Swifty's build of Rupnow engine.

[Swifty]

Thanks for that Cogsy, that was a quick reply. I must admit that the video is a bit low resolution, and when I viewed it on this site, it took a while to buffer.

Paul.

 

[gus]

Hi Paul,
This great work and very fast work. Were you working overtime!!!!
Like you ,plan to run my engine w/o governor which will be made later. Plan to use CDI too.
Will take a month or two. After building Webbie,the Rupnow Engine will be a much faster build.

 

[Brian Rupnow]

I am very impressed! The engine looks fantastic!!---Brian

 

[Swifty]

Thanks Brian, I'm waiting anxiously waiting for the ignition to arrive so I can fit it. One minor problem at the moment is with the cam that pushes the roller, when the cam touches the roller it wants to push the bar down instead of along. I think that it's because the tail of the bar sticks out a fair bit without support. Will work on solving that soon enough.

Paul.

 

[Brian Rupnow]

Swifty--I noticed that on mine also, although it didn't seen to impair the way the engine performs. I used a 3/16" square steel rod as my lifter rod. My thoughts were that if it became an issue I would drill a 3/16" or 1/8" hole directly opposite the direction in which the rod wants to deflect and Loctite in a round brass rod to give additional support.

 

[jwcnc1911]

That head looks like an awful large chunk... wonder if it needs some cooling fins or something?

 

[Lawijt]

Not so sharp , but already a great video Paul. The engine looks great & now waiting for a new video with a running engine.
But before some tekst & picsfrom the ignition system.

Barry

 

[Brian Rupnow]

That head looks like an awful large chunk... wonder if it needs some cooling fins or something?

On a hit and miss engine, heat is created when the engine fires. Then during the next 4 to 6 cycles of the engine in "miss " mode where it is not firing, ambient temperature air is sucked in and out through both the intake and exhaust valve, flushing out any residual heat from the cylinder and cooling the surrounding metal. Bottom line is---No, the head doesn't need fins.

 

[ELM6061]

Been a while since I checked in Paul, and like always, parts are flying off the production line.
Looking good and while not really sharp, the video was not that bad, certainly gave us all good look at the progress so far.

Looking forward to hearing it fire up mate.

Eddei

 

[Swifty]

Just checked my USPS shipment of my CDI, it arrived in Australia yesterday, so will have to keep an eye out for any delivery vans. My workshop has a window facing he street, will probably spend more time looking out the window than working.

Paul.

 

[scruffy]

That's beautiful Swifty, Im about to start the E-Z engine once my new chuck comes in. I hope to be able to make some nice looking parts

 

[Swifty]

Hi Scruffy, thanks for your comments. I'm sure that you will enjoy your journey into engine making, the EZ engine looks like a great one to start with. As you slowly build up your skills you will be able to move on and tackle more involved engines. Good luck with your build.

Paul.

 

[gus]

Just checked my USPS shipment of my CDI, it arrived in Australia yesterday, so will have to keep an eye out for any delivery vans. My workshop has a window facing he street, will probably spend more time looking out the window than working.

Paul.

Hi Paul,

Soon the CDI will be on to your hot little hands.

Mine came in when I was away in Thailand.

Tomorrow will be a "Boring" day. Hope I can bore the bearing holes to fit.
The recess will be hard to do and plus both side plates must align.

 

[Swifty]

Woo Hoo!, the CDI and spark plugs have arrived. It's just like Christmas.woohoo1

I have started work already on the parts needed to hold the ignition, there's nothing holding me back now.



Paul.

 

[Lawijt]

Looks great Paul. I hope you have succes with the assembling.

Barry

 

[ELM6061]

Exciting stuff Paul, though it is a few months until Christmas, I am not sure if you should be opening those little parcels, I guess without the gift wrap, it's ok.
Hope it all goes together and unlike the little twin IC you have been working on, this one works first go for you.

 

[Swifty]

A little bit more whenever I have the chance, made the bracket for the Hall Sensor and the holder for the magnet. Better loctite the magnet in before I lose the marking on it showing the south pole. I had to make a few changes to Brian's drawing of the sensor bracket as I used larger bearings and therefore had a larger clearance hole in the side plate.




Paul.

 

[Brian Rupnow]

This has got me really excited.--The engine looks great. My internet has been out for 3 days, so I am just now catching up.--Brian

 

[Swifty]

Just been reviewing Brian's postings about the CDI ignition, noticed that Brian's circuit came in a neat black box, but mine is all mounted on a circuit board with no covering. I did order mine without the batteries and battery charger, which is an option when ordering, charger would not suit our supply here and I have plenty of small battery chargers already. The circuit will be hidden in a base box eventually, so that will protect it.

I think that I'm ready to get to the point of no return, will epoxy the Hall sensor into place and loctite the magnet in.

Paul.

 

[canadianhorsepower]

both last line will work about epoxy and Loctite