Massive 3D-Printed ROCKET Slugs - First Test

A viewer designed and created some rocket slugs for us to test. Will they be more accurate than the Gyrojet rocket rounds? These are quite large, almost twice the size of a normal slug. With these tests, I am sure we will get many ideas for improvement for future designs and maybe another viewer will submit their design for us to try out.
I expected many failures with these, but was pleased so many ignited and most were quite accurate.
Thank you Patreon supporters!
/ taofledermaus

[@Silasssssssss]

This is the beginning of a fully functional Bolter

[@weirdscience8341]

It's totally doable just upscale a gyrojet to 40mm and add a warhead oh I want a bolter 😭

[@mr.pavone9719]

@@weirdscience8341 I want one too but the magazine would only be able to hold 5 rounds tops if it were kept in proportion. .50 Cal would be better but 20mm might work as well.

[@JamesB-kz2vk]

At this rate it really will take till year 40k

[@sameverett5099]

The emperor protects

[@Hankbob_Hillpants]

It’s canonically the correct gauge too

[@pirobot668beta]

Need faster fuel. Time of flight is under 1/4 second, so rocket-motor should be burned out before then, no? Ammonium perchlorate + 2-part silicone rubber = 'pencil eraser' fuel grains. By adding trace amounts of powdered red rust, you can modify the burn-rate. Cast a hollow-core fuel grain directly into the printed slug, allow it to cure in place. Prime the hollow-core with black-powder, load yer shells, Robert is your parents sibling.

[@RushBuzzing]

Lol. Bobzyerunkl

[@weirdscience8341]

I've been playing with yoyos cool stuff u got any good tips because I think my last attempt was wrong as under thrust it became very unstable I think my center of pressure equations were off

[@UGSETH2]

Is that a twist on "Bob's your uncle" ?

[@graegoles8382]

I know im late to the party, but is this something you yourself could do if you were sent some 3D-printed slugs? cant really send explosives overseas here from Holland. Are you in the States by any chance? because i wouldn't mind doing the 3D part if you could do the pyrotechnical aspect. regards, maurits

[@aeredhaelredfalen6194]

Robert's the fellow who buggers your Auntie!

[@EdwinSarkissian]

You guys had sooo many chances to pick up all those hot bullets 🔥

[@taofledermaus]

lol there's only one professional hot bullet picker upper.

[@EdwinSarkissian]

TAOFLEDERMAUS Hahahaha

[@CaolanSuibhne]

"Professional"

[@jsrocker1776]

Lmao!!! 😂😂😂

[@lumbearjack3722]

Hahaha Edwin 😂👆🏻

[@wingnutzster]

You’re firing PLA printed rounds with no control on tolerances, packed with candy rocket fuel, made by a stranger with no liability ... and you’re worried about some flames in a nearby bush! Love it!

[@SurvivalRussia]

I like that hard drive centrifuge :) I hope you revisit this theme.

[@taofledermaus]

Haha, nothing but the highest-tech equipment!

[@SurvivalRussia]

This is going to be an awesome video :)

[@WalkerKlondyke]

Howbout jamming a 9mm case without primer in the back end to make a nozzle.

[@matthewbrugger4022]

the is exactly what i was thinking

[@Psiberzerker]

You'd have to use the primer hole to form a Venturi, but it could be done. A primer pocket wouldn't make a very good venturi on it's own. There's a reason why Rocket Science is right up there with Brain Surgery on the sliding scale of precision. They both either go perfectly right, or horribly wrong.

[@Anoyus]

And possibly turn the round out of aluminum?

[@bonielsen8001]

Well just compressing the exaust will massively increase the effect of that kind of fuel, at the cost of burntime, but as is they would have to go like 500 yards to burn out. The fueltype used basically burn faster by the pressure its in, in open air its mostely just smokepowder. Fully enclosed it can rupture steel tubing, if the nozzle is too narrow. Obviusly as mentioned in the replies an actual nozzle would help it both stabilise and create more thrust, but theres length to consider and safety if you get in to regions of pressure vs propelleant charge that could set off all the fuel before the rocket leaves the barrel. Jamming in a 9mm casing would give you an indication of the burnrate on the fuel vs curent rate. Still leaves room for improvement, but its fairly easily done so why not give it a go.

[@Psiberzerker]

Right, you could do that (Just jam a casing in there) but it would need some work to make it an actual stable rocket. Just coning out the primer pocket with sculpy clay would help a lot. Also, a forcing cone on the inside... The more work you put into it, the more likely you'l actually get something approaching performance, but if it doesn't light, it ain't a rocket. It's a hollow plastic shell, with a brass lining.

[@erickruiz9960]

With this info someone should make a modern giro jet made out of metal with a solid exaust chamber. Like a real rocket :3 It shall be called the rocket slug.

[@miguelgameiro8063]

Check backyard ballistics

[@mobrien7211]

Taoflederslugs... More accurate than a gyrojet!!!!!!!! On sale now only 49.99 each.

[@JasonW.]

M O'Brien Magnum Research would sell them for $250

[@rowangallagher4579]

I mean that's cheaper than gyroget

[@boid9761]

Works 80% of the time either. I want something more accurate and more consistent than Gyrojets.

[@mono_si]

Gyrojet 2, ballistic boogaloo.

[@playswithknives]

Brought to you by square space viking war of audible books.

[@taofledermaus]

Haha, mattress in a box, dinner ingredients in a box, etc.

[@DarthCiliatus]

TAOFLEDERMAUS box in a box

[@ballsmahoney6084]

4:30 That body of water is actually the Pacific ocean, and is several hundred thousand miles away. There was no danger of him shooting the ocean

[@kadmow]

Can't be that far as it would nearly be at the eyelevel vanishing point... Even something as big as the pacific ocean vanishes when a long way away (just as it rises to eyelevel - never above, unless concavity exists) jk.

[@EndingTimes0]

So the land behind the water is Japan then?

[@apolloaero]

@@EndingTimes0 Obviously not. He said hundres of thousands of miles, so they're clearly not on Earth. I wonder what land and what ppl live there

[@karlwschipul5079]

The radius of Earth is only some 12,000 miles long - from the north pole to the south pole.

[@karlwschipul5079]

hundreds of thousands of miles would be like the distance of the moon

[@TheNetsrac]

Great job with those prototype slugs. Needs some work, but interesting idea. Not sure how safe I would feel, sitting behind the trigger though. Then again, considering what @Officer Gregg has been through recently, I guess this is rather dull. Gregg. Once again, I'm so glad that you and your family are safely back home

[@taofledermaus]

Haha, yeah, I've gone through a few tables. We've busted up the plant stand several times and Danny keeps straightening it out and re-welding it. We use that stand to try to keep the slugs from hitting the table. lol

[@justiceforsethrichwwg1wga160]

TAOFLEDERMAUS Genius!

[@corwinhyatt519]

Joseph Scharfenberg The type of propellant might have to be changed to get the boost in impulse. It also might need a change in material to a more durable variety to compensate for the more sudden shift in velocity.

[@dominiccacace1834]

I'm working on a second version now and I plan on using a nozzle, larger core burn and add iron oxide to the fuel all to make the thrust higher and shorter. I also plan on adding more ballast to the front and strengthening the week point at the neck.

[@corwinhyatt519]

Dominic Cacace Looking forwards to seeing how the new design turns out. :)

[@LaughingMan44]

We're getting closer to space marines, praise the god emperor

[@benvaun1330]

perpendurcular 720 and we are changing the name of our armed forces to fall in line with space force. The navy will now be water force, the army land force, air force will remain unchanged, marines will be punch force, and the coast guard will be swim force.

[@benvaun1330]

perpendurcular 720 touche I stand corrected.

[@vladimirpootis9690]

The Emperor protects

[@airthefallen]

Had a good feeling that I'd see a fellow 40K fan here. Well met! I can't wait to see if anyone else has their own gyrojet designs to share with Jeff. Here's hoping one works as intended.

[@LaughingMan44]

All we need is someone willing to make 40mm gyrojet rockets

[@JesseAndMike]

Awesome video as always Jeff! :D Liked!

[@taofledermaus]

thank you Jesse and Mike (don't get any ideas of shooting each other with rockets!)

[@huaahhggg9507]

Did you even watch this video? Nothing worked. They tumbled, produced no thrust, and was a complete waste of time to watch.

[@chpenney26]

@@huaahhggg9507 unsuccessful tests can yield as much if not more useful data than successful ones. It's called learning from your mistakes (like the one in your profile pic)

[@bobbywhite6365]

Don't let OG near that pond he might go snorkeling lol

[@OGsDangerShow]

🤣✌️

[@harrykelly4651]

He'll end up in Baja

[@primberrysoup8770]

@@OGsDangerShow to soon? 😂😂😂

[@thunderlord2200]

to late for that !

[@weirdscience8341]

I just watched his account of that I'd be worried because of that film midnight express but all the Turkish people I know are ok

[@hughaskew6550]

An interesting first effort on rocket slugs. The propellant needs to be much more active and faster burning -- the slug is almost at the target before any propulsion even begins.

[@captain0080]

Bear got hit on both heads.

[@mandernachluca3774]

The only thing cooler than a gyrojet shotgun is a gyrojet artillery piece ..... *looks at the Sturmtiger*

[@1973Washu]

the K5 railway gun had rocket assisted shells

[@Bugsey35]

We have those it's called RAP.

[@cdawson198600]

1973Washu wow I didn’t know those were rocket assisted.

[@alexmartin9177]

himars

[@eisenerballer]

cdawson198600 there was a version that was rocket propelled. Could only fit 14 kilograms of high explosive in them though. Most rounds fired were traditional high explosive rounds.

[@DaveTex2375]

That poor bear. Got neutered and peppered with pellets.

[@eric1138]

Love the Space:1999 theme music.

[@carbon1255]

Thunderbirds.

[@crazynfc2667]

@@carbon1255 exactly

[@GunSam]

It's just my job five days a week A rocket man, a rocket man And I think it's gonna be a long long time

[@nathangilbert7774]

Haha when you gonna shoot some of those C and D type model rocket propellant cartridges

[@rdstngry]

I think the C and D engines are too large, note, Its been 18 years or so since I held one. I think the A or Maybe B size might fit inside the diabolo shape slug quite nicely. Estes A10-3T 2.9 lbs of thrust for 0.8 seconds, and I believe they are 13mm in diameter.

[@nathangilbert7774]

Matt John true

[@Dgardei]

I've actually done that twice with Estes C6 motors years ago. I put in a little BP to get it going. one flew perfectly. The other exploded,

[@evknucklehead]

Model rocket motor letter designations don't directly refer to the physical size of the engine. For example, an Estes C6 rocket engine is the same physical size as most of their A and B Engines (and even some of their 1/2A Engines), but the C11 series is the same size as their D engines. Their larger E-class engines can also either be the same diameter as the D's but longer, or the same overall size as their F class engines. Other manufacturers may also have different physical sizes even in the same letter class, and engines of Class H and up require various permits or licenses to use. S is the current highest recognized class designation, which is also used in some smaller commercial rockets.

[@travhammer]

I'd love to see how my favorite round, Remington's 7/8 oz Sluggers @1850fps flies in high-speed footage. Have u guys ever tested this round? I didn't see any vids in archives on the Slugger rounds. Great vid BTW.

[@TheOlsonOutfit]

Must... Resist... Urge to... cause trouble with some model rocket engines.

[@taofledermaus]

When I was a kid, my brother and I lit off an Estes engine by itself and it cork-screwed all over the place and landed in a bush next to our house and caught it on fire. lol

[@Allan_aka_RocKITEman]

@@taofledermaus >>> *I'M TELLING NAR!!!* 😁

[@SuperKaamio]

Gotta love that you also put measurements in metric units now! Thanks! Love your videos :)

[@SuperAWaC]

you're gonna need faster burning propellant than that, although i wonder what effect the exhaust filling the low pressure behind the projectile has. i think the ballistics of an actual rocket need to be different from a ballistic projectile, since ballistic projectiles rely on as smooth as an airflow around them as possible to stay accurate, and rockets don't care about turbulent airflow behind them since they are dominated by the thrust

[@honeybadgeractual5734]

I feel like this needs to be revisited to a degree with perhaps a rocket powered sabot that uses fin stabilization, you'd need a single shot to use it, so that the extra extra long shell can fit (thinking a 5 or 6" long cartridge) However the pressure and recoil shouldn't be super bad,especially with a ported barrel.

[@Thane36425]

That looked like the base bleed concept for artillery. Those shells had a small amount of material in a section of the bottom of the shell. The intent was not to provide thrust but to break up the drag immediately behind the shell and give it a little more range. Unfortunately this shotgun round was so unstable that even that effect didn't have a chance to work properly.

[@joedarkness808]

Space 1999 music .. nice

[@bobdefalco]

TERRIFIC STUFF

[@Panzercommander121]

The main video music is Thunderbirds..

[@nmccw3245]

Gerry Anderson montage

[@Allan_aka_RocKITEman]

@Joe... >>> *AGREED!*

[@BigDaddyBouncer100]

I hear thunderbird music!!!

[@yusataslim3666]

Just need faster rocket fuel, and maybe a rifle barrel, so the slug fly more stable

[@engineersfreetime4036]

You guys should try printing them horizontally. That will give the print increased strength over a vertical print :)

[@Dave2108]

Love the music.. Barry Gray " Space 1999 them tune " And the Thunderbirds tv theme

[@KD0LRG]

That poor bear took one in right in the marble sack!

[@ca6360]

Stop any home invaders with "2 shotgun blasts off the back porch" .... not with a pistol grip you dont 😱😱😱 lol 🤣🤣🤣 too scary! These could act as flares to your neighbors or the police, or the fire dept when you catch the woods or neighborhood on fire.

[@ArtisanTony]

Good to see OG back safe and sound :)

[@OGsDangerShow]

Thanks Tony!

[@sparkplug1018]

Great video, maybe see if the Ballistic Machinist can make some of these from aluminum for you. Could machine them a bit nose heavy too.

[@DickHolman]

^+1

[@ravissary79]

sparkplug1018 heck maybe an extra long Breneke, hollowed out from the back a certain size, then have the machinist make a thin steel sleeve you could put a small potent rocket motor in, make sure the sleeve is threaded, abd have them machine a matching screw on back cap which tapers in a finned hour glass shape where the bottom half acts as a thrust focusing nozzle. The forward lead nose, twisted ribbed external shape and steel fins will help with stability, the steel liner will manage heat and contain the reaction, the nozzle will direct the force so it's more focused and potent. So it's not locked out before ignition, it should be put in an empty high brass shell with no wad or buffer since it won't accelerate fast enough to need it, and this way the primer alone should ignite it as the weight of around 400 grains resists the force of the primer so it has a chance to burn. Maybe include a strand of cannon fuse or 2 to insure the primer ignites the rocket, just in case, it will be blasted out and won't matter if it's not needed. I hope someone does this.

[@evknucklehead]

"an empty high brass *she will* "? Autocorrect get you or just a slip when typing?

[@ravissary79]

@@evknucklehead it's my phone. It's the worst.

[@nathangilbert7774]

The space force will thank you later

[@zippythinginvention]

I wish you'd revisit this one.

[@armin0815]

Cool stuff!

[@travhammer]

And many claim the scattergun has no versatility. I've always found it to be full of facets.

[@denverbowen4430]

Love your channel. Your audience is the 12 year old in every grown man (we all did crazy experiments as kids) but with the safety element. Keep it up.

[@taofledermaus]

thanks

[@thatguybrody4819]

Surprisingly accurate, but needs to be made out of a stronger material like brass or copper. Interesting thing that, but i'd still go with the glass rounds or the vacuum core shots.

[@Felenari]

Thunderbirds soundtrack ftw...

[@tadlockje]

was actually Space 1999. I had to check the comments to see if I was the only one who caught that. Then again, I may be the only fan of the show that remembers the music and watches this channel.

[@tadlockje]

Easy mistake to make, though. Both were composed by Barry Gray.

[@Felenari]

@@tadlockje I didn't have that one as a kid. I grew up in Belgium. Thunderbirds and A team reruns for me.

[@awmperry]

It’s definitely the Thunderbirds theme. Did Space 1999 use the same melody with a different arrangement or something?

[@awmperry]

Just looked up the S1999 theme - very different, with a distinctive funk sound. EDIT: You’re actually both right. The S1999 heme appears at the start of this video, but the rest of it is the Thunderbirds theme.

[@TheMicroTrak]

A very innacurate incendiary/Tracer round for a shotgun. Remember: Only you can prevent forests!

[@SuperShiki666]

Its now just time until we get a real life bolter

[@Oberkaptain]

Probably wouild work better with just solid filler and a purpose built nozzle either printed or machined out of like aluminum, maybe put a steel or tungsten nose on it for weight and penetration.

[@Dsdcain]

I agree the bear shot was pretty cool. Those worked pretty well for a first attempt at these things. *OG* I hope you made Jeff clean your shotgun after those black powder shells. Thanks for the video guys. *:)*

[@OGsDangerShow]

Yar! Just remembered I need to go clean it! Thanks for the reminder!

[@andybreglia9431]

Let me guess. Next is putting this stuff in the base of a Foster slug. You're going to need propellant with more hair on it for this to work.

[@3000gtwelder]

Space 1999 Hell yeah!!!

[@aleciacarpenter7856]

What's wrong with binge watching the Andy Griffith Show? Huh OG? It's still one of the best!

[@delta7743]

the thunderbirds soundtrack made my day XD

[@mmnnra55]

I think you should do more with this type of round... I think you guys could do better. 🤔😋👌

[@flarex10]

i'm just in shock they beat gyrojet rounds with something cheaper and lower power.

[@MrCh0o]

I think that might be mostly due to the higher initial speed

[@abhijeetsutar5259]

How about having these made out of steel/aluminium on a lathe? You can use a restrictor plate without disturbing the balance too much.

[@JenniferinIllinois]

"It's kinda like rocket science" - I see what you did there! Hehehe...

[@mashurface]

...don't the new Heavy Hitters have a cavity in the rear? Maybe fuel some of them up and see what happens...

[@joshuasama2233]

“My wife’s gonna be so mad...” We felt that.

[@uiomancannot7931]

They're like mini little flares. And once you're done shooting them they're completely smoked and ready to eat.

[@NvrchFotia]

If anything the rocket fuel is adding velocity in the barrel and outside it.

[@canisroot8727]

You keep showing up in the comments of the videos I've watched as of late. I find it quite humorous.

[@NvrchFotia]

canis Root read siege 2

[@Robert-qm7yi]

Maybe more thrust, quicker burning fuel and a metal body might make these really cool

[@ryandaley1402]

I hope more people send in "rocket rounds" it seems like a a whole new interesting type of round we could see more of on the channel. I think the Taofleder-team could come up with some really innovative rocket rounds that preform exactly like you would think they should: stable flight, accurate, keeps accelerating?, increase range, all sorts of things

[@wilsoncalhoun]

Holy crap. We're living in the future, boys.

[@robertfish4052]

That was a kentucky demo ranch job. Let the author choose if that's a good or bad thing.

[@RangerOfTheOrder]

I think the slug needs to be heavier. It would build more pressure in the barrel an give the propellent more time to get going.

[@raymondpjoyce]

wonder if a heavier body like a cast lead body would help stability jeff og and danny are the experts tho

[@user-qf6yt3id3w]

Good to know we can make bolters now. Especially as the numbers of xenos and heretics seems to be on the increase.

[@TacShooter]

Video length reported as 13:37 on thumbnail. That's '1337! 'LEET!

[@lintonross9135]

Is it just me or did the background music sound like the Thunderbirds song.?

[@hadesdogs4366]

If you want you could add a primer on the back and extend the round turning it into a ceaseless round

[@muskrathonmml3070]

We need a collab between TAOFLEDERMAUS and Matt from Desecrati-, I mean Demolition Ranch! That would be a KZbin dream come true!

[@SvenSchumacher]

The fuel burns way too slow... So it doesn't help. But a nice idea

[@dennisnieradka6668]

Wtg interesting, surprised your using Thunderbirds theames

[@mikejones9080]

Only you guys would test stuff like this. That's what keeps us interested. There are countless channels out there showing various mass produced ammo through hundreds of firearms, but only Tao Fledermaus tests the weird and wacky. Love you guys. Also, no one else has Breanna and her sister.

[@taofledermaus]

Thank you Mike!

[@dazaspc]

Thumbs up for the thunderbirds montage soundtrack.

[@scrumpyhunter8561]

Love the Thunderbirds soundtrack as well guys - keep up the good work

[@MichaelMacGyver]

Couldn't you use model rocket motors inside a milled/lathed diabolo slug

[@alistairsamson299]

I hope you find a real rocket wallah, who can load you up some proper rocket fuel.

[@tokewarming]

If the fuel was more violent in its burning state. Or a longer barrel!

[@Tomcat71]

"Homemade rocket fuel " sounds like a way to get a visit from the ATF. lol

[@turdledive927]

I made a spark plug slug. I havent shot it yet but it might be funny to see one shoot in high speed

[@frankalvarez7387]

I think you need much faster propellant and maybe even less of it

[@thomasbabilon8992]

Can someone please machine these in aluminium and with a restrictor nozzle?

[@patman0250]

This is technically just a tracer with absolutely no thrust.

[@chenyanxiang]

it scared all the shit out of me ,wait ,where is the toilet roll,you destroyed them all?

[@trijigon]

The gyro jets were no inaccurate, the shooter was just really bad. Watch the slow mo and see the ridiculous flinch from anticipation. It seems worse cause there’s a delay like early muskets and his flailing pushes the barrel around.

[@BEder-it4lf]

Put 9mm in slug. Find a way to detonate the primer?

[@張海鷗-t2t]

執政網站內容舉發回覆提交使用者頻道使用權播放。這部影片影響到資產權益受損嚴重。必須執行廢除提交舉發回覆國際性頻道國家執政重懲罰款處分永停職務服務。

[@Rekaert]

Space 1999 theme makes this video surreal.

[@TacShooter]

Hahaha, the Space: 1999 Season 1 Opening Theme! Awesome!

[@marzcapone9939]

So, it will cauterize the wound of the perp....

[@matthewXL]

That rocket gun blows my mind man

[@Ironclad17]

This has no right to work as well as it did. You need to try with the chronograph!

[@blackriflex39]

Can a machinist out there make a slug mold for this design out of aluminum?

[@mr.lassard23]

Hello Jeff why don't you try making tracer slugs based on this design

[@taofledermaus]

Yeah, that would be easy, I would think!

[@j.fraley6862]

BRAVO!!! Standing ovation for the Bear. Nut shot and head shot, but the tumble over, and hitting the wall and then falling performance was Flawless.

[@shark180]

Do a nuclear powered slug in the next video!

[@VarkaTheDragon]

Damn - you hit those orange squares *dead on*!

[@hoseja]

The rocket candy burns a bit too slow :(