Ye Olde Rocket Forum

Go Back   Ye Olde Rocket Forum > The Golden Age of Model Rocketry > Plans & Publications
User Name
Password
Auctions Register FAQ Members List Calendar Today's Posts Search Mark Forums Read


Reply
 
Thread Tools Search this Thread Display Modes
  #21  
Old 01-20-2020, 07:56 PM
teflonrocketry1's Avatar
teflonrocketry1 teflonrocketry1 is offline
Craftsman
 
Join Date: Aug 2007
Location: Whitehouse, Ohio
Posts: 246
Default

Do you think that this ASJ Insulation tape https://www.mcmaster.com/76755a67 is the same stuff Enerjet and Centuri made the shock cord mounts from? Should I buy some and see if my K40 laser cutter can handle it?
__________________
Bruce S. Levison, NAR #69055
Reply With Quote
  #22  
Old 01-20-2020, 08:44 PM
astronwolf's Avatar
astronwolf astronwolf is offline
Master Modeler
 
Join Date: Mar 2013
Location: Northeast Ohio
Posts: 741
Default

Quote:
Originally Posted by teflonrocketry1
Do you think that this ASJ Insulation tape https://www.mcmaster.com/76755a67 is the same stuff Enerjet and Centuri made the shock cord mounts from? Should I buy some and see if my K40 laser cutter can handle it?

Go for it!
__________________
-Wolfram v. Kiparski
NAR 28643
MTMA
Contest flying, Sport flying, what's the fracking difference.....
Reply With Quote
  #23  
Old 01-20-2020, 08:50 PM
Earl's Avatar
Earl Earl is offline
Apollo Nut
 
Join Date: Dec 2006
Posts: 1,894
Default

Quote:
Originally Posted by teflonrocketry1
Do you think that this ASJ Insulation tape https://www.mcmaster.com/76755a67 is the same stuff Enerjet and Centuri made the shock cord mounts from? Should I buy some and see if my K40 laser cutter can handle it?


Could be; I wish they had a better photo of the material itself. That on the web page does not really show enough detail of the material to verify.

And the material Centuri used varied a bit over the years also. Sometimes, the foil layer was the prominent layer visible and other times the material seemed to be predominated by the paper layer. But in each case it was a mixture of foil, paper, and filaments of what appeared to be Fiberglas threads or nylon threads.

Earl
__________________
Earl L. Cagle, Jr.
NAR# 29523
TRA# 962
SAM# 73
Owner/Producer
Point 39 Productions

Rocket-Brained Since 1970
Reply With Quote
  #24  
Old 01-22-2020, 01:10 PM
Ez2cDave's Avatar
Ez2cDave Ez2cDave is offline
Craftsman
 
Join Date: Mar 2005
Posts: 485
Default

Quote:
Originally Posted by Earl
But in each case it was a mixture of foil, paper, and filaments of what appeared to be Fiberglas threads or nylon threads.

Earl


Hello, Earl !

I have long-suspected that the material that Centuri used was either some sort of heavy-duty packing / strapping tape . . . OR some type of HVAC Duct tape.

Dave F.
Attached Thumbnails
Click image for larger version

Name:  1a.jpg
Views: 20
Size:  117.9 KB  Click image for larger version

Name:  1b.jpg
Views: 16
Size:  179.7 KB  Click image for larger version

Name:  1c.jpg
Views: 12
Size:  97.9 KB  Click image for larger version

Name:  1d.jpg
Views: 16
Size:  87.9 KB  Click image for larger version

Name:  1e.jpg
Views: 11
Size:  113.2 KB  Click image for larger version

Name:  1f.jpg
Views: 13
Size:  145.3 KB  
__________________
"Failure Is Not An Option . . . Adapt & Overcome ! "

NAR # 26128 L2
TRIPOLI # 517 L2 ( inactive, at present )
Reply With Quote
  #25  
Old 01-22-2020, 01:20 PM
Ez2cDave's Avatar
Ez2cDave Ez2cDave is offline
Craftsman
 
Join Date: Mar 2005
Posts: 485
Default

Quote:
Originally Posted by Earl
Could be; I wish they had a better photo of the material itself. That on the web page does not really show enough detail of the material to verify.

Earl


Earl,

"Adapt & Overcome" . . . One must be resourceful, because "Failure Is Not An Option" !


https://www.amazon.com/s?k=Venture+...f=bl_dp_s_web_0

https://www.amazon.com/s?k=Venture+...ef=nb_sb_noss_2


https://www.amazon.com/Venture-Tape...5KQ/ref=sr_1_12

https://www.amazon.com/FSK-Foil-Scr...BSM/ref=sr_1_10


One example of a SIMILAR product . . .



Dave F.
__________________
"Failure Is Not An Option . . . Adapt & Overcome ! "

NAR # 26128 L2
TRIPOLI # 517 L2 ( inactive, at present )
Reply With Quote
  #26  
Old 01-22-2020, 09:04 PM
Earl's Avatar
Earl Earl is offline
Apollo Nut
 
Join Date: Dec 2006
Posts: 1,894
Default

The Nashua tape roll photo you attached looks pretty close to the material used for the late 70s Centuri SCFs.

As commented, the material Centuri used over the years changed somewhat. Even the shape of the SCF itself changed some too.

The very first version of the their SCF was a little shorter and a bit wider. These first versions had a top metallic surface with somewhat tight filament lines running through it. These were first used starting sometime in the summer of 1970, best Ive been able to pinpoint.

By about 72, the design had been lengthened a bit and made somewhat more narrow. I think this was done to make it a bit easier to get into smaller body tubes. The material used was a bit different too. The top layer is more of a whitish, paper-like covering, but has a foil layer underneath. The filament lines are there too, and maybe a bit more dense.

By the late 70s, the shape is the same longer, narrower design, but the material is once again a top shiny metallic layer, but the filaments are wider spaced, much like the Nashua tape roll in the large image you attached.

Ill attach a photo of the three in just a moment.

Earl

...and here's the photo. From left to right: first version, 1970; second version, circa 1972; third version, circa late 70s (didn't have one handy outside the package). The filaments in the paper covered middle version are hard to see, but are maybe a bit more dense than the first version.
Attached Thumbnails
Click image for larger version

Name:  Centuri SCFs--3533 copy.JPG
Views: 27
Size:  1.41 MB  
__________________
Earl L. Cagle, Jr.
NAR# 29523
TRA# 962
SAM# 73
Owner/Producer
Point 39 Productions

Rocket-Brained Since 1970
Reply With Quote
  #27  
Old 01-22-2020, 09:30 PM
LeeR's Avatar
LeeR LeeR is offline
Retired with Way Too Many Kits
 
Join Date: Jun 2007
Location: Colorado
Posts: 2,242
Default

Quote:
Originally Posted by Earl

[]

And the material Centuri used varied a bit over the years also. Sometimes, the foil layer was the prominent layer visible and other times the material seemed to be predominated by the paper layer. But in each case it was a mixture of foil, paper, and filaments of what appeared to be Fiberglas threads or nylon threads.

Earl


That reminds me. When I was building HPR rockets, Id use a patch of fiberglass drywall cloth, covering a Kevlar loop, with the knot poking out the aft end of the patch. Id then flood the patch with epoxy. From there Id affix my replaceable shock cordto the exposed loop. Those never came off. One roll from Home Depot was probably enough for 500 rocket or more.

If anyone wants a piece to sample, I could send you one. My roll is only about 1/2 gone. Most was used to repair long cracks in walls ...
__________________
Lee Reep
NAR 55948, L2

Projects: Super Sky Hook, Super X-Ray, Semroc Spaceman, Estes Phoenix
Awaiting Paint: Estes Saturn 1B
Last Completed: SuperNova
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump



All times are GMT -5. The time now is 08:35 AM.


Powered by: vBulletin Version 3.0.7
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Ye Olde Rocket Shoppe 1998-2020