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
  #11  
Old 10-27-2005, 01:43 PM
Challenger I Challenger I is offline
Stuck in the 80's
 
Join Date: Oct 2005
Location: Montreal, Quebec, Canada
Posts: 3
Default

Quote:
Originally Posted by ghrocketman
The date code on all my E15's is '10X5'
How does on de-cipher this ?

A 10X5 date code on your motor would translate into May 10th, 1993. As you might have guessed, the letter indicates the year. X=1993, Y=1994, Z=1995, A=1996, B=1997, etc. If I'm not mistaken, Estes started letter coding the year in 1975 and stopped in 1999 and then they went back to a numeric year from 2000 onwards.
Reply With Quote
  #12  
Old 10-27-2005, 05:49 PM
Green Dragon Green Dragon is offline
AL Swackhammer , power freak
 
Join Date: Sep 2005
Location: New York
Posts: 1,204
Default

>Originally Posted by ghrocketman
>The date code on all my E15's is '10X5'
>How does on de-cipher this ?

ok, having flown or sold all my remaining E15's... with only a few catos.... have a question .

there were certain date codes that were initially recalled on thes4e - anyone still kow what those were ?

I think the 10x5 is ok, some casing I have are marked such .

the last pak I had ( sold on ROL ) was the 'recall' date code, as I recall, so never opened em up and tried them .
just don't remember at present what the 'bad' dates were.

i *DO* reccomend clustering them up, maiden flight of my 3.2" upscaled Estes Pathfinder was 4 x E15's, same with my Estes "pro" Patriot - both great ! :-)

later catos will go unmentioned, cost me a couple nice birds :-(

~ AL
Reply With Quote
  #13  
Old 10-28-2005, 12:21 AM
SEL's Avatar
SEL SEL is offline
Officially Middle-Aged Rocketeer
 
Join Date: Mar 2005
Location: Portland, OR
Posts: 1,062
Default

I believe some of the 'bad' motors were 15X. For some reason I remember reading that the 10X's were bad, too, but I could be wrong. I flew 8 or 10 of them before my first and only CATO. Called Estes to report it, and whoever answered the phone asked me a couple of questions ("Was it a big rocket?" "Yeah, a scratch-build from parts") and sent me 2 packs of D12's and a Designers Special (no complaints about that!!). They were really fun motors.

Sean


Quote:
Originally Posted by Green Dragon
>Originally Posted by ghrocketman
>The date code on all my E15's is '10X5'
>How does on de-cipher this ?

ok, having flown or sold all my remaining E15's... with only a few catos.... have a question .

there were certain date codes that were initially recalled on thes4e - anyone still kow what those were ?

I think the 10x5 is ok, some casing I have are marked such .

the last pak I had ( sold on ROL ) was the 'recall' date code, as I recall, so never opened em up and tried them .
just don't remember at present what the 'bad' dates were.

i *DO* reccomend clustering them up, maiden flight of my 3.2" upscaled Estes Pathfinder was 4 x E15's, same with my Estes "pro" Patriot - both great ! :-)

later catos will go unmentioned, cost me a couple nice birds :-(

~ AL
Reply With Quote
  #14  
Old 10-28-2005, 09:52 AM
Shreadvector's Avatar
Shreadvector Shreadvector is offline
Launching since 1970.
 
Join Date: Mar 2005
Location: Southern California
Posts: 2,051
Default

Come on folks, use those computers and those search buttons.

http://groups.google.com/group/rec....3f62c574c667ff5

NAR S&T MOTOR DECERTIFICATION NEWS


Effective immediately, Estes E15 motors with date codes
of 13X10 and 15X11 are decertified for general and contest use.
In April 1994, Estes Industries officially recalled E15 motors
with these two date codes. MESS data collected by NAR Standards
and Testing since August 1994 substantiates this action.


Only these production lots are immediately decertified.
If you possess these motors, Estes asks that you contact your
local retailer for a product exchange in accordance with the recall
announcement issued by Estes to its distributors and retailers.


Due to a year long production hiatus, all other Estes E15
motors will lose contest certification on 1-July-95, except
for contest use at NARAM 37. General use certification will
expire in three years, on 1-July-98, per S&T decertification policy.


At the time these motors are reintroduced, they will undergo
a full certification test as if they were new, first-time motors.


Jim Cook, Secretary for
NAR Standards & Testing

IIRC, there was a casing problem (too large of an ID?) that casued the propellant to casing bond to fail after they finished drying ("curing") after many months. The new E9 underwent EXTENSIVE casing testing, as did the 13, 18 and 24mm motor line. They even added an extra code to motors to indicate casing manufacturer as they fielded casings from 2 different manufacturers so they could track failures if they occurred.

Quote:
Originally Posted by SEL
I believe some of the 'bad' motors were 15X. For some reason I remember reading that the 10X's were bad, too, but I could be wrong. I flew 8 or 10 of them before my first and only CATO. Called Estes to report it, and whoever answered the phone asked me a couple of questions ("Was it a big rocket?" "Yeah, a scratch-build from parts") and sent me 2 packs of D12's and a Designers Special (no complaints about that!!). They were really fun motors.

Sean
Reply With Quote
  #15  
Old 10-28-2005, 12:51 PM
Challenger I Challenger I is offline
Stuck in the 80's
 
Join Date: Oct 2005
Location: Montreal, Quebec, Canada
Posts: 3
Default

So that's what the extra letter is for. I wonder what the "A" and the "S" actually stand for? Supplier names? City names?
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 09:19 PM.


Powered by: vBulletin Version 3.0.7
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Ye Olde Rocket Shoppe 1998-2017