It's called a "Bernoulli Pump" and we used them in the Navy to multiply the volume of water that our pumps could move, for about the same power. A stream of moving fluid (air being a fluid here) tends to draw surrounding fluid along with it. the air is compressed and pressurized by the plunger, pushing it against the primed dart, and the release is the air rebounding like a spring let free: equal and opposite reaction means the launcher and the dart air pushed away from each-other. upon release; the air is high pressure at the face of the plunger and the rear face of the forward dart, but it's motion in the middle is suddenly flipped to low pressure. (until equilibrium is reach based on the mass of the air, if your barrel were long enough and the system were sealed, you could stop the dart dead in the tube as the air is "stretched", until it's density (and thus, pressure) is too low: making a vacuum force where atmospheric pressure is pushing the dart into the blaster, rather than out.) (this flip commences from about the middle of the mass of the compressed air, and radiates outward rapidly) the low pressure of the moving air "sucks" (rather, the higher pressure of ambient air is pushing) the dart forward. If you ran constant air through it with a compressor air tank, you could continuously feed darts into it without having to feed them all the way in front of the moving air: the Bernoulli Effect would draw them forward into the moving stream of air. EDIT: spelling
"If you ran constant air through it with a compressor air tank, you could continuously feed darts into it without having to feed them all the way in front of the moving air" Sounds to me like Matt needs to look into a fully automatic nerf air-tank-powered blaster now!
So are you saying the plunger system is not necessary, and it can be replaced with a compressor or that the plunger system can have the air compressor feed darts as it recocks without pulling air ?
im loving all of these stupid simple solutions to things, like putting water on the dowels to make them expand. The blaster's design is also pretty awesome
Honestly, probably the best "build explanation" section I've seen out of any of the building channels I watch, because you went step by step on everything and explained how you did pretty much every little section, while most building channels tend to just cover the key points.
I think the key moment for the back dart is when the front dart exits the barrel. The higher pressure air is then connected to the outside atmosphere, which sucks it forward, which in turn propels the back dart as a temporary low pressure region is created behind the air wave escaping the barrel.
Gotta admit, the dart head as a dampener is pretty smart. Love your ideas, may not be good for quick firing, but they work and its goofy yet useable and reliable.
The dart moves forward because the air mass in the barrel has a ton of energy. When the main piston stops moving and the air mass in the tube wants to keep going, it creates a massive vacuum that sucks the dart into the barrel. This is legitimately how engine performance exhaust headers work to clear the combustion chamber of all spent gasses and allows the chamber to be under vacuum for the next intake cycle.
I was expecting the venturi effect, and we observed the venturi effect here... just not exactly how I imagined. Firing creates a low pressure zone in the chamber, which pulls the rear dart forward. Pressure differential isn't nearly enough to fire the dart all the way through, of course, as we see. Brilliant build, I love it.
It is not the venturi effect though. Venturi effect exists in a steady state flow, and the reduction in pressure from the venturi effect is only a reduction of pressure relative to the flow itself. When you have hundreds of psi pressure in an airgun you're not going to get a drop below atmospheric pressure (14.7 psi). Rather what we see is a pressure drop after the firing sequence because the air in the barrel had momentum and continued to travel out. Only a momentary pressure drop, a single pulse of low pressure, not a steady state process like venturi.
Dude, I gotta say your fabrication techniques are really smart. By the 5 minute mark I had learned 3 new things for fabrication. Heve you ever thought of doing a series on fabrication?
Holy cow, this channel's production quality has skyrocketed since I first subbed. Great to see the work you continue to put into making these projects!
The reason why the dart is pulled by the action is probably the same reason behind a "vacuum ejector", the movement of a higher pressure air passing through a channel can create a vacuum.
You’re a very naughty youtuber, but the sheer quality of the video more than makes up for that. Seems pretty obvious why the 2nd dart gets pulled into the breech - the momentum of the air leaving the barrel causes a momentary vacuum which sucks it forward.
Cool video as always! I wonder if you've ever considered making a "shell" or "cover" for one of these completed projects to go around the components to give it that finished Nerf blaster look, just for fun.
The inertia of the air flowing out, after the first piece left the barrel, creates a bit of lower pressure at the end of a firing sequence which drags the second one in a bit.
I think its sucking the second dart forward, thats why it stops 'on a dime' over the air port. There's a small rebound of the plunger and a wave of air returning in the front of the barrel.
Actually, you can defy physics, physics being the systems of math we use to predict how reality interacts with itself. Defying these predictions leads to new and better physics! But good luck doing that with a nerf blasters; usually it takes a Large Haldron Collider!
Love this kind of content. I'm trying to remake my nerf collection after mom sold it (without my consent). I might just start building my own blasters!
I love not just how much planning you put into this, but also how you did everything properly. No "let's eyeball some markings for the drill and then yolo it" as I see so many other creators on youtube doing. I appreciate how much thought and diligence you put into this
Dude you are such an awesome channel! It’s fascinating watching you build these and all the unique techniques you use, like just adding water to expand the wood, I’d have never thought of that.
Oh, that is so cool! My initial thoughts on how this might work led me to a different idea... -plunger pulls from front to back -Muzzle is capped with a moving cover -Pull a vacuum in front of the dart and put the pressure behind it -when the plunger bottoms out (or some threshold is hit) open the muzzle cover basically a combination pressure and vacuum cannon. Hmmmmmmm
this is cool. Seems like another variation of the "inline clip". Been using inline clips in most of my projects and this opens up many more awesome potential for this kinda ammo reloading.Thanks
Wow. These nerf blasters are getting better and better. You should try making a nerf blaster machine gun that can be set up on your car or something. Maybe even add a place where you can sit to control it by hand instead of remote control
Gotta love when ppl describe shit with phrases like “this defies physics” followed by demonstrating and/or directly explaining the physics and why it’s functioning exactly as it should.
Dude, I'm so impressed by your techniques for making this blaster. The pen thing, centering the pipe, trigger mechanism, etc. I'm certainly no expert myself, so maybe I'm being impressed by some pretty basic stuff. But I feel like my mind has expanded from watching you work
It’s over pressure. As the other dart is being blown through, there is still an air gap behind it, which is likely drawing the other dart through, until the first dart exits.
To test if it’s a drop in air pressure in the barrel is what moves the dart forward, you could test using shorter barrels so that there is still pressurized air when the dart leaves the barrel.
The rear dart is moving forward because you are not dumping the same volume of air in to the barrel as the there is in the barrel when each darts are on opposite sides. This is creating a small vacuum right before the front dart leaves the barrel. Two options to fix this. One shorten the barrel or two make the compressed air chamber bigger.
simplest explanation i can think of: fast air has lower pressure so once that pressurized air expands and accelerates it actually drops below outside pressure and the second dart moves forward from the pressure difference
Your conception of mechanics is very intuitive and brilliant. I'm impressed. I'm an engineer/machinist and I would of done things slightly differently but that doesn't make your way wrong in any way. Well done. Very smart.
Slick build! And I love how you're bringing so much innovation to pump action PVC blasters. This is some truly DaVinci stuff; breathing new life into the old arts. My theory for why the dart is pulled forward is a slightly off-tune barrel. I'm sure you calculated the plunger and barrel volumes, but I bet there's a bit of leakage when the blaster is fired, meaning there's not quite enough air to fill the barrel. So the momentum of the shot dart can pull the barrel pressure a bit low, sucking the second dart forward. I'll leave it up to you to see if this is a feature or a bug 😂
Bernoulli's principle is probably drawing the second dart forward. You can check by loading just one dart and providing a constant stream of air through the barrel.
Reducing the length of the barrel would let you know when friction is more powerful than the reduction of air pressure and you would notice this by the rear seal dart not moving forward. Or a stiffer spring moving faster might allow an even longer barrel, tunable again by not allowing the rear dart to nudge forward. Very awesome mechanical engineering and very awesome build ! Impressive!!!
Likely, when the round leaves the barrel, that’s creating a temporary pressure drop beyond negative, like if you were to plug the hole with your finger and then pop it out, you can feel the suction.
My hypothesis is that the rear dart is pulled forward by the high speed air entering the barrel in front of it. As fluids speed up then decrease in pressure and this low pressure will pull the rear dart forward until it blocks the air hole. Hence the short distance moved.
If what you said about the internal pressure being less than the external pressure (10:02), then you need to decrease the barrel length or increase the pressure to increase the bullet velocity. That suction force that pulls the rear dart forward is also slowing down the forward dart.
I think that effect is the same principle as fluid hammer ('water hammer') Though the net pressure never drops below atmosphere, gas movement has an inertia that creates a vacuum when the plunger suddenly stops. This similar in principle to the Venturi effect, though the configuration likely means it is not truly Venturi
All the ways you compensate for not having a milling machine are such good ideas. I learnt so many hacks for ghetto precision! I don’t have a milling machine so I wouldn’t know if it would play nice with that pipe.
I have recently begun building my own homemades (following nerfhaven guides) and I am inspired by your precision and ingenuity. They make me want to bring another level of polish to my blasters :) keep up the great work!
The reason i think the dark that is loaded moves up into the chamber is due to a vacuum being formed. As the first dart ejects out of the barrel it creates a tugging force or vacuum, and the other dart wants to move to help reduce the vacuum as the air on the other side wants to get in. But once the first dart leaves the barrel the vacuum dissipates as air rushes into the barrel of the gun. leaving the second dart ready to to fire.
Could be a little bit of vacuum loading, too. Very cool concept. Surprised at it's power for being such a simple breach. I've been looking for a simple sniper lol
This is perfect for me to learn Some videos just don’t explain in a way where I understand enough to build my own functional version. And I looked EVERYWHERE and this was just randomly recommended to me. I am so happy! Nice video!
Pressure difference. The plunger creates high pressure that escapes through the barrel and propels the first dart out. This action causes short but sgnificant enough moment of low pressure like in vacume cleaner that sucks the second projectile inside the barrel. Powerful enough to suck it in but weak enough to not double fire.
My first thought about the second dark moving forward is that it probably has something to do with Bernoulli's principle and as the first start gets farther away the air pressure probably drags the second dart forward a bit
I wouldn't be shock if all that is happening is the first dart is creating a vacuum strong enough to forcefully drag the second dart forward in the loading chamber.
That is quite interesting. It seems as though the dart created suction pulling the second into the chamber. I'll bet that if you cut the barrel shorter, it would actually improve FPS as opposed to lengthening to increase the autoloading effect. Perhaps a telescopic barrel or variable pressure valve as a fire select mechanism?
i dont know much about how nerf guns work. so when you explained how they *usually* function, and then immediately threw that explanation out of the window my small brain imploded.
![[TH] 2024 PMGC League | Survival Stage วันที่ 1 | PUBG MOBILE Global Championship](http://i.ytimg.com/vi/FVFT-PFwU80/mqdefault.jpg)
No subscription for clickbating losers!!!
Agreed
lol why was this pinned xD
It's called a "Bernoulli Pump" and we used them in the Navy to multiply the volume of water that our pumps could move, for about the same power. A stream of moving fluid (air being a fluid here) tends to draw surrounding fluid along with it.
the air is compressed and pressurized by the plunger, pushing it against the primed dart, and the release is the air rebounding like a spring let free: equal and opposite reaction means the launcher and the dart air pushed away from each-other.
upon release; the air is high pressure at the face of the plunger and the rear face of the forward dart, but it's motion in the middle is suddenly flipped to low pressure. (until equilibrium is reach based on the mass of the air, if your barrel were long enough and the system were sealed, you could stop the dart dead in the tube as the air is "stretched", until it's density (and thus, pressure) is too low: making a vacuum force where atmospheric pressure is pushing the dart into the blaster, rather than out.)
(this flip commences from about the middle of the mass of the compressed air, and radiates outward rapidly)
the low pressure of the moving air "sucks" (rather, the higher pressure of ambient air is pushing) the dart forward.
If you ran constant air through it with a compressor air tank, you could continuously feed darts into it without having to feed them all the way in front of the moving air: the Bernoulli Effect would draw them forward into the moving stream of air.
EDIT: spelling
"If you ran constant air through it with a compressor air tank, you could continuously feed darts into it without having to feed them all the way in front of the moving air"
Sounds to me like Matt needs to look into a fully automatic nerf air-tank-powered blaster now!
So are you saying the plunger system is not necessary, and it can be replaced with a compressor or that the plunger system can have the air compressor feed darts as it recocks without pulling air ?
That's probably what's going on here. It somewhat reminded me of barrel evacuators on tanks and how they pull the smoke out of the barrel.
@@kilotheneko2064yes, you know some odd vacuums are made this way.
sounds to me like a mouth powered atomiser ( www.google.com/search?q=mouth+atomiser )
im loving all of these stupid simple solutions to things, like putting water on the dowels to make them expand. The blaster's design is also pretty awesome
e x p a n d
Bigmode@@matt_yuan
That's so brilliant.
To be fair I wouldn't be surprised if Matt could find a way to defy physics
Because he can.
that pen holder from the beginning is very clever!
ty!
His entire way of machining is genius
Honestly, probably the best "build explanation" section I've seen out of any of the building channels I watch, because you went step by step on everything and explained how you did pretty much every little section, while most building channels tend to just cover the key points.
Genius, not because of the blaster design but how smart you were manufacturing it
That drill press balance is such a good idea
The dart is so excited for it's turn to get launched, that it wiggles forward into the barrel.
Matt, your production quality has actually gotten that of a professional.
tyty
Your English has actually gotten that of an amateur
0:40 my guess is how vaccums work
Welp it was simpler than expected.
I think the key moment for the back dart is when the front dart exits the barrel.
The higher pressure air is then connected to the outside atmosphere, which sucks it forward, which in turn propels the back dart as a temporary low pressure region is created behind the air wave escaping the barrel.
o7 rip sacraficial dowels
they will not be forgotten
@@matt_yuan type F in the chat
F
F
F
I love how this channel grew from simply modding a long shot and now defying physics itself
Gotta admit, the dart head as a dampener is pretty smart. Love your ideas, may not be good for quick firing, but they work and its goofy yet useable and reliable.
Your resourcefulness and clever tricks are a treat to watch and make you more defined from other channels
The dart moves forward because the air mass in the barrel has a ton of energy. When the main piston stops moving and the air mass in the tube wants to keep going, it creates a massive vacuum that sucks the dart into the barrel. This is legitimately how engine performance exhaust headers work to clear the combustion chamber of all spent gasses and allows the chamber to be under vacuum for the next intake cycle.
Yep. Great explanation, man. It’s all down to momentum.
I was expecting the venturi effect, and we observed the venturi effect here... just not exactly how I imagined.
Firing creates a low pressure zone in the chamber, which pulls the rear dart forward. Pressure differential isn't nearly enough to fire the dart all the way through, of course, as we see.
Brilliant build, I love it.
It is not the venturi effect though. Venturi effect exists in a steady state flow, and the reduction in pressure from the venturi effect is only a reduction of pressure relative to the flow itself. When you have hundreds of psi pressure in an airgun you're not going to get a drop below atmospheric pressure (14.7 psi). Rather what we see is a pressure drop after the firing sequence because the air in the barrel had momentum and continued to travel out. Only a momentary pressure drop, a single pulse of low pressure, not a steady state process like venturi.
Very clever ideas in this project, but the production value of the video is what really impressed me. You've put a lot into this video and it shows!
Have you ever brought your builds to a game? Would be cool to see it used in action as well. But the build process is awesome keep up the great work.
nope
@@matt_yuan 😥
@@matt_yuan You really should, all of your stuff is very cool and reminds me of old Nerf homemades
I have a suggestion for the next blaster. Try and design, a ww1 era, open-bolt rifle, fed by clips ofc, really wanna see your take on that
Dude, I gotta say your fabrication techniques are really smart. By the 5 minute mark I had learned 3 new things for fabrication. Heve you ever thought of doing a series on fabrication?
Holy cow, this channel's production quality has skyrocketed since I first subbed. Great to see the work you continue to put into making these projects!
The reason why the dart is pulled by the action is probably the same reason behind a "vacuum ejector", the movement of a higher pressure air passing through a channel can create a vacuum.
You’re a very naughty youtuber, but the sheer quality of the video more than makes up for that.
Seems pretty obvious why the 2nd dart gets pulled into the breech - the momentum of the air leaving the barrel causes a momentary vacuum which sucks it forward.
Everything about this build is clever and shows your skill as a designer ‘and’ craftsman. Well done!
Cool video as always! I wonder if you've ever considered making a "shell" or "cover" for one of these completed projects to go around the components to give it that finished Nerf blaster look, just for fun.
i like the unfinished look
@@matt_yuan If that's your preference no worries, was just curious if it had ever crossed your mind. Appreciate the reply!
I’ve been here since your first video. You’ve come a long way.
Modern day RSCB
Exactly what I was thinking... late 2000s design, but with much better production value than the old homemades.
I automatically knew it uses vacuum pressure basically
The inertia of the air flowing out, after the first piece left the barrel, creates a bit of lower pressure at the end of a firing sequence which drags the second one in a bit.
Almost right but air can't drag anything, it can only push.
I think its sucking the second dart forward, thats why it stops 'on a dime' over the air port. There's a small rebound of the plunger and a wave of air returning in the front of the barrel.
I'm with you on this. I'd be curious to see what happens when a shot is taken with the back retaining piece held out of the way.
Nice work as always! Thanks for the useful techniques to accomplish that precise slot on the cylinder.
Nice clickbait title- you cannot defy physics. *Rings a bell* SHAME! *repeats forever*
More like "defies your intuition of physics"; would be clickbaity enough while not being a false statement in lots of cases
Oh you can defy physics, it just never works out.
It's not really clickbait, because everyone understands that...
More like...... eh.....idk
Actually, you can defy physics, physics being the systems of math we use to predict how reality interacts with itself. Defying these predictions leads to new and better physics!
But good luck doing that with a nerf blasters; usually it takes a Large Haldron Collider!
2:00 im pretty sure a normal ruler would have worked too.
MAKE A MAGAZINE FOR THIS 🗣️🗣️🗣️🗣️🗣️🔥🔥🔥🔥🔥🔥🔥
Love this kind of content. I'm trying to remake my nerf collection after mom sold it (without my consent). I might just start building my own blasters!
I met you and open sauce and shot the blaster you had there. it was super cool! thanks for letting me try :)
Wake up there’s a new Matt yuan video
Venturi. At least that is my first thought.
mate bloody good job, amazing work
I love not just how much planning you put into this, but also how you did everything properly. No "let's eyeball some markings for the drill and then yolo it" as I see so many other creators on youtube doing. I appreciate how much thought and diligence you put into this
Dude you are such an awesome channel! It’s fascinating watching you build these and all the unique techniques you use, like just adding water to expand the wood, I’d have never thought of that.
I'm in love with your builds. You should build nerf blasters for NASA.
Oh, that is so cool! My initial thoughts on how this might work led me to a different idea...
-plunger pulls from front to back
-Muzzle is capped with a moving cover
-Pull a vacuum in front of the dart and put the pressure behind it
-when the plunger bottoms out (or some threshold is hit) open the muzzle cover
basically a combination pressure and vacuum cannon. Hmmmmmmm
this is cool. Seems like another variation of the "inline clip". Been using inline clips in most of my projects and this opens up many more awesome potential for this kinda ammo reloading.Thanks
I had this really cool science teacher in 6th grade and he help made me fall in love with science and you remind me of him
Love all the creative solutions to make do with what you got!
hey, your editing is getting pretty good. I'm really looking forward to seeing you improve even further.
im probably making this overly complicated but fitting a aloff’s device to the blaster and linking it to the pump handle would be awesome
It's interesting to note that nothing can "defy physics." Anything that appears to is only illustrating something we may not have known already.
There are so many smart build tips for working with tubes! Great video!
Who are you, who are so wise in the ways of science?
Wow. These nerf blasters are getting better and better. You should try making a nerf blaster machine gun that can be set up on your car or something. Maybe even add a place where you can sit to control it by hand instead of remote control
You are doing homemade designers proud! Build on!
skewers r cool
Gotta love when ppl describe shit with phrases like “this defies physics” followed by demonstrating and/or directly explaining the physics and why it’s functioning exactly as it should.
New Matt Yuan video? Ok!
I'd say the reason why the next dart is brought forward is due to the Venturi effect
Not the Venturi effect, it’s actually another application of Bernoullis principle, so pretty close.
The charge of air leaving the barrel has inertia, so it will draw a vacuum as it exits.
Dude, I'm so impressed by your techniques for making this blaster. The pen thing, centering the pipe, trigger mechanism, etc. I'm certainly no expert myself, so maybe I'm being impressed by some pretty basic stuff. But I feel like my mind has expanded from watching you work
Oh my goodness I get to see a Matt yuan video less than an hour after he posted
You’re the hero we don’t deserve my friend. Seeing you continue to develop traditional nerf modding give me the warm fuzzies
It’s over pressure. As the other dart is being blown through, there is still an air gap behind it, which is likely drawing the other dart through, until the first dart exits.
To test if it’s a drop in air pressure in the barrel is what moves the dart forward, you could test using shorter barrels so that there is still pressurized air when the dart leaves the barrel.
The way it works is great, but those practical tricks you used when actually making it earned my subscription.
The rear dart is moving forward because you are not dumping the same volume of air in to the barrel as the there is in the barrel when each darts are on opposite sides. This is creating a small vacuum right before the front dart leaves the barrel. Two options to fix this. One shorten the barrel or two make the compressed air chamber bigger.
Nice work!
The first dart doesn't have enough volume of air pushing it, so the first dart creates a tiny vacuum and pulls dart 2 forward.
simplest explanation i can think of: fast air has lower pressure so once that pressurized air expands and accelerates it actually drops below outside pressure and the second dart moves forward from the pressure difference
Man the engineering genius that went into designing this thing is insane and it deserves some respect and recognition 😊
Your conception of mechanics is very intuitive and brilliant. I'm impressed. I'm an engineer/machinist and I would of done things slightly differently but that doesn't make your way wrong in any way. Well done. Very smart.
thanks!
This weird thing is also how vacuums with no moving parts and powered by compressed air work
Slick build! And I love how you're bringing so much innovation to pump action PVC blasters. This is some truly DaVinci stuff; breathing new life into the old arts.
My theory for why the dart is pulled forward is a slightly off-tune barrel. I'm sure you calculated the plunger and barrel volumes, but I bet there's a bit of leakage when the blaster is fired, meaning there's not quite enough air to fill the barrel. So the momentum of the shot dart can pull the barrel pressure a bit low, sucking the second dart forward.
I'll leave it up to you to see if this is a feature or a bug 😂
I'd love to build some of your designs to add to my homemade collection. Awesome work!!!
i love the trigger spring. using a nerf dart tip is so smart but simple, and yet, very few would have thought of that.
The pen-holding technique garnered my subscription. I can't wait to share it (and your channel) with our maker co-op folks!
Bernoulli's principle is probably drawing the second dart forward. You can check by loading just one dart and providing a constant stream of air through the barrel.
I wonder if this will work with an XBZ as the air source?
Reducing the length of the barrel would let you know when friction is more powerful than the reduction of air pressure and you would notice this by the rear seal dart not moving forward. Or a stiffer spring moving faster might allow an even longer barrel, tunable again by not allowing the rear dart to nudge forward. Very awesome mechanical engineering and very awesome build ! Impressive!!!
Likely, when the round leaves the barrel, that’s creating a temporary pressure drop beyond negative, like if you were to plug the hole with your finger and then pop it out, you can feel the suction.
My hypothesis is that the rear dart is pulled forward by the high speed air entering the barrel in front of it. As fluids speed up then decrease in pressure and this low pressure will pull the rear dart forward until it blocks the air hole. Hence the short distance moved.
This looks like a bit of the Venturi effect drawing the rear dart forward after the first dart is fired.
If what you said about the internal pressure being less than the external pressure (10:02), then you need to decrease the barrel length or increase the pressure to increase the bullet velocity. That suction force that pulls the rear dart forward is also slowing down the forward dart.
I think that effect is the same principle as fluid hammer ('water hammer')
Though the net pressure never drops below atmosphere, gas movement has an inertia that creates a vacuum when the plunger suddenly stops.
This similar in principle to the Venturi effect, though the configuration likely means it is not truly Venturi
What I like most about this kind of videos are the solutions that are given to problems in ways I'd never imagine!
All the ways you compensate for not having a milling machine are such good ideas. I learnt so many hacks for ghetto precision! I don’t have a milling machine so I wouldn’t know if it would play nice with that pipe.
I have recently begun building my own homemades (following nerfhaven guides) and I am inspired by your precision and ingenuity. They make me want to bring another level of polish to my blasters :) keep up the great work!
The reason i think the dark that is loaded moves up into the chamber is due to a vacuum being formed. As the first dart ejects out of the barrel it creates a tugging force or vacuum, and the other dart wants to move to help reduce the vacuum as the air on the other side wants to get in. But once the first dart leaves the barrel the vacuum dissipates as air rushes into the barrel of the gun. leaving the second dart ready to to fire.
these are some excellent blaster videos, keep it up :3
Could be a little bit of vacuum loading, too. Very cool concept. Surprised at it's power for being such a simple breach. I've been looking for a simple sniper lol
This is perfect for me to learn
Some videos just don’t explain in a way where I understand enough to build my own functional version.
And I looked EVERYWHERE and this was just randomly recommended to me.
I am so happy!
Nice video!
Pressure difference. The plunger creates high pressure that escapes through the barrel and propels the first dart out. This action causes short but sgnificant enough moment of low pressure like in vacume cleaner that sucks the second projectile inside the barrel. Powerful enough to suck it in but weak enough to not double fire.
My first thought about the second dark moving forward is that it probably has something to do with Bernoulli's principle and as the first start gets farther away the air pressure probably drags the second dart forward a bit
bro made a nerf recoilless rifle
I wouldn't be shock if all that is happening is the first dart is creating a vacuum strong enough to forcefully drag the second dart forward in the loading chamber.
That is quite interesting. It seems as though the dart created suction pulling the second into the chamber.
I'll bet that if you cut the barrel shorter, it would actually improve FPS as opposed to lengthening to increase the autoloading effect.
Perhaps a telescopic barrel or variable pressure valve as a fire select mechanism?
Using dowels to support the drill bit was genius and I wish I knew that sooner
Something may defy your understanding of physics, but nothing defies physics.
As someone who is not familiar with this space, The sheer amount of little tricks in this video is so cool
I think it’s drag of the air passing the second darts tip and the barrel pressure behind the first dart prevents it from fully entering the barrel
i dont know much about how nerf guns work. so when you explained how they *usually* function, and then immediately threw that explanation out of the window my small brain imploded.
That "let's go 🎉" at the end was the cutest thing