Forum

Blog

Blog Post

Welcome, Guest
Username: Password: Remember me

TOPIC: Shock Cord Mounting on Damaged Model

Shock Cord Mounting on Damaged Model 2 weeks 3 days ago #2739

  • Robert Bantly
  • Robert Bantly's Avatar
  • Offline
  • Junior Boarder
  • Posts: 26
  • Thank you received: 3
  • Karma: 1
I had a couple crashes on CIRFF. My 24 year old Broadsword should have had the shock cord replaced when I put a new chute in but I overlooked that. Nose cone is in Winchester by now...
Since my Estes Star Orbiter shock cord also failed - it was brand new and snapped mid line - perfect diagonal, I don't want to use that stuff anymore. Nose cone came down with parachute and jolly logic sigh.
I have some Kevlar but am confused about where / how to mount it in a completed model. Since I am repairing and refinishing, I thought about sanding through the paint at the upper body tube join, drilling a small hole through tube and coupler, and passing the line with a knot through it. Then epoxy with a little balsa or basswood cover over the knot and edges smoothed with putty. Yes, I have learned epoxy now.
Will this sort of a mounting work? Can't get to the front centering ring on the stuffer tube w/o cutting the model.

Cheers / Robert
The administrator has disabled public write access.

Shock Cord Mounting on Damaged Model 2 weeks 3 days ago #2740

  • Darrell Sisson
  • Darrell Sisson's Avatar
  • Offline
  • Fresh Boarder
  • Posts: 9
  • Thank you received: 2
  • Karma: 0
I have used kevlar mounted the Estes way. So far no problems.
The administrator has disabled public write access.

Shock Cord Mounting on Damaged Model 2 weeks 2 days ago #2741

  • Robert Bantly
  • Robert Bantly's Avatar
  • Offline
  • Junior Boarder
  • Posts: 26
  • Thank you received: 3
  • Karma: 1
Thank you Darrell - could add an extra fold or two to the shock mount since I have a fair amount. Going to use higher test also. I got all the fins back on and started sanding down the paint job - boy was there a lot of paint on this kit! I let both kids try the rattle can - no runs but lots and lots and lots of paint! Then I had to cover up and finish. Using 150 grit. Looks like the the 24 year old kit will fly again with a secure shock cord and a nicer paint job. Will still be purple, though since they chose that.
The administrator has disabled public write access.

Shock Cord Mounting on Damaged Model 2 weeks 2 days ago #2742

  • Dennis
  • Dennis's Avatar
  • Offline
  • Gold Boarder
  • Posts: 197
  • Karma: 2
I get out to launches so infrequent any more, that I've had similar problems with the old rubber band style and elastic shock cords. I've been replacing them with similar but hadn't thought of mounting kevlar the Estes way. Thanks.

For some of my builds , I have actually used some thin braided wire (some my wife had when her ADD had her making stamped jewelry and stuff) attached to the engine mount in a loop part way up the length of the body tube, and I attach the shock cord (kevlar usually) to that. That way, if the shock cord starts to fray or breaks, I just connect a new one to the wire loop. It'll be a bit tricky to thread a new one down in the smaller diameter tubes, but should be doable.
The administrator has disabled public write access.

Shock Cord Mounting on Damaged Model 2 weeks 1 day ago #2743

  • Robert Bantly
  • Robert Bantly's Avatar
  • Offline
  • Junior Boarder
  • Posts: 26
  • Thank you received: 3
  • Karma: 1
Fixed it last night. After MUCH thought I went ahead and drilled a hole through the upper body tube, got some 400# test Kevlar line, and made Broadsword a nice long unbreakable shock cord. Glued a piece of basswood to the body tube - wrapped sandpaper around tube to contour it, used a Dremel to hollow out, and glued over Kevlar thread. I think both ways will work but I wanted that big glob o' glue to be certain. Just need a tape wad at the BT-nose cone junction. I'll sand down the basswood wart tonight. 4 fins, shock cord, just needs putty, paint, and a new nose cone now!
Cheers / Robert
The administrator has disabled public write access.
Time to create page: 0.068 seconds