Treezooka! DIY Throw Bag Air Cannon
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- čas přidán 23. 07. 2024
- DIY air cannon bazooka for launching throw bags into trees.
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So just built one of these, but I did a PVS SCH40-only version. To measure the height of the fire, I just had my throwline attached and shot straight up. Then measured the amount of throwline taken from the bag. My air chamber was 34" long (with two bends to keep it short enough for a shoulder fire) so that was about 3/4 gallon. I only pressurized up to 55 psi and got about 110 feet in altitude. The 1 1/2" SCH40 PVC is rated to ~200 psi with a breaking point at 2000 psi, so hopefully, I am staying within what is safe. I've seen the same setup used up to 90 psi. I was also thinking of building a new version that is more like a big shot in that it would rest on the ground with a long straight air chamber instead of your shoulder. Thought it might be easier to fire more accurately. But would also want to think of a way to disassemble it with a coupling in the air chamber and/or removable barrel. And might also want a flexible or 45" degree coupling to facilitate sighting. Thoughts? Btw, I was in upstate New York over New Year's out at Niagara and then to Toronto, but was still too far to come by and say hi in person.
Sounds like a good build! I like your technique for measuring the distance -- much more scientific than my "Geeze, looks like 200'!" haha ... after making this cannon I've gotta admit that I seldom use it. I prefer my big slingshot on a stick for some reason. I guess it's just because it's easy to pull out of the truck and shoot. I'm eager to hear if you use it much in the field. Thanks for the update! I kinda wanna build that shoulder mounted cannon if only for the shoots and giggles :)
nice....ive been wanting to build an air canon ( mostly to play with) i have the big shot and the trigger for the pole which makes the accuracy insane... Most of the time it's strong enough to handle trees around here stay safe stay healthy
I gotta get one of those triggers for my bigshot, cuz trying to hold that thing by hand is nuts :)
@@metaspencer it helps tremendously with accuracy also
This is a great build demo! Bit of advice is to have the valve handle operate towards you. That’ll help with aim as you “pull the trigger”
You said it man -- much better once I flipped that around. Less awkward for sure
Hi Spencer!
Always a pleasure to watch your videos! 👍😁😎🤣
big thanks, Stephan ... thanks for checking it out!
Just what I was looking for !! Thanks.
Excellent. Have fun with it!
Love that blaster! I take it is to get a guide rope in the tree!! Enjoying the videos! Keep them coming!
Yeah, what I've found so far is that it gets the guide rope into the tree AND way over it. :) So great for those tall ones but I'll stick to the throw bag for smaller trees.
I have a kinetic water ram that I am going to use to do this. It's basically a tank with a gun trigger for blowing out drain lines. One idea to prevent the gun from over shooting as you described might be to stand on the throw line at a certain length so it goes past the branch then the line stops it and it drops. Also I've used a bow and arrow with fishing line and that worked well.
That kinetic water ram sounds pretty interesting -- cool idea. Fingers crossed for your project!
Ive used bow and arrow many times too. Idk why, they've never said anything, but onlookers especially women always get that scared look in their eye when i pull out the bow and arrow. I use a recurve so i adjust the height by just pulling back more or less. Im planning on building an air cannon bag launcher by using a tire bead blaster and some abs pipe. They have 2 gallon bead blasters with a trigger instead of a ball valve.
awesome and fun video... gonna save the shoulder for sure...need some with the line tied on too see how its gonna affect the flight.. it will have to be a light line and then use it to pull the heavier line up and over? we did same thing with a vac to suck or blow a mouse line through conduit to pull wires or another rope through.
Yeah, I'll have to do some tests with the line before getting out there into the field with it ... I used to pull lines through conduit that way too. It's amazing how far you can suck a plastic bag on a string. Thanks for checking it out, man
I made one with a spring and a trigger. It looked stupid but it was accurate and consistent. One day I should try to make a good looking one. Maybe this will inspire you to make a good trigger and spring system so I can just copy yours. No pressure
A little refinement of aim and pressure chart for height/distance and you'll have a great tool. And a fun one at that
air pressure/height chart will have to go on the bottle ... thanks man
Super cool project!!! For getting it to drop relatively soon after getting over a branch (or whatever), you could always gauge the height and tie off the line a few feet longer (4-5 maybe) than that. The extra few feet of line should cause it drop low enough to cause the bag to wrap on the branch (or whatever) before it springs back toward its origin. Also, I kept thinking of a faster trigger mechanism for it so you aren't expending the whole pressure of the tank every time you fire (specifically, I was thinking of the piston system used in No Country for Old Men, but that was a closed system, so not exactly applicable to this tool).
I'll be doing some practice with the line on the bag this week, so will have to try your method of shortening the distance with the line. Either that or I'll have to get a sense of how pressure and height correspond. Now your idea of not losing all the air is awesome: just a single puff would be nice. There are air-pressure pellet guns (PCP) that work that way, giving you many shots with a single tank of air. That would be oh so cool. Thanks for the ideas man
@@metaspencer It sounds like you're in for a lot of fun dialing this in! I'm excited to see what you come up with.
@@metaspencer pretty sure those have a seperate chamber that is isolated and fills up with every shot
Ha! Brings back memories from 30 years ago...a potato cannon built from pvc and powered by hairspray and set off by pulling a trigger on a piezo lighter sparky thing....the potatoes went so far, you couldn't see where they hit... I always wanted to experiment turning it into a weapon of last resort with various projectiles etc...but that would be BAD.....
I've heard of those old-school spud guns: sounds like a lot of fun and even better if you walk away with all 10 fingers :)
@@metaspencer I was always surprised we never had an explosion or something...
Reverse the ball valve so you pull the leaver to fire - easier?
I think you're right about that one -- would be easier and more natural feeling
My air compressor would be running all day! And I'd tie a line to it so could retrieve all my shots to keep the fun going more quickly.
I've got one dog who will fetch just about anything, so I'm thinking about putting her to work this weekend as my throwbag fetching assistant while practicing with a line on the bag :)
Definitely worth investing in a cheap battery powered tire inflator. You can definitely measire out enough throwline to stop or slow it down and not have it launched WAY past the target. Although if it is fairly close then just throwing it is going to be easier anyway.
That inflation idea is solid!
Pneumatic playtime and crocs?! Spencer, you're the man!
Exactly! blastin' them neighbors. I only lost one throw bag in the shenanigans
Sooooooooooo cooooool...I just used PVC pipe for both air tank and barrel.. wayyyyyyyyyyy lighter and can hold 100psi...😁😁😁😁
That lighter version sounds great ... may have to make a backup for carrying deep into the woods. Thanks man
you can always yank on the line as its going through the crotch to prevent it from going too far
Yup. Absolutely :)
Need line testing. Also look for paintball gun tanks. Lightweight, but maybe not enough volume? Even smaller and lighter weight would be a combustible chamber to do the old potato cannon launcher. Your line length could also prevent overshooting / penetrating your crotch. Keep developing this technology, if only for the views........I suspect this was more about good times then tree line productivity. Glad your keeping busy. I could have use your particular set of skills today. 60 feet pine tree came down last night in a wind storm.
That's quite a blower you had there! You're right about the air cannon: more of a fun thing to fiddle and play with than a tool I desperately need. I was throwing into some towering oaks the other day, though, and it would have been useful. I'll definitely keep and eye out for a lighter and smaller tank: that one almost needs a crane to carry it :)
Getchu a dowel rod to push the bag down. When you mentioned wadding, I was thinking musket!
Tree musket! Yep, I've been using a stick (almost as fancy as a dowel) and it's working. Haven't even blasted myself in the face yet
I knew that the comments would not disappoint 🤣🤣 is this guy still with the living 🤣
haha ... no one likes the idea of looking into a loaded gun I guess :)
Kool .
Height in straight up (vertical) shooting is easy to measure. All you need is a timer. Consider that bag velocity is 0 at the top. It is basically a free fall equation (disregarding air friction).
Free fall equation is h = 1/2*g*t^2, where t is a half travel time from the max height.
In your case, if your measure time since start till fall, as T (say 20 sec), t will be T/2 (10sec). And final formula will be h = 1/8*g*T^2
Example:
Say T (from start till fall) = 20 sec
h = 1/8*9.8*(20sec)^2 = 490meters
Woah! The mathman cometh! Thanks… I’ll give it a try
You never fail to entertain! I'm still catching up on your videos from my hiatus but you have really been a busy guy. Looking forward to seeing what you've been doing.
Catching up! I'm flattered. Yeah, we try to stay busy around here :)
No doubt, you had a lot of fun making and using this tool
😀
(no comment on the color of it 😁)
it's the bright green launching machine! :) having experimented with flinging a wide variety of objects now, I think it's a keeper
@@metaspencer It can also be useful to throw the ball to the dogs and be quiet for a while :D
You need to test with the line. It will act differently. Could probbly break on the line. The aiming part though .. thx
yeah absolutely ... someone else mentioned that the line might even arrest the bag in a useful way, so I'll have to test more before I'm at someone's house blowing their windows out :) thanks for checking it out, man
If you needed to drop line over some Sequoia Redwoods, that's the tool for you! Nice job!
Oh to some day climb one of those big boys! :)
It can't go farther than the line you attach to it is long. So if you have a good eyeball for distance you govern its travel by how long the line is and experience of how much drag that puts on the blast.
Good idea … thanks man
Thinking of making or buying the DTX shoulder launcher, main question is do you actually use this thing after the novelty has worn off?
The truth is I NEVER use it. The big shot hits everything I ever climb and doesn’t need air refills
@@metaspencer kinda what i was thinking, thankyou
Try an inflator air tank used for beading up tires.
Oooo, I know those tanks: nice and big! Also affordable. Great idea.
When the music came on at 2 minutes in, I thought I opened a 'That Chapter' video by accident lol
Whaaa! funny :)
@@metaspencer It's one of the better royalty-free tracks for sure. Just wanted to add that I'm thankful for your solo tree work videos, they give me confidence that soon I can start doing tree work myself. Slowly putting together my collection of necessary gear. Did you work for an established company before you did solo work?
@@WeAreTheSHWE Cool to hear that you're heading into the tree biz. I come from a climbing background but never worked for a tree company/service ... I think working for an established company is a great way to learn, though.
@@metaspencer Thanks for the response. That's been my main dilemma. Working for a company first is probably the most responsible path when it comes to learning the ropes (pun intended), but I was always my own boss in other ventures. My main concern with starting off is getting insured without certification. I hope it's possible.
@@WeAreTheSHWE I've never encountered certification questions re: insurance, but ya never know. All of my insurance companies have just been concerned with $$ and activities. Good luck!
I just used pvc for my air tank. Alot lighter. I wrapped it with duct tape just in case it cracked. Looks awsome tho
I'm thinking a lighter version like yours would be a good idea and take up less space in the truck. thanks man
@@metaspencer . I made it so the barrel unscrews so its 2 pieces. Easier to store and transport. Plus i made a couple different sized barrels. 1 shoots tennis balls, 1 for throw bags
@@megadosevitaminc8774 oh man, awesome ideas ... I like it! okay, I'll have to keep tinkering
Noticed that you were attaching a copper fitting on the steel tank.
Joining copper to steel is not recommended due to the resulting galvanic corrosion between copper and steel.
Thanks for the tip ... it still looks like the day I put it together but perhaps over time it'll degrade. I'll keep and eye on it
How you gonna add a clamp around the top end of that a pipe on your throw bagger air tank and then bring 2 pieces of PVC that you hold at an angle you know Adam V on the ground and then set it on the ground and name it where you want to and then learn to have whatever pressure for the go to high to you want anyway I just thought that my bill suggestion
I like that idea -- and I could create a chart with air pressure and heights and stick it to the side of the bottle. Great idea man. I'll have to get the bugs sorted out. thanks
Can i use jb weld instead of using the torch
It's worth a try! just be careful when pressurizing the JB weld to make sure it's holding well
Put the bag in b4 pressurising. If you bang it on the ground the valve can crack open a tad and that's all it takes to shoot that bag into your eyes. Cheers
Absolutely. Great ideas thanks
6:58 if you're using the fire extinguisher too
My one employer had a potato gun I think I worked of off air and starting fluid it had a built in ingator
That sounds like a wild potato gun! I've heard of those but have never fired on :)
You can calculate how heigh the ball went by knowing the firing angle and how far it went.
Oooo, math! Love it! Okay, I'll work on that. Big thanks!
I would put the bag in first then air it up. Safer that way. That sucka would hurt to take a face hit. That thing is awsome tho...
I was watching the vid and thinking to myself "Dang bro, you put your face in front of the barrel how many times?" So yeah, needs to be treated more like a gun than a toy :)
@@metaspencer haha, i was thinkin the same thing. We blastwd a pumpkin with some big jolts to test ours.
Just thought of bow and arrow.🤔
🏹🎯
Woah! Now that's taking a potato canon to another level. May explain why my neighbor (she's 91) was watching my "test" so closely
Thread the valve all the way using a real threader jig, not with your impact driver. Don't look down the tube even if the ball valve is there: Push your throw bag down with a hollow tube. Better safe than sorry.
good tips -- thanks man
So I am not trying to be a "safety police" on here, but in watching this video would it not be safer to LOAD THE BAG prior to pressurizing the tank?
When I saw you dropping the bag into the barrel and looking down into it I just shuddered thinking what COULD happen.
A blast to the eye would be so, so bad! Good point man ... fun cannon for sure
I was thinking the same!
With that steel tank it will be too heavy to lug around out in the field. Using a sprinkler control valve to release the air would be smoother.
great ideas. thanks man
I would have mounted the valve for pull down to release. Good test though.
Yeah I see your point there ... it's a great tool for high shots
@@metaspencer I did like and subscribe though.
Has anybody figured out yet that ABS piping is stronger than PVC what a concept
I have a potato gun, with a 1.5 inch barrel, I might have to try this out soon, only issue, it has an electronic valve, so i have to carry a battery with me, but itll be fine
I've heard from another dude that the electric valves are nice and smooth, though, so there is that benefit :)
@@metaspencer I wouldnt say smooth, (solenoid valve) but hella fast opening, near instant, but expensive as well
@@metaspencer I just bought a notch sentry, if it gets here soon, I can try it out this weekend, how much do you like yours? I dont care much about it, so long as its better than my rock climbing harness
@@WoodCutr1 The only problem I have with the harness, which I generally like a lot, is that I got the smaller size and my ass doesn't perfectly squeeze into it :) So yeah, it's a good basic harness. I've modified it a bit which I'll cover in that video
sounds good
i did not see any OPD (over pressure device) installed. Any and all pressure vessels should be equipped with an over pressure device to prevent over pressuring. when you removed the original nozzle you most likely removed the built in OPD. great project though. another thought, reverse the ball valve so you have a pull to release rather than a push to realease.
Good ideas and thanks for the note on the pressure valve. I've still got it and should reinstall. Thanks
Ok so tonight I watched several DIY bag cannon video, but I'll have to say yours is the only one that's Military Grade. You also need a FOID card to own one in your state LOL. You've out done yourself buddy.
FOID for sure. Haha. Thanks man
Where did you get the schrader valve with the threads?
Amazon I think … gotta search a bit
@@metaspencer I found em at home depot surprisingly. Thanks
Excellent
@@metaspencer Is your schrader valve 1/8" or 1/4"? Don't think it will make much of a difference. Just a bit curious. Thanks
That’s a detail I can’t remember… sorry
I was wanted to build a potato cannon, and now I have a new way of doing it 😍
absolutely: potatoes, glitter, tubes full of spaghetti ... there is not limit to what this baby will launch :)
Is that your basement? If so you are so lucky.
Workshop ... yeah, it was a good one! (sold the place tho)
Well, did you ever find it, or did the trees eat it like Charlie Brown's kite?
haha ... yeah, at least one throw bag vanished during testing. :)
I notice when you fire it, it pulls your aim I. The direction.that you're pulling the lever. I've heard of people using a solenoid valve from a lawn sprinkler system. Said valve, a 9v battery and a switch and you have yourself a rapid release at a "pull of the trigger" without sacrificing aim
Oh dang that's a cool idea. I used to install those valves all the time when I did irrigation system work. And you're right: my aim is lousy and getting pulled off at the last minute. Thanks man!
Turn your valve around so you pull it toward you. Would make it more convenient and easier to aim.
Great build. I’m gonna do it.
Good idea. It's all about the little tweaks ... that thing rips
Check out Jorge Spave'e rubber strap trigger for a ball valve. That would be a beautiful thing, I think.
Your valve is in the wrong direction. Pulling the valve to open is way more controllable.
I've heard that from a few others ... makes sense!
I love your pressure chamber. I used about 20 inches of 4 inch pvc rated for 330 pounds. I put a pressure gauge on it as well. I shoot 12 oz bags which fit perfect. It shoots at least 150 feet high at 120. You have to calibrate the cannon to pressure vs height which is tricky. The only problem is it can shoot over several trees lol.@@metaspencer
@@emzzzz992 yeah I've had that same problem -- sometimes the canon has TOOOOOOO much power and the bag gets into the next trees. Your build sounds cool!
You didn’t try flipping the bag?
Yep great idea ... works well that way
Lmao wyd with a multiple thousand PSI kitchen suppression system charge tank???? Where you get that.
a buddy gave it to me ... that thing BLASTS
Shooting at trees is good content. Watching dogs is GREAT content!
there ya go ... the pups were a bit freaked out by the air cannon at first, but I'm guessing if I launched a squirrel out of it they'd be convinced
Kinda dangerous to slam it on the ground In order to make the bag drop, if for some reason it went off you would be fkd. Need push rod.
push rod! great idea. yeah, watching the video I kept thinking to myself "Dang, I'm lucky I didn't blast myself in the face" ... so it'll take some practice
Кран должен открываться в твоём направлении, к себе, а не от себя, так будет удобней
Да, хорошая идея. Спасибо!
Please load the throw bag and THEN pressurize. You're pointing a loaded gun at your noggin.
Good point! Thanks man