Joining two cords...quick link or no?

I currently have two 4" HPR kits nearly complete, and on both I used a 4' length of 3/8" tubular kevlar attached to the forward centering ring using a 1/4" quick link attached to a 1/4" U-bolt.

On the other end of the kevlar I'm going to attach 9/16" nylon out to the chute/nose. My first thought was to attach the kevlar cord to the nylon cord using 3/16" or 1/4" quick links. Upon further consideration, however, I realized the kevlar only sticks up a few inches beyond the end of the booster section.

1) If I attach the kevlar to the nylon with a quick link, is there a potential for the quick link to beat the crap out of the booster tube? Tube material is canvas phenolic on one rocket and FG on the other.

2) Would it be better to just knot the nylon to the kevlar? Both cords are factory-sewn and sealed into loops on the ends.

I tie each string together. Less weight and saves space inside rocket. If you go the quick link route, just tape some foam around the quick link once both ends are linked. Good luck on your next project

I use a bowline to connect all my shock cords, even when lengthening Kevlar to nylon.

2) Would it be better to just knot the nylon to the kevlar? Both cords are factory-sewn and sealed into loops on the ends.[/QUOTE]

No knots. Make a loop to loop connection. Google fishing knots and search for loop to loop connection.

Jozef said:

No knots. Make a loop to loop connection. Google fishing knots and search for loop to loop connection.

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Tried it and I like it. Quick, simple, and secure.

Glad you like it....easy to change out, or swap between rockets too

timbucktoo said:

I use a bowline to connect all my shock cords, even when lengthening Kevlar to nylon.

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Isn't it called a Sheet Bend when you connect two ropes, but a bowline when you make a loop at the end of a single rope? Basically the same technique, though.

Or are you talking about making two bowline loops in each rope and then using the loop-to-loop connection?

GlenP said:

Isn't it called a Sheet Bend when you connect two ropes, but a bowline when you make a loop at the end of a single rope? Basically the same technique, though.

Or are you talking about making two bowline loops in each rope and then using the loop-to-loop connection?

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I tie a bowline to another bowline.

muddymooose said:

2) Would it be better to just knot the nylon to the kevlar? Both cords are factory-sewn and sealed into loops on the ends.

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If you have factory loops on both ends, just feed the loop of line A through the loop of line B, and then take the other end of line A and feed it through the loop of A that is feed through loop B. Pull it tight.