Shock cord

Garyaero

Active Member
Joined
Mar 20, 2017
Messages
25
Reaction score
0
What is the best way to attach shock cord and parachute lines to a balsa nose cone
 

T-Rex

Ordinary Average Guy
TRF Supporter
Joined
Jul 22, 2011
Messages
3,102
Reaction score
123
You can also go old school. Screw the eye into the balsa, then remove it. Then fill the hole with wood glue, and reinsert the eye. A more modern method along the same lines would be put some thin CA in the hole to harden it. Medium or Thick CA would glue the eye in, but I am not sure how well either would harden the balsa.
 

hcmbanjo

Well-Known Member
Joined
Jan 18, 2009
Messages
2,401
Reaction score
277
I agree with T-Rex:
"You can also go old school. Screw the eye into the balsa, then remove it. Then fill the hole with wood glue, and reinsert the eye."

I would recommend tying on the parachute on the shock cord, 1/3 the way down from the nose cone.
Shock cords supplied in kits are usually too short, you may want to get a longer elastic cord at a fabric store.
When the shock cord is tied at the nose cone screw eye, during recovery the nose cone flips in and out of the shroud lines and tangles up the parachute.

For tying the shock cord to the nose cone screw eye or "lug" I use the
DUNCAN UNI-KNOT
Go to this link and scroll down to the sixth knot picture. Click on the name to go to Animated Knots -
https://modelrocketbuilding.blogspot.com/2013/01/knots-part-2.html

KNOT duncan_(uni)_knot.jpg

For tying the Kevlar shock cord to the elastic shock cord:
https://modelrocketbuilding.blogspot.com/2016/06/a-better-shock-cord-knot-tips-part-2.html

Kevlar Elastic Knot 4.jpg
 

rstaff3

Oddroc-eteer
Joined
Jan 17, 2009
Messages
11,763
Reaction score
25
For me, on big or heavy cones, I prefer a hardwood plug or much longer hook eye (which normally uses a nut). My current build has a light cone and I used the glue method - screwed it in, took it out, added thin CA, wiped wood glue on the.threads and put it back.

There are lots of skinless cats in rocketry.
 

Latest posts

Top