Member postings for Russell Eberhardt

Years ago I used to run the spares organisation in a vintage car club. We found a batch of stainless steel valves for one side valve model. They were run in cast iron guides and there were no reports of problems. I wouldn't like to use bronze guides though with the poor lubrication.

Russell

Yes, that is a magnificent structure and a great tourist attraction.

Near to where we live is the pont-aqueduc d'Ansignan a much smaller version but one that is still serving it's original purpose of supplying irrigation water around the village after nearly 2000 years! I have walked through the tunnel that runs under the water channel and it was completely dry.

Russell

I thought this was an fascinating article:

https://arstechnica.com/science/2023/01/ancient-roman-concrete-could-self-heal-thanks-to-hot-mixing-with-quicklime/

Our methods of engineering aren't always better than the ancients!

Russell

I have an old (about 80 years) lathe and a Chinese mill that I've converted from single phase to VFD/3 phase, a smaller mill with brushless DC motor and a bench drill with single phase motor. I certainly don't regret doing the conversions, the biggest improvement being the in finish I can achieve with the mill. The only reason I haven't converted the bench drill is that if I need high speed low vibration for small drills I can use the small mill.

Russell

This site has a good selection of thread tables including some very obscure ones:

http://ac2litre.com/fasteners.html

Russell

I was taught that it is hypotheses that are unproven. When proof is established they become theories.

Russell

If you want something similar in operation to Autocad 2D have a look at LibreCAD it is free and community supported. If you are an old Autocad user it might be useful as it will read .dwg files, at least the latest version for Linux does, I haven't tried the Windows version so can't be sure if that update has reached it yet.

Russell

If there is no serious injury resulting from the fall would the fire brigade be able to assist in such a situation? They have all sorts of lifting equipment and may respond quicker than the ambulance service? Here in France it is a bit different but they would certainly be my first point of call in such a situation.

Good luck

Russell

Do a search for the size o-ring you need on ebay. That has not let me down.

Russell

Coffee grinders are very popular here in France. Starting at about £12 for hand wound models up to silly money. This looks like a good compact model at a good price:

Coffee grinder at amazon.fr

Russell

You can import Solidworks parts files (.SLDPRT) into Onshape free version and they are editable. Not sure about assemblies or sketches though.

Try Onshape Free I think it was developed by ex Solidworks people and uses a similar interface.

Russell

Water is inorganic as it doesn't contain hydrocarbons. If it did, it could be considered to be an organic solution but I wouldn't drink it!

Russell

That's a smaller version of the "Trembler coil" used in the ignition of the Ford Model T motor car.

Russell

The answer is that while the instantaneous power can be high the average power is low as a result of the pulses being short.

Russell

Transcutaneous electrical nerve stimulation machine;

Russell

Thanks for all your hard work Darren.

Russell

Not too bad here, near Perpignan, at the moment. The top temperature was 39 C last week but of course we are prepared for it with ceiling fans and air conditioning. I've been getting up at 6h30 in the morning to do gardening before it gets too hot.

As you will have seen on the news the Atlantic coast is another matter. Over 47,000 acres of forest burned so far and 16,000 people evacuated.

Russell

Thanks Bill, Very interesting video. The hard work the apprentices had to put in reminds me of what I went through in my martial arts training under top Japanese masters!

Russell

Samurai swords were a bit more complicated than that. The better ones had different materials for the blade, the core, the back, and the skin. The fineness of the grain of the material depends on the both the number of times it was stretched and folded (normally between six and fifteen times) and on whether it was folded lengthwise, widthwise, or alternated. On a skillfully polished blade the grain makes beautiful patters on the blade.

Russell