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Homemade 70 mm shell with red peony!


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#1 BengalFlair

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Posted 05 May 2015 - 11:14 PM

It's rather hot and dry weather right here which is favourable for making strontium nitrate based stars,so made some and fired a 70 mm shell and would like to share with you.

 


Edited by BengalFlair, 06 May 2015 - 05:43 PM.

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#2 pyrokid

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Posted 06 May 2015 - 10:33 AM

Great shell! What is the pasting method?



#3 BengalFlair

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Posted 06 May 2015 - 11:36 PM

Thank you  :)

Due to non-availability of plastic and paper hemis right here I usually make newspaper hemis myself or use plastic kids’ balls for my shells. This shell was made of ordinary plastic ball for kids. I cut the ball in two halves and made a hole for spollette and fixed it with glue. After loading the shell I mated two halves firmly and fixed it with masking tape. Then I applied two layers of kraft paper and finally pasted with two circular pieces of cotton fabric and wood glue from pole to pole. So it may be called a hybrid shell.

 



#4 sora

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Posted 10 May 2015 - 08:25 AM

Great one Ben, as usual.

The pink fuse looks a bit uncommon, is that handmade too?

 

Thanks



#5 BengalFlair

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Posted 11 May 2015 - 10:34 PM

Thank you  :)

The pink fuse is not homemade.

It’s actually a visco fuse with burn rate of about 3sec/inch which is recently available right here. 



#6 sora

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Posted 12 May 2015 - 12:24 PM

Viscos are being available? Thats great news indeed.



#7 debubisu

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Posted 21 June 2015 - 06:29 AM

Viscos are being available? Thats great news indeed.

where i go for visco fuse in bengal



#8 debubisu

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Posted 21 June 2015 - 06:50 AM

pls share the composition for making it



#9 asdercks

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Posted 21 June 2015 - 12:05 PM

 How are you pasting your shells and what are you using?  in the vid it looks like some sort of fabric?

Nice shell by the way!!!!!!!


Edited by asdercks, 21 June 2015 - 12:07 PM.

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1. The talent of an artist.   2. The hand of a sculptor.   3. The heart of a poet.   4. The eye of a painter. 
5. The courage of a warrior.  -passfire movie.

#10 BengalFlair

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Posted 21 June 2015 - 12:41 PM

@debubisu I think you actually wanted to know the composition of stars. It was a slight variation of ‘independence

red’ and regarding visco, I don’t know the right location as I got it from a friend.

 

@asdercks Thank you :)

Please check out post #3 for your answer.



#11 sora

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Posted 21 June 2015 - 12:55 PM

Dear Ben,

 

Did you use Parlon in the modified version of  "Independance Red"? If so, under what name it is sold there?


Edited by sora, 21 June 2015 - 12:59 PM.


#12 asdercks

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Posted 21 June 2015 - 03:20 PM

@debubisu I think you actually wanted to know the composition of stars. It was a slight variation of ‘independence

red’ and regarding visco, I don’t know the right location as I got it from a friend.

 

@asdercks Thank you :)

Please check out post #3 for your answer.

thanks bengal, I completely missed the post where you said how you pasted your shell  :P


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1. The talent of an artist.   2. The hand of a sculptor.   3. The heart of a poet.   4. The eye of a painter. 
5. The courage of a warrior.  -passfire movie.

#13 BengalFlair

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Posted 22 June 2015 - 04:07 AM

Dear Ben,

 

Did you use Parlon in the modified version of  "Independance Red"? If so, under what name it is sold there?

 

'Chlorinated rubber', 'Chlorub'. 



#14 Shunt

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Posted 22 June 2015 - 06:56 PM

"Then I applied two layers of kraft paper and finally pasted with two circular pieces of cotton fabric and wood glue from pole to pole. So it may be called a hybrid shell."

 

Nice shell!

 

I wanted to experiement with pasting shells with heavy cotton fabric, like old blue jeans since it is so strong but never got around to it.  Glad to see my thoughts might be in the right direction, as it worked out quite well for you! 



#15 dynomike1

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Posted 09 July 2015 - 01:34 PM

Good looking shell. I see i am not the only one using Dixie cups.


There are very few problems that cant be solved with explosives.
                             Explosives are a bang up job.

#16 debubisu

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Posted 02 October 2015 - 09:07 AM

hi ,bengalFlair

i came back again. i want to know ,can i substitute pine resin with redgum and pvc powder for parlon in this star formula ? because these are not  available here.    

#17 BengalFlair

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Posted 03 October 2015 - 07:28 AM

 

hi ,bengalFlair

i came back again. i want to know ,can i substitute pine resin with redgum and pvc powder for parlon in this star formula ? because these are not  available here.    

 

You can substitute shellac for redgum and pvc for parlon but you will have to change the proportion of the ingredients of the composition especially mgal and pvc to achieve an acceptable red star. Following would be a good start for you-

Strontium nitrate-50

Magnalium50/50 (200 m)-22

PVC-12

Shellac-10

dextrin-6



#18 debubisu

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Posted 03 October 2015 - 09:45 AM

thank you , bengalFlair

 

#19 debubisu

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Posted 03 October 2015 - 09:58 AM

can i add a little percentage(4 to 6%) of sulfur for burning speed up ?



#20 BengalFlair

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Posted 03 October 2015 - 11:39 AM

can i add a little percentage(4 to 6%) of sulfur for burning speed up ?

Yep.






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