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That's fantastic. One of my issues is I read those old paper book things that are nice and informative but don't, regrettably, update with the time. I'd love to examine a commercially produced flight diesel, in person, to see where they shaved off excess weight.

Currently Ford uses plastic in the drive systems for a bunch of their 4x4 stuff, the part melts under excessive stain like plowing.

A lot of detergents break down relatively easy, so your probably right about avoiding them. I think you would see de-zincification before you saw the copper do anything. How about this time around you share some build pics 😉 You pull these wonderfully crafted devices out of apparently thin...

Good attitude!

I guess that at least this way you'll be able to correct the displacement error 😅 Seriously too bad you're first go didn't work.

Can you slot in teflon slippers? You did make a gorgeous pump. What about adding steam oil and trying it with an emulsion?

Biological activity should also never be overlooked in any iron based hydrocarbon storage vessel. The inevitable failure of single wall heating oil tanks is due to bacteria that use that fraction of a percent of water to eat the steel. The same is true in hydraulic systems. I've seen clods of...

"Kerosene" is also not a definitive substance. It's like saying "kleenex". "Kerosene" is a brand name for a coal distillate that was used for lamps. Actual "Kerosene" is not the same everywhere. For example, many things refer to rocket engines running on Kerosene but it's actually RP1 a highly...

Diesel (sorta) has been used lots in aircraft, just not the excessively heavy diesel engines. The torque curve of a diesel is also not as favorable to a prop driven craft as a 4 stroke gas engine. JET 1 is basically diesel. It's closer to kerosene but kerosene is basically diesel minus the good...

It does in dynamic seals. I don't think it will in your pump because the film forming properties of oil are so much higher. Maybe some high temp silicon grease?

If you have construction photos, I'd love to see them. That's a neat engine.

Is that a slide valve on the side?

You can get corrosion on past contamination on certain metals (say steel) where the oxide and metal have different potentials. The oxides of certain metals, plus air, will also create the chance for the polymerization reaction of the oil which creates H2O or H+ or O- or worse HO- which further...

You mean there are potentially things that JB weld can't do?! Blasphemous! But yes, point well taken.

Might have more to do with NSF ratings on specific products. Edit, whoops did not see how old this thread was sorry.

The sulfur that produces sulfurous acid/sulfuric acid requires moisture, or a process that creates moisture, to produce acid. Just hucking a wet rusty iron bolt into a vat of pristine oil with an open atmosphere is enough to produce acidification. Dry headspace venting is a great way to keep...

I will put buying some Mason jars on my to do list.

Iron and steel are actually the worst for most oils as Fentons reactions spur polymerization of the oil via radical formation. If steel wasn't just so dandy, it wouldn't be used in hydraulics. Now I'm going to have to do some tests on oil and copper. But that would be derailing this thread, so...

I was thinking mostly copper pipe (iron plus any oil = bad for peroxide formation) and a simple dessicant positive air flow on the reservoir. Build up on the cylinder liner is something I'm still researching. A hydraulic cooling oil with a heat exchanger to the fuel oil is another thought.

What about using the fuel to cool the cylinder liner? I am kicking around the idea of a diesel that runs on a vegetable oil. That will require a combustion chamber temperature of 500°c to burn cleanly and the fuel would have to be 100°C + for a viscosity in the diesel oil range. I was thinking...