JSPB Tengu Muzzle and Grilled Darts Tested!

In this video I take a look at two Tengu Muzzles from JSPB, a new design which uses the air blast to put spin on the darts. Additionally, I test "Grilled Darts" which have rifling burned into the foam.
Tengu Muzzle: www.jspb3d.com...
Grilled dart maker: www.jspb3d.com..."GRILLED_DART_MAKER".html
JSPB on Facebook: / jspbcombat
JSPB on Instagram: / 3dbbq
Jangular's video on the JSPB Pro 2 which introduced me to Nerf: • Best Nerf Blaster Of 2...

[@BradleyPhillipsYT]

Tengu Muzzle: www.jspb3d.com/store/p216/JSPB_TENGU_MUZZEL-Air_wrap_TECH.html Grilled dart maker: www.jspb3d.com/store/p207/JSPB_3DBBQ_"GRILLED_DART_MAKER".html JSPB on Facebook: facebook.com/jspbcombat JSPB on Instagram: instagram.com/3dbbq/ Jangular's video on the JSPB Pro 2 which introduced me to Nerf: kzbin.info/www/bejne/fZC5fYGnortjrdU

[@mainstay.]

I'm so glad you gave credit to the originator of the 'SCAR' concept. I'm sure it will be an education to most.

[@ADOPTMEDROO]

Are Sabre apexs edible?

[@ima_bread]

ever since 3d printing came out, the nerf hobby evolved rapidly with 3d printed designs being adapted into real, mass-produced balster. Like how the caliburn inspired many higher fps blasters!

[@emanuelemanuel7038]

Love the dual range cam! The sound of the darts whizzing by and the sound of your target are all so satisfying! Keep it up!

[@mhebert350]

thats funny, I was just thinking yesterday if carving angled fins on darts could help stabilize even more. Very interesting to see where this is going

[@jemeljordan-butler4510]

I wonder how this compares to the “ACORN” by Beneto that is coming out…

[@Castdeath]

I think it came out

[@zachkostechka3673]

Printing one right now, I'm excited to take it for a spin

[@justusdude]

Acorn don't werk

[@frozenfade]

I wonder if anyone has printed an acorn with resin yet.

[@BradleyPhillipsYT]

I haven't tried an Acorn but the fact the description says it originally had too much spin, now I'm intrigued. Has anyone tried it with success on a springer?

[@triax7218]

You can see the darts that go wide are eventually stabilising and rotating back onto you're aim point. This is almost exactly as how a bullet behaves in the air from spin and velocity, the only difference being bullets wave up and down rather than sideways. Indication here is that this is the perfect distance for this particular ammo where the aim-point and hit-point overlap.

[@paulnew3310]

i made these with a dremel with cutting disc and engraving bit. Then used a hot razor to burn the grill marks . I had no way to test accuracy but i got decent with the hot razor Something any dart making company could perfect id imagine

[@BradleyPhillipsYT]

Sounds like a much more reliable way to make them than a torch

[@paulnew3310]

It's harder than you would think., i had the best luck going over a sharpie mark. but still wasn't very consistent at all.

[@TS-LordPhrozen]

So we have the DIY bamboo maker.... What if we had a printed mold to put the darts in and hit with a hairdryer like the bamboo ones?

[@BradleyPhillipsYT]

That could potentially work

[@mhebert350]

unfortunately the DIY kit is not very consistent

[@Axemanagement1]

I made a similar form out of 13mm aluminum barrel material and I heat the slits with a heat gun. With my long shot and no scar I got accuracy equal to bamboo darts through a Bacar. This was inside my house at around 12 meters. Will test more when Indiana weather cooperates

[@RiverWilliamson]

Please note that your club may or may not allow grilled darts. MNH throws grilled darts in the trash when they collect them

[@veryrealperson3694]

it has promise, but fdm printing seems too rough for an application like this. I wanna see one of these made in SLA.

[@mhebert350]

exactly my thoughts too

[@prettysoIdier]

What! I wanna watch it now, I’m sitting down in the throne room.

[@asliceofnerfpizza8549]

Oh hey, das me on the bottom row at 1:29

[@blakbuzzrd]

Theoretically, the problem with grilled darts is this: the air behind the dart from the plunger tube tries to make the dart spin in one direction in the barrel, but once it leaves the barrel, the same grill marks on the dart are being acted on from the *opposite* direction as the dart flies. In other words, the dart comes out of the barrel spinning in one direction, and then is driven to spin in the opposite direction while in flight. I'm guessing (and only guessing) the visible instability and whirlybirding of the grilled darts in flight has something to do with that. Does anyone have an answer for that yet? Happy to be wrong, because it's a neat concept.

[@BradleyPhillipsYT]

Perhaps putting the grills at the front of the dart instead of the back? But you still need to solve the consistency issue

[@dmrroag4590]

I feel like the darts wouldn’t necessarily spin the opposite way inside the barrel because although the air behind the dart would be trying to spin it the opposite way, the drag with the air in front of the dart would be trying to spin it the right way. So maybe it would just cancel out and not spin while it is in the barrel?

[@blakbuzzrd]

@@dmrroag4590 We are way above my pay grade in fluid mechanics here, but since the pressure behind the dart is much greater (that's how we're getting the thing to fly, after all), I'd bet it does try to spin in the barrel. DOES ANYBODY AROUND HERE HAVE A DEGREE IN PHYSICS?

[@blakbuzzrd]

@@BradleyPhillipsYT That's an interesting idea for sure.

[@dmrroag4590]

@@blakbuzzrdYeah and I guess since the cuts are in the back most of the interaction would be in the back anyway. Seems like putting the cuts in the front would definitely be an improvement, as long as that doesn’t make it unstable in flight

[@Isaac_L..]

Im not surprised by the groove cutting concept as it has been proven extremely effective in paintball with First Strike rounds. I'm really interested in a paintball version of the tengu muzzle device as an alternative to rifling for first strikes. I've never heard of it the idea of curving the air flow before, seems really smart. Might need to spend an afternoon with the 3D printer...

[@BradleyPhillipsYT]

Paintball has actual rifled barrels to use with first strike though, I'm not sure how it would help round ball

[@Isaac_L..]

​@@BradleyPhillipsYT Yep. Round ball accuracy is almost always worse in rifled barrels compared to (quality) smooth bore. For roundball the more frictionless the barrel the better. The physics of spinning change drastically with a round projectile vs something cylindrical. There's a reason you don't use footballs in rugby (or soccer balls in football for Americans like myself).

[@spyrdian]

Could you put out instructions on how to perform the buffer tube swap/making the spring rest?

[@aguy3896]

You're probably better off not trying to rifle darts at all. Its more important to aerodynamic stability that they be perfectly symmetrical. The lightweight foam and rubber tip is acting like a fin stabilized projectile and spinning will actually cause worse accuracy and more drag. A heavy cylindrical projectile like a bullet needs to be spin stabilized, but it cannot have fins. That's why they make boat-tail bullets - to help with drag and aerodynamics of spin stabilization. Look at how modern tank ammunition achieves accuracy with smoothbore guns.

[@Axemanagement1]

Excellent point.

[@FoamFlinger0523]

Looks like this"air scar"only works within 20 meters,still have to depends on scar barrel,bcar barrel,pcar barrel or just fire the bamboo dart with no rifling beyong 20m.

[@jemeljordan-butler4510]

This thumbnail just made me buy each of these… Here’s hoping Bradley has good things to say about them. 🤞🏾 Edit: Perhaps, I should have waited to watch the video first… 😒LoL

[@BradleyPhillipsYT]

F

[@frozenfade]

Ok now i want to see the sabre vs a M0053-1 in an accuracy test. Both have massive bcars on them haha.

[@BradleyPhillipsYT]

I'm getting one of those mega blasters from Moose soon

[@frozenfade]

@@BradleyPhillipsYT I have printed all the parts for a M0053 and my hardware arrives on December 1st. I am so excited! I hope to get the sabre apex prime sometime in the spring if I can swing it, it's very expensive haha.

[@MisplacedMoose]

Yeah, I need to get some good external verification that I'm not delusional about the accuracy benefits.

[@frozenfade]

@@MisplacedMoose I don't have the mega accufakes yet, nfstrike is a bit slow. But having finished my M0053-1 this weekend it's pretty freaking accurate with regular half mega. The only hard part about dialing in my optic was how fast they go it can be hard to see where they hit haha.

[@thepunisher3597]

What you need is a device that holds the center stiff and press heat the grooves into the body of the dart.

[@BradleyPhillipsYT]

If you had a negative of the grooves which you could heat up and slide over the foam like how Worker bamboos are made but more aggressive might work

[@dmrroag4590]

What if you printed a mold to compress the foam instead of burn it? Might be more consistent

[@BradleyPhillipsYT]

Requires heat to take a set, or it'll go back to normal again.

[@90sduelist83]

worker sees video..... drops darts 2 hours later with tutorial and 2 day shipping lol

[@BradleyPhillipsYT]

Hopefully haha

[@MisplacedMoose]

I feel like the grilled dart concept would work better on full length darts where it's more drag stabilized in general. That being said.... eh

[@FortycadeConcept]

this looks promising.

[@josedelarosa1042]

They should try inserting small blades into that. That way they can control the angle and length of the rifling better. Maybe a pusher mechanism that pushes the dart. Seems a lot safer to me.

[@BradleyPhillipsYT]

That's what I was thinking, having a way to cut the foam consistently rather than burning it

[@williamhedges7441]

Try boiling water. Worker makes a similar mold to do your own bambo darts, if you follow the instructions for those I bet these darts will come out good.

[@BradleyPhillipsYT]

You'd need a different kind of mold to use boiling water, though I'm pretty sure Bamboos are baked in the oven or something

[@scottblack2760]

Serious curvage

[@randomblueberry5019]

Intriguing

[@Ivanpotatoman]

Interesting

[@LL-wc4wn]

I mean the short answer is these dont work. You were being polite. Good tests.

[@BradleyPhillipsYT]

The short answer sure, but the long answer is that the Tengu is situational and the darts could actually work

[@LL-wc4wn]

@@BradleyPhillipsYT yeh with a lot of maybes it might work.. different sized barrel and hpa or something. But in general for 99% of blasters they dont increase accuracy

[@paulnew3310]

doesnt look good so far though