- Jan 26, 2022
- Reaction score
The thinking was twofold:
As for the other comments following my test run, they're all good comments. I fully understand that you all are only trying to help. But there's a bigger issue:
- As the piston went to bottom dead center, the oil on the back end of piston would get pushed out of the cylinder and then work its way into other areas.
- When the pump stopped, the oil would then fall onto the center bearings.
The Air Pump Don't Pump Air!
At this stage in the game, I'm so far off from my original intentions, that I really need to evaluate the cross leakage. I'm not even really worried about volume right now. A noisy air pump that actually pumps air is better than a quiet air pump that doesn't do squat.
Thus far I'm thinking of:
Please understand that I'm not trying to be an ass. Yesterday was quite the disappointment.
- Replacing the possibly ill-fitting barbed fittings
- Making a new crankshaft to incorporate 100 series (.103 thickness) o-rings instead of 000 series (.070 thickness) to have more tolerance for air gaps/mis-alignment.
- Making something akin to springed motor brushes made of either teflon or brass that would press up against the crankshaft for port sealing.
I hope I'm wrong, but the only place I see your lubricating oil going is a one-way trip out the High Pressure air exhaust port. At 1700 rpm centrifugal force will move all the oil that comes into contact with the cylinder wall past the O-rings, into the head area of the cylinder, and there it will be pushed out of the air exhaust port. I can see some oil being trapped on the bottom side of the piston, but the surface you want most to be continuously lubricated, the cylinder walls, will most likely run dry after a few minutes of operation. I just don't see where oil is being continuously moved onto the cylinder walls. I don't understand how the oil your piston pushes out of the cylinder finds it's way back onto the cylinder walls.