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Fusing a rocket with quick match?


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#1 Uarbor

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Posted 22 June 2022 - 09:21 AM

I want to mount a comet on top of my ball shell that is on my rocket. I want the quick match to light the comet and then quickly launch the rocket. I have never fused quick match into the bottom of a rocket. Not sure exactly how to attach it. I usually just J hook my visco fuse. I'm thinking just Jam the end of the quick match up there and then tape it to the stick? I'm a bit worried that quick match will shoot fire all the way up to the Core which would not be what I usually do and my Rockets are very hot I don't want it to explode. Thanks in advance for any suggestions.

#2 Arthur

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Posted 22 June 2022 - 10:27 AM

I've never seen a rocket where the effect is lit at the same time as the motor. ALL the rockets I've seen have risen under power, then coasted to apogee then the payload has lit to burn while falling.

 

However to achieve your project you could fix the star at the top and use two pieces of (same reel) visco cut to the same length, to light in both place at the same time.



#3 Uarbor

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Posted 22 June 2022 - 12:02 PM

I've never seen a rocket where the effect is lit at the same time as the motor. ALL the rockets I've seen have risen under power, then coasted to apogee then the payload has lit to burn while falling.
 
However to achieve your project you could fix the star at the top and use two pieces of (same reel) visco cut to the same length, to light in both place at the same time.

that does sound like a good idea with the VSCO I could use 2 equal length of fast VSCO attached to some slow to start out. I got the quick match idea from Ned Gorski check out the first rocket in this video.

https://youtu.be/gUv-FbF4vzE

Edited by Uarbor, 22 June 2022 - 12:05 PM.


#4 Arthur

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Posted 22 June 2022 - 12:09 PM

It's fusing! There must be a dozen ways to fuse everything in order.



#5 Uarbor

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Posted 22 June 2022 - 12:12 PM



This was the specific video that gave me the idea. I asked him about it in the comments and he confirmed that's how it was done. I just made my very first batch of black match just for this project. But I must say I liked your idea a little better

#6 Uarbor

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Posted 22 June 2022 - 12:16 PM

It's fusing! There must be a dozen ways to fuse everything in order.

my main concern was the quick match shooting fire all the way up to the top of the core potentially exploding my motor. Your idea solves that problem and is less work.

Edited by Uarbor, 22 June 2022 - 12:17 PM.

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#7 TheMetalKing

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Posted 30 June 2022 - 07:24 AM

my main concern was the quick match shooting fire all the way up to the top of the core potentially exploding my motor. Your idea solves that problem and is less work.


I believe the issue I came across most recently was using black match to ignite the core, causing a cato.
On my cohete motors I use black match to fuse, although larger core than a skinny spindle BP rocket.

I quite like the idea of using two similarly sized visco sections to tine the ignition of the comet to the motor.

#8 Arthur

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Posted 30 June 2022 - 05:51 PM

The way I understand rockets is that the spindle on the tool makes a tapered hole in the fuel, the surface of the hole should all be burning at the same time.



#9 Uarbor

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Posted 01 July 2022 - 07:59 AM

The way I understand rockets is that the spindle on the tool makes a tapered hole in the fuel, the surface of the hole should all be burning at the same time.

yes this is true but it ignites at the bottom and progresses up quickly. I have read a bunch of posts where people who had a slow take off would wrap their fuse in foil so that it would ignite at the top of the core giving a much faster take off and often catoing. I believe it is because it was ignited while the nozzle was obstructed by aluminum foil. Your suggestion with the visco is the way I'm going anyway. It saves a bunch of time and effort and worry LOL. I have zero experience with quick match. Which is the main reason I started this thread. I only just made my first batch of black match. All of my mortar tubes are drilled near the bottom to accept visco and I mainly use them to launch comets. I really don't make any reloadable type shells or comets. Rockets are my main deal/ obsession.

Edited by Uarbor, 01 July 2022 - 08:06 AM.


#10 pyrokid

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Posted 03 July 2022 - 06:05 PM

In this context it seems ideal to learn to use quickmatch rather than wasting copious lengths of visco. It is not safe to have long lengths of visco attached to pyrotechnic effects because the long delay between ignition and effect adds uncertainty to the timing. Black match and quickmatch are cheap and very effective. Knots can be tied in quickmatch to arrest the flow of hot gasses, mitigating to some extent the problem of core overpressure.

Edited by pyrokid, 03 July 2022 - 06:06 PM.


#11 Uarbor

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Posted 04 July 2022 - 11:38 AM

In this context it seems ideal to learn to use quickmatch rather than wasting copious lengths of visco. It is not safe to have long lengths of visco attached to pyrotechnic effects because the long delay between ignition and effect adds uncertainty to the timing. Black match and quickmatch are cheap and very effective. Knots can be tied in quickmatch to arrest the flow of hot gasses, mitigating to some extent the problem of core overpressure.

I agree. Thanks for the tip with the knot. I am still going to do a one-off with visco as proof of concept I have some that burns a half second per foot. And I have quite an abundance of it because it's what I use to pass fire to my rocket headers. And I am still rolling tubes for quick match getting ready to learn.

Edited by Uarbor, 04 July 2022 - 11:39 AM.





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