Search results

Loving your work, this suggestion is not quite what you're asking for but in the larger scheme of things perhaps this type of IC engine is the one you're missing to complete all the other types of operating principles...

Besides shimming the tailstock a simple way to achieve your parts-goal is to mount the drill(s) in the toolpost. That way you can adjust height and drill straight dead centre. Search for drill chuck tool post and a lot will come up. Just saw your tailstock in half (horizontally). Mill pockets...

Well done!

https://www.pathon.com/jiffy.htm Essentially just a reciprocating end used for filing or deburring. I assume its operation is the same as a hand held Die-filer.

Another possibility is drilling a tapped hole angular to the centre of the bolt, insert a piece of copper and thread this in the same operation as you would for the screw. With a setscrew angular you can adjust the tension by moving the piece of copper. Or if you want to do iet really fancy put...

It could be an error on their behalve with just one drawing or its just because they use another projection method. Truth be told if the drawings are professionally made nowadays there should be a drawing of 2 cones in the title block which show the projection method used. German drawings are...

Most of the models from the link to Grabcad are mine. So I do own a lot of original CR750 parts (which cost a small fortune) and modeled them in 3D (lots of time involved). Most of the standard CB750 parts which I replaced by CR750 parts or standard parts checked to re-use in my bike are modeled...

I saw your post on the CYB Facebook group as well but you stated there it is going to be a full 1/4th scale CR750 model with working engine. How faithfully are you intending to copy the internals / externals of the engine and entire bike? Are you contemplating on making your own oil pump /...

Congratulations on your fine build and results! It has been fun and a great learning experience to tag along reading your posts.

Those look real nice!

I wish you a speedy and full recovery! And as always I'm loving your updates.

Perhaps its possible to test load the motor by winding a weight on a rope with a pully directly connected to the motor. The same goed the other way round if this method can turn the engine over you can determine the power needed with some rpm's. It has to be a relative long rope but i assume its...

I am still enjoying every update and the tremendous amount of research which is going in building this beautiful engine!

I hope you have a good and speedy recovery!

The distortion comes from within the metal itself as you've discovered. This is due to internal stresses and atom alignment. Simplified it's like layin bricks, there's a certain logic in which metals are formed or bricks are layed. When removing some metal or by inducing stress...

It is my understanding that a radius induces strength for one and reduces the risk for metal-fatigue and stress-cracks. Also there are min and max tolerances for fit and function, I've attached a table from an old book regarding threads showing the differences between them.

Real nice work! I'm always eagerly waiting for a new report and enjoy reading it.

Perhaps you've already visited this website, if not you're in for a treat! http://flashbackfab.com/excelsior-project-paul-brodie/

Cut a piece of round stock under an angle, this gives a quite good oval depending at the angle and doesn't waste much material. The edges can then be ground/filed square with a template as suggested, this should save a lot of time.

It could be possible that you've accidentally work-hardened your piece in the process of turning it by choosing a wrong speed or feed and warming up the workpiece. Using coolant can in some instances harden your heated up workpiece. I didn’t’ know what hit me when I had this problem...