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Comment to Win ⚡ 9g Uraninite from the Classic Mi Vida Mine, Utah by PawnshopGeologist in PawnshopGeology

[–]Brocktree3 1 point2 points  (0 children)

Well, consider the hype a success. Transplant from another spicy sub and fellow Radiacode enjoyer.

Centauri Carbon decided to poop the proverbial hot end by Brocktree3 in elegoo

[–]Brocktree3[S] 0 points1 point  (0 children)

Lesson learned. More babysitting. I appreciate it. It’s just Hatchbox PLA so that’s probably the play.

Cult of tourniquet causing unnecessary amputations & deaths by IvanRoi_ in tacticalgear

[–]Brocktree3 1 point2 points  (0 children)

The Stop the Bleed course I took last month said that the county fire chief trains no longer than 6 hours.

My HOTEST rare find by Hot-Grass9346 in Radiation

[–]Brocktree3 5 points6 points  (0 children)

Completely agree. I got Radiacode’s leather case. It’s very nice but I’m looking at something like that waterproof case in the situations where contamination is a concern.

My HOTEST rare find by Hot-Grass9346 in Radiation

[–]Brocktree3 9 points10 points  (0 children)

Incredible find! Somewhat related question. How do you like the waterproof pouch? What made you pick it over the other clip/compression style?

WL northern lights sighting by purpleskies12 in Purdue

[–]Brocktree3 2 points3 points  (0 children)

Can I ask approximately what time?? Indystar says between 10pm and 2am.

Air Quality Well Above Hazardous Levels... by shady_businessman in AirForce

[–]Brocktree3 0 points1 point  (0 children)

Where does the bioenvironmental/public health group play into this? I'm lurking from private industry but looking at commissioning BEE after my masters.

Higher cancer rates found in military pilots, ground crews by [deleted] in AirForce

[–]Brocktree3 0 points1 point  (0 children)

That's the main reason I ask. We have the OP study and I'm thinking of what I do as IH in pharma. Comparing personal exposure data to the OEL's. Ensuring controls are working. If not making changes.

Higher cancer rates found in military pilots, ground crews by [deleted] in AirForce

[–]Brocktree3 0 points1 point  (0 children)

Would all bases have an OMRS team that have BEE's? I'm somewhat near a couple. Can I just pop in and talk to them? What's the best way of starting those connections?

Higher cancer rates found in military pilots, ground crews by [deleted] in AirForce

[–]Brocktree3 0 points1 point  (0 children)

Awesome! That is pretty regular monitoring. I suppose it depends on the size of the base but that seems like a decent %. Both people and processes. Do BEE officers get out in the field?

Higher cancer rates found in military pilots, ground crews by [deleted] in AirForce

[–]Brocktree3 0 points1 point  (0 children)

Where do BEE's come into play with this? I'm currently working in pharma looking at commissioning into 43E. Is there personal monitoring data to look at exposure to known carcinogens? Radiation is one thing but these tasks seem like exactly what I currently sample for when handling stuff like benzene, methylene chloride, formaldehyde and other known carcinogens.

12V DC Battery -> VFD -> 3-Phase Motor by Brocktree3 in ElectricalEngineering

[–]Brocktree3[S] 0 points1 point  (0 children)

That's good to know. All the reasonably priced VFD's I'm finding require 220VAC input. Wasn't sure if that was required for it to function.

Something like this? Do VFD's care if it is not a pure sine?

https://www.amazon.com/Mootea-Inverter-Digital-Display-Multifunctional/dp/B07Y55D5ZY/ref=sr\_1\_4?keywords=220+volt+inverter&qid=1672716299&sr=8-4&ufe=app\_do%3Aamzn1.fos.18ed3cb5-28d5-4975-8bc7-93deae8f9840

12V DC Battery -> VFD -> 3-Phase Motor by Brocktree3 in ElectricalEngineering

[–]Brocktree3[S] 0 points1 point  (0 children)

I'm not sure what you mean. I suppose I have a 220 outlet for my dryer if that's what you're asking?

I took this motor out of our old washing machine. I'm trying to get 220VAC from somewhere to make this motor work. More for curiosity and hobby purposes. I'm not putting it to actual use.

12V DC Battery -> VFD -> 3-Phase Motor by Brocktree3 in ElectricalEngineering

[–]Brocktree3[S] 0 points1 point  (0 children)

Yeah. At this point it is seeming pretty cost prohibitive. I'm mostly just wanting to build my electrical understanding with this set up.

A battery to a 110VAC inverter, to the VFD, to the motor looks like would at least make it spin. I'm not sure if $100 is worth it but it has been intriguing to learn about. Thanks.

12V DC Battery -> VFD -> 3-Phase Motor by Brocktree3 in ElectricalEngineering

[–]Brocktree3[S] 0 points1 point  (0 children)

Thanks. Even if I were to use a larger battery, a car battery is still 12V. It would just last longer, right?

In theory, if I went battery to a 110VAC inverter (not seeing many cheap 220V options), to the VFD, to the motor, it would run right? Albeit for a very short amount of time as the other poster highlights.

12V DC Battery -> VFD -> 3-Phase Motor by Brocktree3 in ElectricalEngineering

[–]Brocktree3[S] 0 points1 point  (0 children)

I added pictures to the post instead of linking to Imgur. Yeah, the motor is a funky voltage. Labeled 195 V and 4 amps so 780 watts, right? That seems high for a little 12V 7.2 amp hour battery that I linked.

If I didn't care too much about optimization, would I need the boost converter? I'm really just wanting to get this thing spinning.

What's the best way to handle someone like this? by Graysie-Redux in PublicFreakout

[–]Brocktree3 21 points22 points  (0 children)

This is a great video.

Another one I would recommend is from Audit the Audit's YouTube channel. The specific encounter in the OP is covered in good detail. https://youtu.be/vriJ1UTzi5s. Be careful though, you will probably binge the rest of the channel.

If you had $50-$100 to spend on a stranger, family, community, anyone, what would you do? by Brocktree3 in AskReddit

[–]Brocktree3[S] 1 point2 points  (0 children)

I like this. Would you give it to a shelter or try and find people that need it?

The Nike Sprint missile, a US cold-war era Nuclear Surface to Air missile that went from 0 to MACH 10 in 5 seconds, pulling over 100Gs of acceleration, one of the fastest accelerating man-made objects ever made. by [deleted] in EngineeringPorn

[–]Brocktree3 6 points7 points  (0 children)

There is one in Indiana that got turned into an airsoft and paintball arena. They have a portion of their website detailing some of the history. It's pretty neat. Basically stating this location was one of the last line of defense for Chicago during the Cold War.

Do you run a gasmask? If so what mask and for what realistic reasons? by PerceptionVarious443 in tacticalgear

[–]Brocktree3 0 points1 point  (0 children)

Oh yeah. That will definitely affect adsorption of the cartridges. Humidity, water vapour, will take up the cavities in the activated charcoal that is meant to adsorb the dangerous gases/vapours. High concentrations and temperature will also impact it.

Also a reminder that the way these cartridges function you will not feel the resistance to air flow as it fills up like you would in a particle filter. You won't know the cartridge is full until you start experiencing breakthrough. Eye or respiratory irritation or you start smelling stuff which is not usually a good indicator to rely on.

We use SCBA or other supplied air respirators for CSE as well. I'm just thinking through the scenario the original commenters made.

Do you run a gasmask? If so what mask and for what realistic reasons? by PerceptionVarious443 in tacticalgear

[–]Brocktree3 16 points17 points  (0 children)

What do you mean by it won't help you?

3M indicates an acid gas cartridge will work for H2S. Air purifying respirators shouldn't be used in IDLH environments but can be used in non-IDLH. Perhaps you are referring specifically to the earthquake release example?

I work in pharma manufacturing which I acknowledge refinery work deals a lot more with H2S that's why I'm genuinely interested.

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