Why do we use ported cylinders?
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- เผยแพร่เมื่อ 14 พ.ค. 2024
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"i don't want to bore you to death with mathematics..." proceeds to do maths :D thanks for the vid mate
35cm barrel + 100% cylinder has been my mantra for years now. Thanks for making me feel justified in every argument I've ever had about air ratios :)
My favorite is: "why does your blaster shoot so much further and more accurate than mine?" *explains why* "no that's not it your wrong."
I found out using a full cylinder with 155mm barrel shoots .5j better than a cylinder that is ported halfwat
Thanks for another awesome tech vid. Can’t wait to get the patches 🤙🏽
I am always intrigued watching your videos mate.
Another to consider is that the ported cylinder are for the maximum effectiveness of the spring pressure. With full cylinder on a short barrel, the gel is already fully out of the barrel before the spring comes to a full push inside the cylinder, thus spring strength is under utilised.
This is amazing!! Learnt a whole lot. If my math teacher in my days would have taught me like this, I would have been a math genius :D
Loved the video man! got the patch too!! gonna look good on something when we are able to start playing again lol
Another great video and nice explanation for people - I can't believe that your not sponsored! - you should be and deserve to be 👍
Mate you are a damn GOD ..
Your tube tube channel has explained so much and is so helpful ..surprised your not working as a engineer in gel blasters ..good job mate 😊
I didn't expect to learn math and practical experiment here. All I know "Gel Blaster is just a toy". Here, another like and subscriber.
That liquid pressure test was cool af though
fr
Yes thank you guido
Got to be the best information I have seen
This is a great video. I have a triangle shaped port in one of my cylinders right near the base so it's not as big as a port as the one in the video. I tried using that cylinder after using a full one, but after I heard you say it's good for 16cm barrels I changed it. Fps did go up 20fps and it's very consistent now. My 100% cylinder randomly shot 340 fps to 500 at times and even though I have a hop up it didn't help as much as it should. Hoping to test it during daylight to see if its more accurate. I have a 25-23 cm barrel in my HL-15 honey badger I think.
Have tried thr Bruisemaster TED is affective on gels well over 400fps looks fenominal.. Hop ups are pointless at this point where ted vents air pressure and imparts backspin in a much more precise way.. Looks amazing the future of gelball looks bright.. And in good hands...
Shout out to the Bruisemaster!! and GBU!! cheers guys Dazza
Great video, thanks
great video man, you reckon you could do the JN ak74U review and upgrage please?
For that full cylinder and the 350mm barrel, what spring do you recommend?
So I’ve just put a replacement gearbox with a full cylinder in an SLR, a brand new one no less due to crappy build quality. This video explains in layman’s terms exactly why said SLR still has punch but has lost all accuracy. Short barrel, needs ported cylinder. Long barrel needs full cylinder. Now go deep dive on the maths to find the goldilocks cylinder volume/barrel length. Low Guido you are a treasure trove of knowledge and skill in this risky, expensive world of gel blasters.
19:35 Where does that 1.8 come from? What experiments have you done that gave you the 1.8x?
Hello. Do you suggest this ration for any weight of the bbs?
which is the best to used for my m4 stubby..open type or close type..any help for the result..t.y
about the intro to almost every video, who's the first gel ball channel on youtube?
Mo Fengze me
So what sized cylinder would I use with my 35cm barrel in my M4A1? (sorry im new to Gel blasting)
So, education in progress, but WELL DONE!
To keep it short n sweet, physics is now FUN with a practical application, newly subscribed.
Different note, still have patches?
You got me with the nord vpn hahaha
Great video. I gotta question if ya dint mind given me your time. So i rece tly bought the krytac mk2 spr/pdw bundle and im just wondering how all this works with the same ported cylinder to barrel ratio when the pdw in er barrel is less then half the length of the spr inner barrel? Is the cylinder meant for one more than the other or is it just wrong for both or is it a middle ground that works for both lengths but not ideal for either lol
You would need to calculate the barrel volume of both and work it out.
I've got 70% port in my cmya with a 290mm 7.1 barrel I think it's about 1.9ratio
Can you leave your current cylinder and put it on your next gearbox
Probably one of the best videos you've done 👍
Good walkthrough.
So I am bad at math. So as a shortcut, if my barrel was 21cm. Or 60% of the ideal unported length of 35cm. Then I'd want a 60% ported cylinder. So basically I could use the length of the barrel (in percentage terms of 35cm) as a guide to get the desired port on the cylinder.
Makes sense? Does the math work? Easier for my non-math brain.
As a part two a test on fps impact of ported vs non-ported, given same barrel lengths, would be interesting.
so for a 21cm barrel you would have about 9.277cc of volume in the barrel (based off a 7.5mm ID) for 1.8:1 ratio you multiply by 1.8 giving you 16.698cc you can then work that backwards to a cylinder length of 38.16mm which puts it just a touch longer than that of the cylinder that I had calculated at 61% so.. yeah, your theory checks out.
@@lowguidoschopshop thanks mate!
Ermmmm pls correct me if im wrong. Ok for a reaaally non math & non number brainer like me, i would fully fill up my barrel with water, & then pour it into the cylinder. So above the surface line of the water in the cylinder, thts where i port the hole. Can this works efficiently too? For me either way does gave me excruciating pain when i test it on my skin so i canot really differentiate which is stronger. 😢
am i ruining my accuracy by having 50cm barrel?
I might of missed it but would I include a hop up to the length of my barrel?
No. A good hop up will have a vent in it to vent excess pressure at the end of the barrel
15:23 ....giggidy
So with calculating the barrel length shouldn’t you be taking into consideration the length of the T-piece and the cylinder head as well? If so obviously that changes the volume calculation considerably compared to just measuring the inner barrel.
Absolutely
Need to crown those barrels
Thanks so much dude. It is super obvious when you look at it, but I wad being lazy.
I've heard that a ported cylinder also allows the plunger to accelerate to a higher velocity increasing the fps on a short barrel.
Do you think there is any truth to that?
Yes this also works as long as it isnt short stroked or DSG.
What's a dsg?
@junopettingill8169 dual sector gear.
Basically, fires twice on every complete rotation of the sector gear
@@dhain1982 ohh so that's why he had a gnarly looking gear when he built that mk 12 build
Yeah love your work! I always work on and recommend 2:1 (easy to remember) but trying to explain the maths to others sucks. Now, I can link this vid lol...
Hey Low Guido, great experiment btw. How about pressure? just by changing the springs, gives you added FPS boost. I've experimented with a full cylinder on a 1.2 spring pushing 280fps out a 50cm barrel.(Ausgel Milkies), i've had the same readings on another blaster with a 27cm barrel on a 80% ported cylinder, also 1.2 spring. :)
the spring dictates the FPS to a point. there are other factors such as bore size etc, but what we are looking at here isn't power, but efficiency and accuracy.
@@lowguidoschopshop efficiency doesn't matter and accuracy is barely effected if at all, at least i group the same ported or not regardless of barrel size using bench rest at 10 meters.
@@trodengore 10m? Might as well spit on the enermy. We're talkin +30m, where spin really comes to play.
@@liamcooper5202 lack of space to test at greater distances
☺😊😀😁😂5 mother @#@$ing coffee got the one out the spring barrel that tells me the 250fps out ????? Had most off this one but the barrel cylinder i finally got bloody brilliant! (As at current I'am doing a dule 5mm rod lock shart for a selection switch unfortunately the selection side has a 5mm bump so no fit?? it will fit on the non used side but you need a spacer lock you don't get ) 😕 talk about to drive you nut's but worth a nother coffee if you get board at the moment 😬 and educational 😆.
Will this apply to a Airsoft AEG?
Get at me buddy i mod aeg airsofts guns for a living.
So, why and what is he up-grading? I take it he is working on an AEG Gun but some of his terms like gel & water have me a bit confused, as well in this sporting of the cylinder... I guess the spring that is loaded is presented with an air flow problem not allowing the spring to activate as agile as it can. Hmmm or am I completely cornfused?
we do not use BBs we use super absorbent gel. (orbeez) its mechanically similar to AEG in operation.
@@lowguidoschopshop Oh... no wonder I was lost and confused. Being new to AirSoft, PaintBalls and such I only recently entered back into the BB gun thingy to find a whole new array of operations. When I left there were only BB guns, pellet guns and CO² but now there is so much more. I had been living in a world of collecting FireArms. But 3 Skunks found their way into my abode. 1st day I thought they were raccoons. But the very next day one climbed on top of me. (I was blind-sided) I did not wish to use my 45 so I ordered a couple BB guns and one 6mm GFSMG Tommy gun. You can't shoot one skunk without worry from the other 2 and if I was going to dispense them I really needed to do it quick, fast and in a hurry. Well they just kept coming back and they were always polite, even the one who climbed on me. By the time the guns arrived we had become friends and so now I will not shoot them, but i have some real problems with other critters, like rattlers and Raccoons that attack our chickens.
I doubled check the title cuz i tought im watching math antics
Umm when I’m not using the gels and there fully grown do I keep them on water or do I just leave them in the water so they don’t shrink?
Air tight containers are the go.
So what we need is a graduated hopper with polihagonal rifling to use that excess air to impart side spin ( like a muskit ball or bullet) so it stabalises it while still taking advantage of the higher presure available to an unported cylinder
You said you didn’t want to bore us..... so tell us why straight up........ this rain man shit is too much for my rock hard brain!!! Lol
if I made a video that said "full cylinder long barrel ported cylinder short barrel" it would be too short and I'd still have people tell me I'm wrong. as it is despite floging it to death with maths and physics I still have people who don't believe me.
Low guidos god damn math class right here grade 8 algebra
22:00 is tl;dr
TLDR, long barrel + full cylinder = good, short barrel + ported cylinder = good
what type of cylinder do you recommend for an M4A1..??
1. the air turbulence sounds right but is wrong, you need excess air to assist in providing lift, this is why hopups are vented, also the air will only affect it in the first 1-3cm's of leaving the barrel, i have switched between ported and non ported cylinders and had no difference in accuracy at all.
2. i lightly grease my cylinder and o-ring and have never had a vacuum issue, but if you use to much i guess there could be an issue but realistically the pressure will just blow the grease out.
yes the physics make sense and the math is correct but in the real world it makes very little to no difference.
oh thought i should add, the ported cylinders at least in airsoft are for when your running DSG and other extreme round per minute builds as another air intake to work around vacuum issues. some ported cylinders for this reason have 2, 4, or even 6 ports.
I have a 12:1 gear ratio build with non ported cylinder and 155mm inner barrel and I still fire accurate and no issues with feeding. Also I shoot at 1j with a spring rated to shoot one joule or 294 fps with .28 gram bbs
I still don't get why you would want ported??
Then watch the video again...
Why did I get an advert then! You'd better get some ad revenue from this one!!!
Had a bit of a discussion with a guy who said the M82A1 was a "good sniper". I said it was useless because barrel and cylinder can NEVER be in proper ratio. His response was that he had a mate that had one pushing 350 that was "really accurate".
Jehannum just because there's ads doesn't meant the creator gets the revenue
the interesting thing about the Barrett is that it CAN have the correct cylinder/barrel ratio. but the long plastic outer "barrel" isn't a barrel at all. the real barrel actually stops where the receiver ends.
also re ads: I have no idea how the youtube algorithm works but most of my videos get demonetized even the DSG builds that don't have anything "scary" in them. I have tried to understand why some do and some don't, but I always draw a blank.
@@lowguidoschopshop its because you have "guns" in alot of videos. Sure we all know they're toys but youtube sees them like every far leftest. Its a shit system for those that run education channels on fire arms as well as airsoft and gelsoft.
So the answer to the question is to decrease cc
Do you actually mean 1.8 because I’m laying out the math something is not adding up
On which part?
I share it with my dad because he doesn't understand what the difference is
Allowed me to saved 23 minutes of your life and SKIP to 23:20
The reason for ports has nothing to do with the volume of the barrel, you on the totally wrong path. The first things is that air compresses right? So why would the volume of the cylinder compared to that of the barrel have any effect? The reasoning behind ports has to do with fluid dynamics. Think about this, in unported cylinders air beings to compress as soon as the piston is released where with a ported the speed of the cylinder is allowed to increase before air begins to compress. I'll leave you with that for now I suggest you think about this differently. I will begin to make sense I'm just trying to open your mind first. I'll elaborate in coming days.
The air doesn't compress. It is displaced.
Silly
Damn bro ngl I'm not gonna watch a 24 minute video for a simple question. I got you on 2X speed and you're still talking slow.
Anyone can get on the internet and claim this cylinder is pink. But without proof it is all fake news.