Recent content by NTL2009

I do have a vacuum system (used to transfer and de-gas home-made wine) that I maybe could adapt to this - but the question of stripping volatiles is an interesting consideration, and it would be a bit awkward. I also have a supply of inert gas (CO2 for my beer kegging system). And I have used...

This will be a bit off the main subject, but another consideration I have here is the quality of home grinders. I know the advice is for burr grinders, but from what I've read, the sub $200 burr grinders give pretty inconsistent grinds. My thought is is that I *may* be better with consistently...

Somewhat separate from the coffee advice of “buy whole beans, grind fresh at home daily”, I'm looking to understand the factors that contribute to purchased ground coffee losing freshness after opening (oxygen, humidity, temperature, time, other?). I'm assuming oxidation is the main factor...

According to the Wikipedia article, it might sort of be the other way around? https://en.wikipedia.org/wiki/Catalytic_converter So reducing carbon monoxide. And... reducing NOx - but some unburnt fuel is needed for the conversion. I think you can have very complete combustion, but with high...

Yes, but there is still a twist here. The author does state that running on vaporized fuel alone would have terrible performance. So modern engines set up with propane or LNG would be tuned differently, and not be talking (supposed) advantage of the lean ratio. From my reading, it seems that...

So allow me to move this away from whether or not the original 100 mpg claim has merit or not (since it seems clear that it doesn't), and phrase it a different way (which is more along my original intent anyway, but I guess I worded it poorly): Could vaporizing (versus atomizing) the fuel at...

A few years back, I was at a local 'Farm & Heritage' type show, and a number of presenters had these hit-and-miss stationary engines. I'd seen them before, and just figured they ran really poorly at low speeds! I talked to one guy, and he explained it to me, and put on a power belt and loaded it...

OK, so I took that and worked backwards from 40 mph (some searching says that rolling resistance and wind resistance ~ equal at that speed), and I found some support for less than (how much less?) 20 HP at that speed, for a typical mid-sized car (probably better tan a 1970 Galaxy though). That...

I think you are missing the point of my post. I don't care if it happened or not, that's not my focus. I'm interested in "driving for answers"'s analysis. The idea that it is at least feasible that a large V8 could approach 100mpg with vaporized fuel (or not) is something I find interesting...

Another viewpoint on my ~2.7 throttle ratio between vaporized and atomized fuel: Say the 'normal' engine RPM at cruise is 1800. The vapor engine would need 2.7x more fuel/air. That would take 2.7x the RPM (well, I'm not sure how the throttle plays into it - but ignoring that for now), which...

Yes, this is what the author of that youtube video seems to think as well. That it is possible to do, but with very poor performance. I think all cylinders were needed, just to get enough fuel into the engine to even reach cruising speeds. I was meaning to do some math - how much vaporized fuel...

Of course (also a boomer, if that matters?), and if that's all there was to this, I would not have posted it to this forum. The reason I found it interesting is, the youtuber I link says that he does think it was possible, he says the math works. But with caveats (see next post)... edit to add...

But the vaporization would occur right at the cylinder intake, so really no different from avoiding vapor lock in fuel injected engines today. You keep the fuel liquid up to the injector that would inject fuel onto the hot-plate.

Here's a video by “driving 4 answers” who seems to me to be well versed on the details of Internal Combustion engines. The video does cover something that's a bit shrouded in 'conspiracy theory', and he touches on that, but of course for phys.org, I'm only interested in the actual science...

Any modification that you do to a sine wave will produce some added frequency content. Depending how you do it, it could be harmonic (whole number multiple of the sine wave), or in-harmonic (some fractional multiple). Also, your comment: is not really true. A drum hit does contain a lot of...