Recent content by Baluncore

Likewise, the wiring in my over 100 year old house, for lights and the original power outlet for a refrigerator, are all original, circa 1945. They have two solid copper conductors, each helical wound with cotton thread twice, left and right, inside a grounded lead sheath. I don't disturb it...

It depends on the ratio of tensile strength to shear strength for the material. Is this homework? Given tensile strength, how does an engineer find the shear strength for a material?

NaCl is a very poor desiccant. The best way to remove water vapour, is physically with a vacuum pump, or in a chemical reaction with CaO, but that can get angry when it expands, and is difficult to reverse without an 825°C kiln. The cheapest way would be with silica gel, sold in the...

If sailing could halve the fuel requirement, they would have to double the thickness of the LNG tank insulation. https://en.wikipedia.org/wiki/LNG_carrier#Reliquefaction_and_boil-off

The life of the wiring is probably determined by the quality of the insulation. If it was wired to a national code in the last 30 years, then it should still be safe and functional. We do not know who wired it, so you will need to get it assessed, to identify if it was wired to the standard code.

LNG tankers will not benefit directly from sail unless they are better insulated, since they are fuelled by the LNG that boils off during the voyage. Australia sells coal and iron ore to China for steel making. It would be more sensible to make the steel next door to the coal mine in...

You are correct, it was Plato, signed and dated 345 BC.

NSK 6801 - 12 mm ID x 21 mm OD x 5 mm wide. open in oil = 38,000 RPM. metal shield = 32,000 RPM. non-contact sealed = 32,000 RPM. rubber lip sealed = 20,000 RPM.

I design and build new machines, furniture, etc. You would need to find someone on my island who can test it, while I refine it through a few prototype stages, and find out what works best.

Welcome to PF. You can attach a picture of the existing machine mechanism to your next post. There is an "Attach files" button at the bottom left of the reply window.

Yes, boil it vigorously. The molecular weight of water is 18 g/mole, while air averages 29 g/mole. Water vapour is lighter than air, so it rises. You must therefore stir the gasses to progressively dilute and remove the air from the bottom of the ullage space.

Temple Grandin publicised the observation that, those on the autistic spectrum seem to prefer heavier loaded blankets, but for contact, not for thermal reasons. The problem with designing a rocking bed is closing the geographical distance between a creative designer and a test subject. This...

When I lift a bowling ball, I invest energy in the process. The system configuration contains the energy, not the ball. When I dig a hole and make a pile of soil next to it, I am redistributing energy between the accounts of my system. If the ball is then lowered into the hole, the energy I...

But each of those boats has two leeboards, the high side is showing, while the lower leeboard is deep in the water, under the vessel. Those hulls are not loaded with cargo, and are not flat-bottomed when sailing unladen in that heeled mode, they are taking advantage of the chine and one...

"If you cannot measure it, you cannot manage it".