Science/Engineering/Technical forums

Jerry wrote:I just want to know why they are going to sell it for 12k in the US and only 5k in asia??? (Assuming they ramp up production)

Cheaper labour costs for manufacture of the Asian models.

Thanks for the comments everyone...

3 phase power is something (one of many really) that I have difficulty grasping.

Suppose one has a 3 phase delta connected electric motor with a need to run it from single phase, this is something that is often done when building a rotary phase converter to create 3 phase power from a single phase ...

Thanks guys..... I cannot claim to have any real understanding of the physics of water, heat, steam et al and my eyes tend to glaze over if I ever open a text book! OK, that probably sounds pretty bad?

Now, without getting too deep and confining myself to the basic Newcomen engine, I am thinking ...

Hmmm, my understanding of the supposed ineffeciency of the Newcomen engine is that as steam is being inducted through the entire up stroke it is during that time that premature condensation takes place.

It is a bit like the 'flame licker' engines which draw hot combustion gases in then the piston ...

http://www.egr.msu.edu/~lira/supp/images/newcomen.gif

Newcomen's atmospheric pumping engine was one of the very earliest practical and useful steam engines. The operating principle was easy enough, steam entered a cylinder where a spray of cold watet caused it to condense and the resultant loss ...

Hi John

We are 80k from Shakeytown and generally free the effects of the shakes, excepting for the old buildings around town, some red stickered but many more facing strengthening or reduction to rubble.

Are you the folks half way up K Gorge? I am ZL2AYQ though It is many years since my filaments ...

That's one way, but this looks a little more controlled in a CNC machine. I'm pretty sure it is an actively-eccentrically driven curve of constant width.


I think it still has the template. It seems the template must have one more 'corner' than the cutter and I suspect the cutter must have an odd ...

I recall reading how to make this tool some years ago. The book was the lifetime experiences of some Dutch chap who was trained about 1900 and his trade school instructor made one on the last day of class to entertain his departing students.

The principle is easy enough, just a triangular shaped ...

Thanks Chris, I had not considered Mu metal mainly because I dont have any having taken all old transformers to the scrappies when we moved house.

I have been thinking that maybe I can get the same useful effect (as I get with my pseudo 3 pole bar magnet) by having two solenoid coils wound to ...