus the grooves are completely different to plan as I used cast iron rings rather than the single o-ring as designed. Really though, it takes very little to hold the engine in place, even on this flimsy table (it's a weird folding table with the top folding in half and has massive overhang of the legs when set up, plus on 1/4" pine to boot). I'll source some rubber feet and then I'd guess it'll stop moving entirely.

The plans can be found in Brians' build thread, post #136 LINK.

 

[minh-thanh]

I LOVE YOUR ENGINE - Cogsy !!!

 

[de98441201]

very beautiful ， i also want to make one。can share the drawings ？

 

[Brian Rupnow]

very beautiful ， i also want to make one。can share the drawings ？

Check out this link. There is a download link for the plans in there near the end. I am the person who originally designed this engine.--Brian Rupnow
http://www.homemodelenginemachinist.com/showthread.php?t=25727

 

[minh-thanh]

Hi Cogsy !!
Can you tell me the weight and diameter of flywheel?

 

[Cogsy]

Not really sure on the weight. It's a bronze outer ring with aluminium centre approximately 130mm diameter to the outside. I don't really want to remove it to weigh it as it's being good and not loosening up on me at the moment. It is quite heavy though, mostly just the outer ring.

 

[michael-au]

Well done Gogsy nice looking and great running engine

 

[SwarfMuncher]

Sweet! Nicely done!

 

[de98441201]

Check out this link. There is a download link for the plans in there near the end. I am the person who originally designed this engine.--Brian Rupnow
http://www.homemodelenginemachinist.com/showthread.php?t=25727

Thank you very much！！！

 

[deeferdog]

Good one Cogsy, very sweet! Cheers, Peter.

 

[Niels Abildgaard]

Have tried to model a smooth-running variation.


Piston shall be as ligth as possible.
The Balaleika like conrod plus piston in place shall balance around crankpin hole
When this is put on crank the center of gravity of mowing parts shall be on crankshaft centerline.
It is very easy on computer CAD.
The version shown is alu piston and conrod .
Crankdisc is steel.

 

[pat_pending]

Congratulations Cogsy. Lovely engine. Looks and runs great. Think the Rupnow is tempting as a second I/C engine build for me now having seen this.