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Yeah I have since replaced mine with a better model

Yes, this was more of a further investigation into the effects of vapor smoothing and the real strength of carbon fiber and glass fiber filled filaments from my first video on the subject. A pressure vessel just makes a convenient medium for testing because the calculations for the pressure it should be able to hold and the testing method is straightforward. Injection molding would be a far better approach for actually manufacturing a plastic pressure vessel.

Did you adjust it all the way? I am assuming yours is the same model and year?

@@2ndbestvideos same model and year. had to drop steering wheel column to get pass the trim on my car and its done now

Hi there, do you mind sharing the name of this hike with me? Thank you🤗

Me again, I just rewatched the video and saw the name of the trail. Have a great day

⁠@@dorindaalberthal1316It’s literally called Soldiers Pass. It’s a medium level hike that takes you through some of the best Sedona has to offer. The boys and I just did a backpacking trip to West Fork, google that one, you won’t be disappointed!

I have some PA-CF but vapor smoothing that to get it air/liquid tight would be a challenge; it is resistant to most high vapor pressure solvents...

You live in Sedona and you have never once enjoyed what the area has to offer?! I feel sorry for you.

@@2ndbestvideos I FEEL WITH MY HANDS...LOL

Most modern vehicles (including this one) are tuned to run rich a startup to heat up the engine and catalytic converter quickly for emissions purposes. If you are in a cold climate and your thermostat is stuck open it would take longer to warm up and you would stay in rich warmup mode longer resulting in reduced fuel economy.

Sedona Arizona

Thanks!

It is as far from the register as space in the room and in the attic would allow lol

Good idea, I can definitely do a test of the non-vapor smoothed model

I think I bought them from bike bandit but I hear they're not a good supplier anymore

Lol not in the office but I have come across people randomly who recognize it and say something. The Canadians tend to wear theirs more frequently

I'm told this spot sometimes has even larger ones

Yes hydrotesting is far safer than testing with air or another gas (even with volumes as small as these)

Lol that is mostly the camera perspective

The connector to the rectangular duct? No I bought those.

In theory yes but at that point it is easier to just make the walls thicker to achieve the same effect.

So this wouldn't work. Putting the layer lines on the heads would theoretically improve the max pressure but it is quite impossible to print a threaded fitting on its side and still get any sort of usable part. I do have a fix for the layer lines question look for a follow up video in the near future...

Lol that's my wife

Yes the z-axis is still the weak point (as expected for FDM printing). I could print this model on its side but the overhangs on the shell would be much bigger that way (and require reinforcement) also trying to print threaded fittings sideways is a nightmare.

Good thoughts, I am working on a follow-up video that will start to answer some of those questions

You certainly could, that would be much more labor intensive though

could be, more likely my extrusion multiplier is a bit high, the random seams were all protruding a bit (most of my prints don't look like that)

Sure, why not: cults3d.com/en/3d-model/tool/pressure-vessel-sweeney2

I'll keep that in mind for the next video

Good point, yes a sphere is even better for holding high pressure than a cylinder. I made a cylinder because that is a common tank shape. For 3d printing the normal difficulty in manufacturing spherical tanks (lots of rolled plate with compound curves) is irrelevant. A 3d printed spherical tank would have larger top and bottom overhangs that would require a larger skirt or repad to reinforce though so depending on the size and desired pressure, either a cylinder or a sphere could be the better choice.

While sphere is easier to print than manufacture from metal we have anisotropic material here with weaker layer adhesion, cylinder printed vertically has less force trying to tear it apart by layer lines.

@@JGnLAU8OAWF6 Yep I have and idea of what to do about that, look for a follow-up video on the subject

Definitely feasible, I would probably overdesign it a lot just for safety

I bet a 2 liter soda bottle would hold enough pressure for an air brush. Bet you could find lots of videos of people pressurizing them.

For that pressure range you could consider using an empty propane bottle. Nice thing with this is you can easily find fittings to adapt the bottle to your compressor. If you do want to try this approach look for a fitting to refill the bottle and go from there to your compressor. We did this but we went a little overboard and used a 30 lb. tank. I think we should have used a torch type size the big one is too clumsy to move around.

i took an empty dashboard cleaner spray bottle (biggest I could find), emptied it out fully, punched a small hole, drilled it to size, sanded around it, inserted and soldered a brass valve from the old inner tube of my bicycle using electronic tin lead solder, and used it as a shitty air spray can for cleaning computers and keyboards. Still have it.

Vapor Smoothing seems to do the trick (and then some)

Thanks for the sub!

So for holding pressure, hemispherical end caps work best (will hold the most pressure with the thinnest wall) but a lot of people use either flat end caps (because they are easy) or elliptical heads (because that is what they see on industrial applications). With 3d printing it is only slightly more challenging to do a true hemisphere than the alternative head types so it's best to go that route. The other thing that matters is the vapor smoothing. There are some 3d print sealing products out there but I haven't seen any that work as well as vapor smoothing (and vapor smoothing uses cheap solvents so it is much more economical). Basically if you have a decent design and can do a good job vapor smoothing you can print things that are watertight and hold pressure pretty easily.

Duly noted, I will do a better job on the audio balancing next time

I could actually do that...

Jeez. Learn to wait with commenting to after the conclusion! xD

Lol yes I was expecting the vapor smoothing to make it stronger but I was surprised that it was 2.5x stronger than the original spec​@@mr_gerber

Well, layer bond also depends on so many other factors that I don't think we can say exactly what the contribution was from vapor smoothing without a controlled test? For example: nozzle temperature (and nozzle material), ambient/chamber temperature/fan use, layer height, etc.

Depending how long you vapor smooth the part essentially turns into casted. The problem for any rated use is consistency

Those are all definitely factors but using the manufacturer recommended settings which also match the typical printer profile for ABS should give a result in the ballpark of what they got in their own tensile strength test. Getting 2.5x greater strength is not going to be achieved just by tinkering with the print settings the vapor smoothing has to be a major contributor ​@@jessicav2031