Oil Pump Assembly
Today I worked on the oil pump assembly. I am using O-rings to seal the drive shaft and the oil passages in and out of the pump. For pressure regulation there are two grub screws that can be used to limit the passage width to both the top end and the bottom end. I do not have any form of relief valve in the oil system, just a way to divide the oil flow between the top and bottom end.
There are still a lot of details to be worked out, but I need to start working on the actual mechanical drawings. The desired end result is a set of plans, after all. I have not given any thought to part numbering or descriptions standardization of the parts. I have a rough idea of how I want to maintain configuration control. I am thinking that once I start fabrication I will reset the version numbers to version 1, then increase from there as I find issues.
Below is a cut away view of the oil pump in the lower crankcase half showing how it is tucked into the engine.
When I kicked this project off on December 23rd last year, I gave myself one month to complete the design phase of engine. This means I only have one more week to wrap it up. I am getting antsy to get back out into the workshop and make some parts. I have learned the hard way not to start machining parts before the design is completely finalized. I have found many design errors after parts are made, that if I had been more thorough in the design phase, could have been prevented.