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@Stubbers Thanks for your rationale. Let's continue this a bit more. There's always the issue of an inefficiently tuned gun. They waste air and are louder than they need to be, period. There have to be some assumptions made to make some testing program useful. I'd propose the AG's in...

How do you suggest making testing more tractable? It's obvious that we can't test every possible variation in the universe. So, in your opinion, how can the testing regime scope be reduced intelligently to something practical. If you don't think it's possible, that's ok, but then I request...

User name Xolotl, Tequila Gun. Silicone valve of some sort. Interesting idea.

So you are familiar with checklists :ROFLMAO: And making things idiot proof. I'm sure you were exposed to some clever idiots though! Don't know how to respond to "when I was still sane":D but I will leave it at that. Made me laugh.

Yes, he has collected a lot of moderator information as I recall. Minimal engineering skills perhaps, but think we will need to generate a check list, so those without engineering background can follow the list and get good results. The idea is to get reproducible testing. Unfortunately, that...

It doesn't, at least not to machinist tolerances. However, it can serve as a crude indicator of how close to the edge one is. Another indicator is a chip at the exit! That was when I didn't quite have enough clearance, fixed that with a slightly tapered hole. Even better is to true up all...

Sent you a PM on the mic. Sounds like a decent set up.

Gain and attenuation settings for the test - you know, like we were in a science or engineering lab, and we had to write it down. Not trying to make extra work, just thinking of variables that people often forget to document.

Hard to talk about optimizing design without talking about technical details. Clarification would be helpful. Testing seems to be allowed, so size, weight, (volume), cost, spectral characteristics, acoustic energy are some criteria. Feel free to modify/discuss. Ideally we'd have calibrated...

Got to think about it some. Really, I think you have made a pretty decent start at it. Here's some general stuff. 1) Documented test range geometry 2) Eliminate signal clipping - the signal we are interested in is short duration, so we shouldn't lose it. You and I have gone back and forth on...

Think it would be hard to maintain accuracy. But it doesn't actually need to be a wipe. It could be a fast shutter instead. But that's just me speculating off the top of my head.

We are slowly getting there ;)

I do not know if there's room to improve in a passive design or not. It might be that without relaxing a constraint, the problem is intractable. That being said, and in my engineering experience, it is often in examining constraints that one can find a few items that formerly were constraints...

I thought it was the PB thread sizes that did in that thread. But other posts were taken down as well. Not all, there are some remnants remaining in other posts, but who knows if that will change tonight. Seemed to have touched a nerve in any case. Will have to wait and see what shakes out...

Yes, it seems open discussion about construction details are no longer allowed. Post #4 really is a summation of rules of thumb, unfortunately it doesn't answer how to optimize within constraints - there's an unknown cost function. So people will continue muddling in the dark. Think I'll be...

I've not bought any horses and carriages lately, nor do I have any to sell, of any kind. Haven't bought any moderators, from any vendor, only have printed a couple of my own. So I have no commercial interest in any outcome.

Gentlemen, calm down. Don't take the bait, both of you. I'm in it to know more. What makes a moderator more effective? How can it be optimized within constraints?

Maybe that day is not today, but saying nothing is going to change is defeatist, IMHO. It's like being in 1899 again. Your "crazy idea" isn't that far fetched. I do contest your comment on "incredible programming", actually that would be the easy part. The hard part is getting mechanical...

Probably because most individuals, myself included, haven't done the engineering, analysis and testing necessary to understand enough to make the right kinds of changes. Most of the work I have seen is "seat of the pants". That's not to say there hasn't been legitimate hard work involved, and...

Sounds an awful lot like what was said in 1899... There's nothing new to be invented. Have to say it was wrong in 1899, and wrong today. I agree however, that people are chasing dragons, and that there are suckers in the marketplace. But there's a lot more to invent yet, there's no need to...