Recent content by Dullard

Not precisely responsive, but may be useful to sanity-check results: The theoretical maximum water production rate is approx 5.6 Kg/Hr per Ton of refrigeration. That's a fairly expensive way to produce water...

I have successfully used the combination of a step-ladder, an extension ladder, and the house roof to 'bridge' that kind of porch roof. Have a trustworthy person brace the step-ladder.

You didn't say what you're doing with the furnace. If you just want to 'backfill' the furnace with Argon, your setup will work. Gas won't flow from low pressure (furnace) to high pressure (bottle). The furnaces that I've been involved with weren't as simple as just 'backfill' - they required a...

You got it.

I'm wondering what 'high-tech' means. I agree that Engineering involves a lot of approximation, but that's a feature - not a bug. Engineering (Design) is about optimizing on specific axes. It might be cost, weight, energy consumption, temperature range, etc., or some combination of those...

I agree with most of what's been posted - I haven't seen any mention of: One good reason to use a Woodruff key is as a "mechanical fuse." They may be sized (and of proper material) so that they fail before anything else. That approach obviously requires some room between the 'running' and...

You absolutely need to have enough amperage (capacity). The capacity of your panel is well-defined. Your 'required' capacity is less so. There are a number of different sizing methods which (ultimately) take advantage of the fact that everything won't be on at full capacity all at once. Note...

Your Spidey-sense is probably right. There are only 2 real reasons to replace your main panel: -it's dangerously old -it's of insufficient capacity (Amperage) Assuming that you don't have one of the 2 issues above there is probably a much more economic way to achieve the same result. Most...

The initial problem strikes me as sleight-of-hand. Doubling the number of 'sides' while halving their individual lengths results in no change in the total length. No matter how many times you do it (up to and including an infinite number). The problem (basically) tries to trick you into...

It's more useful (for me, anyway) to think in terms of phase errors. Being at the same frequency is necessary, but not sufficient.

Assumption: Ornamental fireplaces don't have flues/chimneys. Whoever built it intended it to function. Hypothesis: There is a potentially large advantage in controlling the source of the combustion air for a fireplace. Depending on the mode of your HVAC (heat, vent, cool), the 'best' source...

I once heard this described more pointedly: "Engineering is the art of doing for a nickel what any moron can do for a dollar."

If your refrigerator/freezer has 'ice thru the door,' there is an excellent chance that you already own a dashpot - it is a common way to slowly/positively close the ice door. Wait for your wife to leave before taking it apart.

There is a product called "Shoe Goo." It's actually made for what you describe - I've had very good luck with it.

Over a number of years, I built/serviced/re-built a lot of the equipment used in the TPS (thermal protection system) fabrication facility at KSC. The guy who ran the facility loved to do that demo - he'd even do it for people who were lost and just asking for directions.