Ye Olde Rocket Forum

Go Back   Ye Olde Rocket Forum > The Golden Age of Model Rocketry > Model Rocket History
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 11-08-2011, 12:17 PM
hcmbanjo's Avatar
hcmbanjo hcmbanjo is offline
When Pigs Fly!
 
Join Date: Sep 2005
Location: Orlando, FL
Posts: 1,102
Default Thickness of Mars Snooper Fin Stock?

I want to build and blog the Estes Mars Snooper, Kit #K-20.

The instructions from JimZ's website say the fin stock is #BF-20A and BF-20B.
Old Estes catalogs show the "20" designation as 1/16" thick balsa.

The laser cut Mars Snooper fins are listed on the Semroc site as 3/32".

Anybody know which thickness is correct?
__________________
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
  #2  
Old 11-08-2011, 12:50 PM
sandman's Avatar
sandman sandman is offline
Custom Cone, Kit & Decal Maker
 
Join Date: Mar 2005
Location: Way North of Detroit
Posts: 5,048
Default

Quote:
Originally Posted by hcmbanjo
I want to build and blog the Estes Mars Snooper, Kit #K-20.

The instructions from JimZ's website say the fin stock is #BF-20A and BF-20B.
Old Estes catalogs show the "20" designation as 1/16" thick balsa.

The laser cut Mars Snooper fins are listed on the Semroc site as 3/32".

Anybody know which thickness is correct?


Both thicknesses are used.

Thin stuff on the top fins, thick stuff on the bottom fins.
__________________
"I'm a sandman. I've never killed anyone. I terminate runners when their time is up." Logan from "Logan's Run"

http://sandmandecals.com/
Reply With Quote
  #3  
Old 11-08-2011, 01:04 PM
hcmbanjo's Avatar
hcmbanjo hcmbanjo is offline
When Pigs Fly!
 
Join Date: Sep 2005
Location: Orlando, FL
Posts: 1,102
Default

Quote:
Originally Posted by sandman
Both thicknesses are used.

Thin stuff on the top fins, thick stuff on the bottom fins.


Thanks Sandman, that makes sense!
On the JimZ page, the bottom fins are on one sheet (the 3/32")
the top fins and cooling vanes are on a second sheet. (the 1/16")
__________________
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 11-08-2011, 02:06 PM
ghrocketman's Avatar
ghrocketman ghrocketman is offline
President, MAYHEM AGITATORS, Inc.
 
Join Date: Jul 2005
Location: Nunya Bizznuss, Michigan
Posts: 13,443
Default

Estes has had 5 fin stock thicknesses in the past; they were always the same thickness per part number, they did not change.

BFS-10x = 1/32
BFS-20x = 1/16
BFS-30x = 3/32
BFS-40x = 1/8
BFS-60x = 3/16

There never was a BFS-50x, but using the convention above, it would have been 5/32.

Interestingly enough, the Mars Snooper II used ONLY BFS-20 fin stock for its die-cut fins, part number 32205.
__________________
When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL
, if you have to ask what is "NORMAL" , you probably aren't !

Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, and HAVOC !
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 08:11 AM.


Powered by: vBulletin Version 3.0.7
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Ye Olde Rocket Shoppe © 1998-2024