Recent content by bruedney

I think it is fuel related. My Rupnow single IC runs much easier on 95 Gasoline than on white spirits

It is your model. Do what you like. Here is a photo of my version

Or as Pete from NZ indicated it was serialized in ME from 24th August 2012. Here is his build log Nemet Bobcat Bruce

And the compression and power stroke is likely to push both valves open IMO.

Could you add some holes filled with lead to the weights?

Not to mention setup time (slicer orientation and support structure placement), restart time when you find the print has failed after quite some time of printing (you can't see the print until it lifts clear of the vat), the clean up time, the curing time. You will also need good PPE and a very...

Hi Paul What part of Wellington? I live in Wainuiomata and work in Rongotai Regards Bruce

My personal uneducated opinion is that the issue is a combination of timing and carburetion. I have read some posts on RC forums about issues using 2 stroke carbs on 4 stroke engines.

My friend Joco_NZ has an AT4 vfd on his mill and the manual shows that it has pretty basic features whereas I have a HY02 (Huanyang clone) vfd for my Bridgeport mill (yet to be fitted) which appears to be quite feature rich. Whilst I have had mine running I can't comment on performance yet Joco...

Try this Aliexpress 4 cyl Ignition - I have used a single plug one with a small Lipo battery and it is great Regards Bruce

Here is my gas tank for my Rupnow IC engine It is thick walled Ali tube - Internal thread and watch glass and thin oring captured by retaining ring Works great

Brian made them available in this set of drawings https://www.mediafire.com/file/fh7wnz2d4cgt0s4/VERTICAL_CYLINDER-RUPNOW_ENGINE.zip/file

Hi Rudy Nice engine. Thanks for the build thread I am currently modelling up #770 and am having difficulties reconciling the dimensions on the Exhaust Valve Rocker Arm Bracket. I see from your drawings on post #33 that you may have had the same difficulties. Could you please shed some light...

That is not right. According to EE's web site (https://www.eccentricengineering.com.au/index.php?option=com_content&view=article&id=36&Itemid=107) the holders can be used with the lathe running either forward or reverse. I have one and run it upside down in my normal toolpost with my lathe in...

Or you could get it from here...