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New launch of beautiful r-candy rockets with 6 inch shells.


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#1 MinamotoKobayashi

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Posted 10 May 2019 - 09:28 PM

New artillery ready to be launched:

32878460707_7233d458ee_h.jpg

 

Here are some videos:

 

6 Inch Shell Double Petalled Turquoise Plus Kamuro Plus Strobe:
 
6 Inch Shell Golden Glitters With Blue Stars:
 
6 Inch Shell Green Fade Red Plus Strobe:
 
6 Inch Shell Green Fade Red Plus Strobe:
 
6 Inch Shell Kamuro With Strobe:
 
.. and as a bonus, a scary 5" shell CATO:
 

Edited by MinamotoKobayashi, 11 May 2019 - 12:32 AM.

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#2 Merlin

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Posted 11 May 2019 - 01:03 AM

Truly magnificent! Didnt know RCandy could be powerful enough to carry such large shells. You should be proud.
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#3 JOPETES

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Posted 11 May 2019 - 08:14 AM

Bonitas carcasas en especial glitter a azul, buena simetría.


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#4 Blackmach

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Posted 11 May 2019 - 01:34 PM

good job, I see that your rockets do not reach enough height and the explosions reach the ground.

#5 Sulphurstan

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Posted 12 May 2019 - 03:06 PM

Buongiorno Minamoto.
Amazing building, Amazing tails, Amazing Breaks!

Regarding the Cato, did you figure out what the cause was? The shell also went off, right?

#6 MinamotoKobayashi

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Posted 12 May 2019 - 04:34 PM

Hello.

Thanks to all the users for the kindly words.

 

Yes, the CATO happens because I did an hole in the compound too small (or too deep), so the internal pressure reached was enough to uncork the cap

with a consequent premature shell ignition  :P .

While for the 6" shells I used a conservative setting rockets, for the 5" shell I used a propellant setting pushed to the very limit.

Now I try to boost a little bit the rockets for the 6" shells (I add 1 cm extra of propellant, or increase the packing pressure from 7000 PSI to 8000 PSI, to increase the

altitude ignition), while I will shorten the rockets for the 5" shells for about 1 cm.

 

Ciao Sulphurstan  :D


Edited by MinamotoKobayashi, 12 May 2019 - 05:48 PM.


#7 Zmuro

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Posted 12 May 2019 - 11:25 PM

Very nice symmetrical breaks, beautiful tails. Did you use aluminum tubes for all motors, event for two shorter ones with 4" shell?



#8 MinamotoKobayashi

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Posted 13 May 2019 - 12:08 AM

Hi Zmuro.

Nope, for the 4" and 5" shells I use traditional waxed parallel wound cardboard tubes bought from Pyrogarage because I do not need excessive rocket lenght.



#9 Arthur

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Posted 14 May 2019 - 12:39 AM

Is there some reason why you use a rocket where a lift charge would make an easy shell with no falling debris, and no falling stick to find later?

 

The shells are glorious, nicely designed and well built 



#10 MinamotoKobayashi

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Posted 14 May 2019 - 08:45 AM

Yes, I love the rockets, the departure sound and the tail. Much more scenic :)

Besides this, my shells do not have always the same exact diameter, so there could be big issues with mortar ..



#11 Gerben

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Posted 14 May 2019 - 09:06 AM

Very good looking shells! What was the formula for the kamuro you used?


"Dosis sola facit venenum" ~ Paracelsus

 


#12 Sulphurstan

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Posted 14 May 2019 - 02:27 PM

Very good looking shells! What was the formula for the kamuro you used?

Yes, this kamuro is great, my first and only kamuro stars were disastrous (probably the charcoal.....)

#13 MinamotoKobayashi

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Posted 15 May 2019 - 09:27 AM

For Kamuro I used the Jopete's formula:

 

0.29 Potassium nitrate
0.05 Sulfur
0.41 Pine charcoal
0.12 Titanium, 0-250 micron (60 mesh and finer), which will determine the density of the sparks
0.07 Dextrin
 
(I replaced the pine charcoal with coconut charcoal for long lasting sparks).


#14 Rando

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Posted 15 May 2019 - 08:40 PM

Pretty!




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