An happy new year to all the forum members .. with my new artillery :)

[MinamotoKobayashi]

Hello forum!

I have worked hard lately for my 25 kg of pure pyrotecnic juice

Take a look here:

Cakes apart, all the rockets and the shells are completely designed and build by me myself

There are many interesting news, suck as "capless" rocket, "nozzleless supersonic rocket" and "little brother" rocket.

Kim Jong-un, you're nobody !!

I have so much material to post and surely next year will be a great year for reviews!

Many many wishes for a good new year, dear forum!

Richard.

Edited January 1, 2018 by MinamotoKobayashi

[clarkie752]

Nice looking work. Hopefully there is video to go with the pictures.

Adam

[PeteyPyro]

MK, your build quality seems really great, and I see tremendous attention to detail and consistency in your offerings. I'm looking forward to your videos of these meticulously crafted fireworks. Thank you for sharing.

[MinamotoKobayashi]

https://www.youtube.com/watch?v=c0P8B0rqa6U&feature=youtu.be

 

This was one of the two nozzleless supersonic rockets with 5" shell attached on the top. 1500 grams splashed in the air like a feather.

Unluckly the phone was not able to fully capture the power of the loud bang and the luminosity of the effect.

In my modest opinion I must lower a little bit the altitude to enjoy better the effect. Or attach a 6" shell

[calebkessinger]

Nice!

[kleberrios]

https://www.youtube.com/watch?v=c0P8B0rqa6U&feature=youtu.be

 

This was one of the two nozzleless supersonic rockets with 5" shell attached on the top. 1500 grams splashed in the air like a feather.

Unluckly the phone was not able to fully capture the power of the loud bang and the luminosity of the effect.

In my modest opinion I must lower a little bit the altitude to enjoy better the effect. Or attach a 6" shell

Very beautifull fire fly, almost one minut down . What is the mesh of flake Aluminium ?

[MinamotoKobayashi]

Hi.

The mesh of the stars was from Shimizu fast (courtesy of NeighborJ):

 

Potassium nitrate ............................................ 31,8%

Charcoal airfloat (hardwood or SYPine) ......... 35,7%

Charcoal 36 mesh (hardwood or SYPine) ...... 7,9%

Sulphur ........................................................... 7,2%

Dextrin ............................................................ 5,6%

Ferro-titanium medium mesh .......................... 4,4%

Ferro-titanium fine mesh ................................. 4,4%

Titanium medium mesh sponge or spherical .. 3,0%

The propellant of the nozzleless rocket was:

65% KNO3

35% Sucrose

For every 100 grams of this mix, I added:

1 gr. Red Iron Oxyde

1 gr. Titanium sponge 450-1000

Since I was not able to find the SYpine, I bought high quality lumpwood charcoal and broken the big

pieces with a pestle.

Then I separated three kinds of meshes with 8mesh and 20mesh sieves.

[MinamotoKobayashi]

This was a launch of the same 750 grams supersonic nozzleless rocket only . . very impressive !!!

 

https://youtu.be/qteZzgFY4jo

Edited January 3, 2018 by MinamotoKobayashi

[ExplosiveCoek]

Do you have any idea why it spiraled so much during lift-off?

[calebkessinger]

IT was trying to pull the sticks off probably.. That happens sometimes

Nice ROCKET!

[MinamotoKobayashi]

Oh Yes .. I have drilled the hole not perfectly centered and not perfectly parallel to the host. Very difficult to make by hand a straight hole in a so long tube without any guide.

I'm building a special tool to make the hole perfectly centered and parallel: it is an aluminum tube with an hole

where will be inserted the cardboard tube with a perfect fit. The aluminum tube will have the same lenght of the cardboard one.

On the top there will be a rock solid part of aluminum (about 5 cm of full aluminum) with a 12mm hole in the center, that works

like a perfect guide for the drill bit.

This tube will have another important purpose: it will allow me to use my 10 tons hydraulic press to pack better the compound inside without

the risk to break the cardboard tube walls.

I have already done this toll for my small rockets with bentonite nozzle and it works very well!

I will do a full tutorial asap ...

Edited January 6, 2018 by MinamotoKobayashi

[hesusplease]

Haha omg, that looks amazing!!! Asuming it's homemade?

[MinamotoKobayashi]

Yeah, fully homemading.

But this is only the beginning, I want more