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Civil engineering generally requires a registered professional engineer to review and approve the drawings of public structures. This is a legal requirement in each state. Most other fields have no legal requirements so it depends on the QC setup where you work. I was a systems level engineer...

FACS is correct. It all depends on what is required at your particular employer. For many years I was the principal engineer for an R&D project where I designed and had manufactured all of the required research equipment. I signed my own drawings, picked my own vendors, supervised the...

OOPS.... Brian is correct about the spelling. My bad.

No special technology. Bellview springs are very high force small displacement springs. They are basically coned washers which flatten under load. Google "bellview spring" and you will see what they are. Your question leads me to believe you are not an engineer, as you have never heard of a...

Is there room for a bellview spring and maybe some spacers to provide the required preload? Their force/deflection curves are well known.

Probably does have active tensioning, my 02 Civic (14 years old) has squib pre-tensioners on both the belt and the buckle.

There are designs around of Geneva Mechanisms that are easy to fabricate from cam followers and can easily handle your torque requirements. Timelord

These type of systems have been available for small planes for more than a couple of years. Here is one small plane manufacturer that equips all its planes. http://cirrusaircraft.com/ Timelord

Electro-polishing will remove any surface contaminates from 316SS that are deposited during fabrication. This will allow you to use iron/steel containing tooling, making the fab job considerably easier. Timelord

You qualify the machine operator (not a welder) to operate the machine and then you qualify the process completely separate with each process variable determined and verified by testing. Timelord

How about making a thin walled container the shape you need and fill and vibrate lead shot into it. You may have to consider the packing factor in your attenuation calculations. Shot is easily available and the lead would be easy to recycle when you no longer need it. The container could be...

You answered your own question. Wax, just like my mother used to seal the top of jam jars in my youth. Melt and gently pour on, let cool. Done Timelord

3626 psi isn't piddling where I come from. It's a substancial working hydraulic pressure. Timelord

Not sure what is meant by "clean design". I would ask the customer exactly what he meant by the term. Perhaps he is after a food grade conveyor. Food grade equipment has some special requirements like wash down capability and bio compatibility of the parts that contact the product, etc. Timelord

I've done some top down and the way I handle it is as follows: Leave the in-place mat alone until you have finished creating the part. Then just delete the in-place mate and add your own back. Be aware that if the part is not totally restrained relative to other parts referenced during...

I can verify Kenat's post. I had a MIC6 plate hard anodized with no dye and the result was a blotchy grey. Not entirely unattractive, but hard to match. I was after the hard surface and didn't care about appearance. Timelord

Have you tried cast tooling plate? It is designed to be real stable. Like this stuff: (quote) MIC6® Aluminum Cast Plate The Best of the Best MIC6® Aluminum Cast Plate is a blend of the most desirable features of many individual metals. The result is a cast aluminum plate that meets the...

Drink up btrueblood, I have done this more than once in the past and it works just great.

Yes, didn't Peshtigo burn down on the same day as the great Chicago fire?

It's possible that part of the windows page file reside on the external drive. This would result in that behavior. Timelord