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InvisibleSpunkyMonkey88
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Help me make this mono functional please
    #26406377 - 12/29/19 01:40 PM (4 years, 1 month ago)

I made this tub as little experiment to see how many 3/8" holes it would take to replicate the air exchange provided by a flipped lid.

I did a rough measurement of the air gap of the inverted lid and the total of the holes in a 6 hole mono with 1.25" holes  and thought about 22 X 3/8" holes would provide a similar amount of FAE as bods unmodified tubs and the oldschool monos with 6 holes. Except this tub would have a sealed lid and the air holes would be more spread out.

So theres a total of 8.25" diameter of the holes which is slightly more than a typical monotubs.  Most of the holes are uptop except 1 on each side 5" from the bottom.

So even with all those air holes I still managed to get a tub full of pseudomonas bacteria, which I heard is causes by insufficient air flow/ too much moisture...


What should I do?

Drill more holes OR tape up all current holes and flip the lid?

I'd really prefer to avoid flipping the lid...

I just like how nice and uniformly the lid latches



Edited by SpunkyMonkey88 (12/29/19 02:04 PM)


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OfflineSFS96
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Re: Help me make this mono functional please [Re: SpunkyMonkey88]
    #26406395 - 12/29/19 01:50 PM (4 years, 1 month ago)

I personally would tape the holes up and make a classic mono but Pastywhyte’s EZ dialed  monotubs might be a good option.


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InvisibleSpunkyMonkey88
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Re: Help me make this mono functional please [Re: SFS96]
    #26406684 - 12/29/19 05:39 PM (4 years, 1 month ago)

Quote:

SFS96 said:
I personally would tape the holes up and make a classic mono but Pastywhyte’s EZ dialed  monotubs might be a good option.




Ya but I think pastywhyte's tubs work so well because they the lid allows for some FAE aswell. While mine is airtight because of the gasket.

I was loosely following pastys ez tubs concept though except for way more holes in the tub. I think I had a lot of them covered with micropore tape though which restricts airflow BIG time.

But pastys tubs have a total of 2.5" (10x .25")  of holes uptop on the short sides and 1.5" (6 x .25") down below on the long sides for a total of 4" worth of holes.

I had a total of 8.25" worth of holes, so nearly double the amount of FAE holes as he has in his tek.

So I must have not had enough open holes to make up for the air tight lid.

How many total inches worth of holes do you think would be needed to make up for the airtight lid?


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OfflineSFS96
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Re: Help me make this mono functional please [Re: SpunkyMonkey88]
    #26406693 - 12/29/19 05:48 PM (4 years, 1 month ago)

I’m not sure but those gaskets are removable. I have a few of the same tubs but I removed the gasket to let it breath a little bit. Iv been running classic monos with micropore tape, I don’t really care for unmodified tubs except for shoeboxes. I do want to try out pastywhyte’s ez dialed tubs though.


--------------------
How I make and preserve tea


Consuming consumes a man That was never a purpose of life To only crave for material joys Is believing the lie - Mellow Mood


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InvisibleSpunkyMonkey88
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Re: Help me make this mono functional please [Re: SFS96]
    #26406699 - 12/29/19 05:57 PM (4 years, 1 month ago)

Quote:

SFS96 said:
I’m not sure but those gaskets are removable. I have a few of the same tubs but I removed the gasket to let it breath a little bit. Iv been running classic monos with micropore tape, I don’t really care for unmodified tubs except for shoeboxes. I do want to try out pastywhyte’s ez dialed tubs though.




I just figured theres gotta be a way to duplicate the air coming through the loose lid, by drilling some holes...

I'm just being weird and really wanna keep that nice gasketed lid on and latched...

I just dont see the point in drilling 1.25" holes then putting tape or polly in them until the let the same amount of air through as say, a 1/4" hole with nothing in/over it..

Have you ever put your mouth up to a 1.25" hole with MP tape and tried blowing through it? That shit really restricts airflow...


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Offlinespiritlands
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Re: Help me make this mono functional please [Re: SpunkyMonkey88]
    #26406701 - 12/29/19 06:00 PM (4 years, 1 month ago)

I don't think calculating the surface area of the hole is going to perform the same as fewer larger holes. I'm a machinist and I drill 100000 holes per part. The parts are designed to pass a specific amount of gas which we measure with very sensitive equipment. The reason it doesn't work the same is because of fluid dynamics. Each hole has a length the thickness of the wall if the tub, essentially a really short tube. This uncalculated surface area causes resistance to air or fluid that passes through it. One large hole would have significantly less surface area for the depth of the hole then a hundred small ones. Not to get technical but that's why you're not getting the airflow you calculated for. A tube will only allow a certain volume to move through it at a given pressure. Blowing through a mouthful of coffee stirrers would be harder than blowing through a garden hose the same length bc each wall increases resistance.

Fluid dynamics calculator


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Edited by spiritlands (12/29/19 06:09 PM)


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InvisibleSpunkyMonkey88
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Re: Help me make this mono functional please [Re: spiritlands]
    #26406714 - 12/29/19 06:09 PM (4 years, 1 month ago)

Quote:

spiritlands said:
I don't think calculating the surface area of the hole is going to perform the same as fewer larger holes. I'm a machinist and I drill 100000 holes per part. The parts are designed to pass a specific amount of gas which we measure with very sensitive equipment. The reason it doesn't work the same is because of fluid dynamics. Each hole has a length the thickness of the wall if the tub, essentially a really short tube. This uncalculated surface area causes resistance to air or fluid that passes through it. One large hole would have significantly less surface area for the depth of the hole then a hundred small ones. Not to get technical but that's why you're not getting the airflow you calculated for. A tube will only allow a certain volume to move through it at a given pressure. Blowing through a mouthful of coffee stirrers would be harder than blowing through a garden hose the same length bc each wall increases resistance.




Ya but I'm just going off of pasty's tubs with 1/4" holes that seem to work fine.

I want to do the same concept (open holes no poly) but with 3/8" holes and am wondering how many extra holes it would take to make up for the airtight lid I am using...

Probably gonna just tape them up and flip the lid TBH unless someone could give me a decent recommendation to the amount of holes I would need...

That calculator makes my head hurt lol...
I really doubt the the 1/8" walls of the tub restrict airflow at any level worth considering...


Edited by SpunkyMonkey88 (12/29/19 06:13 PM)


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Offlinespiritlands
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Re: Help me make this mono functional please [Re: SpunkyMonkey88]
    #26406769 - 12/29/19 06:53 PM (4 years, 1 month ago)

I'm in the same boat. Never had luck with monos so I've spawned 3 if them. Gonna try the lid gap unmodified tub. I'm going to drill a hole big enough to insert a couple finish nails along the long sides of the rim to prop the lid up a consistent amount while the latches hold the lid down. Good luck to you.


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OfflineSFS96
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Re: Help me make this mono functional please [Re: SpunkyMonkey88]
    #26406843 - 12/29/19 08:19 PM (4 years, 1 month ago)

SpunkyMonkey88 said:
Quote:

SFS96 said:

Have you ever put your mouth up to a 1.25" hole with MP tape and tried blowing through it? That shit really restricts airflow...




The Micropore tape i have doesn’t really restrict it much. It’s pretty easy to blow through. Iv seen  people using athletic tape and that shit restricts the air a lot.  I also like 1.5 inch holes.


--------------------
How I make and preserve tea


Consuming consumes a man That was never a purpose of life To only crave for material joys Is believing the lie - Mellow Mood


Edited by mushboy (12/29/19 08:21 PM)


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InvisiblemushboyMDiscord
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Re: Help me make this mono functional please [Re: SFS96]
    #26406845 - 12/29/19 08:22 PM (4 years, 1 month ago)

holy shit i butchered that my bad :rofl:


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OfflinecronicrFacebook
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Re: Help me make this mono functional please [Re: mushboy]
    #26406922 - 12/29/19 09:19 PM (4 years, 1 month ago)

:rofl:


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