Ye Olde Rocket Forum

Go Back   Ye Olde Rocket Forum > The Doctor is In! > Ask the Doctor
User Name
Password
Auctions Register FAQ Members List Calendar Today's Posts Search Mark Forums Read


Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 09-13-2019, 08:10 PM
craviola990 craviola990 is offline
Junior Rocketeer
 
Join Date: Jan 2006
Posts: 3
Default Estes Interceptor - Parachute & Shock Cord Question

Hi Folks -

My name is Christian; joined the forum some years ago, but now finally getting back into rocketry with much enthusiasm. I started in 1971 (Age 10) with Vashon Cold Power, by '73 into solid fuel, and launched throughout the '70s.

Dabbled again in the mid '90s, and now back in full force.

Like so many "Kids my age", I went nuts over the Interceptor, and have a new one almost ready to fly. I see more and more, folks hooking up their parachute swivels a few inches down the shock cord, as opposed to the nose cone...would I be smart to do this on the Interceptor?

Jeff Smith also installed an extra long, kevlar cord, BTW

Is there a special, particular way to form this loop knot in the shock cord, to accept a snap swivel?

Please pardon my gross stupidity...it's been awhile! I assume this mounting helps keep nose cones from tanglng/fighting the shroud lines upon ejection/decent?

I notice no one talks about putting talcum powder on chutes anymore pre-launch..new chute materials, just not needed?

Thanks!

Last edited by craviola990 : 09-13-2019 at 09:38 PM.
Reply With Quote
  #2  
Old 09-13-2019, 10:13 PM
Earl's Avatar
Earl Earl is offline
Apollo Nut
 
Join Date: Dec 2006
Posts: 1,816
Default

I always use a length of shock between the chute and nose cone roughly the same length (or a tad bit longer) of the nose cone. And yes, in my experience it helps keep the nose cone from entangling itself in the chute shroud lines.

As for the knots to attach a snap swivel (and yes, I use those too), I just do a double overhand knot and a little dab of glue to keep the knot from unraveling.

And chute powder...I still use it, if it is a brand new chute or it hasnít had any chute powder applied in some time. Generally, the powder residue sticks and provides Ďprotectioní for a number of flights. But, if you are needing some extra spotting dust for high alt flights, then maybe another decent dose. But yes, basically, I still use it on chutes.

Good luck...and welcome back!!

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

Rocket-Brained Since 1970
Reply With Quote
  #3  
Old 09-13-2019, 10:24 PM
hcmbanjo's Avatar
hcmbanjo hcmbanjo is offline
When Pigs Fly!
 
Join Date: Sep 2005
Location: Orlando, FL
Posts: 977
Default

Hi Christian,
Welcome back!
I agree with Earl, tying the chute away from the nose cone can prevent most tangles.
Here's a few blog posts on Kevlar to shock cord ties:

http://modelrocketbuilding.blogspot...ips-part-1.html
http://modelrocketbuilding.blogspot...ips-part-2.html

A simple overhand knot to attach the chute is shown in the second picture:
http://modelrocketbuilding.blogspot...ent-tip_28.html
__________________
Hans "Chris" Michielssen
Old/New NAR # 19086 SR

www.oddlrockets.com
www.modelrocketbuilding.blogspot.com
http://www.nar.org/educational-reso...ing-techniques/
Your results may vary
"Nose cones roll, be careful with that."
Every spaceman needs a ray gun.
Look out - I'm the Meister Shyster!
Reply With Quote
  #4  
Old 09-14-2019, 08:40 AM
astronwolf astronwolf is offline
Master Modeler
 
Join Date: Mar 2013
Location: Northeast Ohio
Posts: 693
Default

Quote:
Originally Posted by craviola990
I notice no one talks about putting talcum powder on chutes anymore pre-launch..new chute materials, just not needed?

I still use talcum powder on polyethylene parachutes. You have to, IMHO. Many people don't, and wonder why their rocket comes down under a "para-wad."

Earlier this year it seemed that talcum powder (real talcum powder, not corn starch) was quietly being phased out due to a consumer scare. I stocked up, though I now no longer believe that talcum powder was being phased out of consumer products.
-W
__________________
-Wolfram v. Kiparski
NAR 28643
MTMA
Contest flying, Sport flying, what's the fracking difference.....
Reply With Quote
  #5  
Old 09-14-2019, 05:50 PM
craviola990 craviola990 is offline
Junior Rocketeer
 
Join Date: Jan 2006
Posts: 3
Default

Guys, thanks so much for the replies, really appreciate the help!

I'm replacing the Estes chute with this nylon one from Apogee...any talc needed for a chute like this?

https://www.apogeerockets.com/Build...Path=42_309_81&

Thanks!

Last edited by craviola990 : 09-14-2019 at 06:22 PM.
Reply With Quote
  #6  
Old 09-14-2019, 08:23 PM
Earl's Avatar
Earl Earl is offline
Apollo Nut
 
Join Date: Dec 2006
Posts: 1,816
Default

No, not needed on nylon chutes.


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

Rocket-Brained Since 1970
Reply With Quote
  #7  
Old 09-15-2019, 06:39 AM
mojo1986's Avatar
mojo1986 mojo1986 is offline
Master Modeler
 
Join Date: Mar 2005
Location: Kingston, CANADA
Posts: 1,775
Default

Great looking 'chute BTW.
Reply With Quote
  #8  
Old 09-15-2019, 11:13 AM
ghrocketman's Avatar
ghrocketman ghrocketman is offline
President, MAYHEM AGITATORS, Inc.
 
Join Date: Jul 2005
Location: Michigan
Posts: 9,427
Default

You can use Carpenter's Marking Powdered chalk on chutes too.
Placing a bit directly on the top of chute before installing the nose cone results in a colored "smoke" puff at ejection which can aid recovery on high altitude flights.
__________________
When in doubt, WHACK the GAS and DITCH the brake !!!
No Harm=NO Foul advocate

If you are NOT FLYING LOW in the left lane, you need to GET THE #$&@ OUT of it !

Yes, there is such a thing as NORMAL
, if you have to ask, you probably aren't
!
Reply With Quote
  #9  
Old 09-15-2019, 01:51 PM
Scott_650 Scott_650 is offline
Craftsman
 
Join Date: Sep 2015
Posts: 197
Default

Quote:
Originally Posted by Earl
No, not needed on nylon chutes.


Earl


Since I have a BIG shaker bottle of talc based baby powder leftover from many years ago I still powder my nylon chutes - it just isnít a rocket prep session without that new baby smell!
Reply With Quote
  #10  
Old 09-16-2019, 05:16 PM
craviola990 craviola990 is offline
Junior Rocketeer
 
Join Date: Jan 2006
Posts: 3
Default

Thanks guys for all this valuable info. Been poking around the forum a bit more, a real wealth of information here.

Thanks again!

Chris
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 02:18 AM.


Powered by: vBulletin Version 3.0.7
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Ye Olde Rocket Shoppe © 1998-2019