Engine Number Two

[ProdEng]

Last Friday I thought the engine was close to finished, not so! When I started to put all the bits together it became obvious that the spacing of the conrod and eccentric rod where wrong. I had made the main bearing bush prodrude from its mount to provide clearance but forgotten to narrow down the eccentric. Also the crank was narrowed for the same reason but I forgot to make a spacer for the crankpin. These fixes still did not make it right and next I found the cylinder mounting holes not quite in the right place so drill and tap two new holes. Now the engine went around but the valve position was wrong. Checked the valve against the drawing and it was fine so I checked my metric drawing against the original and errors had crept into the conversion. This was particularly upsetting as after all I draw for a living So I made a new valve and put the slot for the rod 90 degrees out arrrrgh ! I could go on with the rest of the little tolerance errors but I will spare you.

Anyway after two days of corrections the engine runs very nicely but I don't feel much like taking it apart to detail it and make a base so we shall see.

In the middle of this process the Sherline mill arrived and saved the day. It's a lovely machine, very well thought out and a pleasure to use. I am encouraged to buy all of the Sherline accessories knowing they will all play well together.

Might break out the camera tomorrow and take some pics.

Jan

 

[ProdEng]

A little more work done, made a wooden base and a dog point set screw to hold the flywheel on. I have never done a video before but gave it a go and hopefully there is a link next!

http://www.youtube.com/watch?v=kBbtSJN78r0&feature=youtu.be

 

[arnoldb]

A very nice runner Jan Thm: Congratulations

Don't worry about doing it up; it looks great as is, and bling can wait for future engines.

Kind regards, Arnold

PS: I just edited your link to show the video in your thread

 

[Tinkerer58]

Sounds like an aeroplane how did you get it to sound like that?? LOL All jokes aside its' a nice little runner, great work.

 

[ProdEng]

Thanks Arnold, I have indeed moved on and started to make a quick change tool post for my lathe. I still have lots to do to get my tooling to my satisfaction and then the engine builds will go a little quicker.

We have an airfield nearby that is home to an outfit that likes to reenact dogfights over the coast here, hence the sound effects ! A little earlier in the day we were treated to a performance from the local rock drummer, and so it goes on. ;D