shelf life of AP motors

shelf life of AP motors

Post by bswar » Sat, 26 Jun 2004 01:11:38



I have some Aerotech AP reloads (nothing over "F") that are about 8 years
old.
Junk?
I may donate them to the local Tripoli club in San Diego if they are still
useable.
Also a bunch of estes BP engines which I'll probably soak in water.
Dave B.
 
 
 

shelf life of AP motors

Post by Rick Dickinso » Sat, 26 Jun 2004 01:54:28


On Thu, 24 Jun 2004 09:11:38 -0700, "bswarm"

Quote:

>I have some Aerotech AP reloads (nothing over "F") that are about 8 years
>old.
>Junk?
>I may donate them to the local Tripoli club in San Diego if they are still
>useable.
>Also a bunch of estes BP engines which I'll probably soak in water.
>Dave B.

None of these are junk.  Find a local rocket club (thru the NAR
section list, online, or the equivalent on the Tripoli web site), and
give them to a good home.

Please don't soak the Estes engines in water!  Dispose of them
properly (in a rocket <grin> ).

 - Rick "Society for Motor Preservation"***inson
--
"Imagine standing at a street corner and spitting on people to
get their attention, then trying to sell them something.
Spamming is a better marketing method than that only in that you
get punched less often."    --  Esa E. Peuha

 
 
 

shelf life of AP motors

Post by Fred Shecte » Sat, 26 Jun 2004 01:58:54


Estes motors (BP) can last FOREVER if stored properly (no extreme temperature cycles - and
you should fire them at a temperature less than 75 degrees F below the highest temperature
they ever experienced).

Aerotech motors can sometimes develop a crust on the exposed propellant surface. A
seriously dipped Magnelite will burn through the crust - just make sure it is dipped the
entire length of the core with ignition starting at the top.

-Fred Shecter NAR 20117
http://cgi6.ebay.com/ws/eBayISAPI.dll?ViewSellersOtherItems&userid=sh...
--
"""Remove "zorch" from address (2 places) to reply.

Quote:
> I have some Aerotech AP reloads (nothing over "F") that are about 8 years
> old.
> Junk?
> I may donate them to the local Tripoli club in San Diego if they are still
> useable.
> Also a bunch of estes BP engines which I'll probably soak in water.
> Dave B.

 
 
 

shelf life of AP motors

Post by DJ Delori » Sat, 26 Jun 2004 02:40:24


Quote:

> Please don't soak the Estes engines in water!  Dispose of them
> properly (in a rocket <grin> ).

At our last launch, I convinced my wife to do the honors for the last
launch of the day (my Rickter Recker on E9's).  She was afraid to,
claiming "If *I* do it, it will probably just blow up."  My response?
"It's a rocket engine.  It's supposed to blow up."  The launch went
fine.
 
 
 

shelf life of AP motors

Post by alma » Sat, 26 Jun 2004 09:44:10



Quote:
> Estes motors (BP) can last FOREVER if stored properly (no extreme

temperature cycles - and

Quote:
> you should fire them at a temperature less than 75 degrees F below the
highest temperature
> they ever experienced).

he he.. My Estes motors have been exposed to 89 degrees F.

So I must fly them at no warmer then 14 degrees ? Burrrrr......

Quote:

> Aerotech motors can sometimes develop a crust on the exposed propellant
surface. A
> seriously dipped Magnelite will burn through the crust - just make sure it
is dipped the
> entire length of the core with ignition starting at the top.

> -Fred Shecter NAR 20117

http://cgi6.ebay.com/ws/eBayISAPI.dll?ViewSellersOtherItems&userid=sh...
Quote:
> --
> """Remove "zorch" from address (2 places) to reply.


> > I have some Aerotech AP reloads (nothing over "F") that are about 8
years
> > old.
> > Junk?
> > I may donate them to the local Tripoli club in San Diego if they are
still
> > useable.
> > Also a bunch of estes BP engines which I'll probably soak in water.
> > Dave B.

 
 
 

shelf life of AP motors

Post by RayDunak » Sat, 26 Jun 2004 10:05:56


<< I have some Aerotech AP reloads (nothing over "F") that are about 8 years
old. Junk?>>

They should be fine, as long as they've been stored reasonably well. (No water
damage, etc.) The grains may have developed some white crust or spots, but that
won't affect use. Just brush it out of the core so it won't interfere with
ignition.

<< Also a bunch of estes BP engines which I'll probably soak in water. >>

These too should be useable unless water damaged or exposed to excessive
variation of temperature. If you don't want 'em, donate them to someone.

 
 
 

shelf life of AP motors

Post by Fred Shecte » Sat, 26 Jun 2004 11:38:52


Reading comprehension:

If I say to put a shelf less than 75 centimeters below the ceiling, you will put it
between zero and 75 centimeters below and no more than 75 centimeters below.

Now re-read what I said about the temperature.
:-)

--
-Fred Shecter
Auctions:
http://cgi6.ebay.com/ws/eBayISAPI.dll?ViewSellersOtherItems&include=0...

To reply by e-mail, remove zorch two places.


Quote:


> > Estes motors (BP) can last FOREVER if stored properly (no extreme
> temperature cycles - and
> > you should fire them at a temperature less than 75 degrees F below the
> highest temperature
> > they ever experienced).

> he he.. My Estes motors have been exposed to 89 degrees F.

> So I must fly them at no warmer then 14 degrees ? Burrrrr......

> > Aerotech motors can sometimes develop a crust on the exposed propellant
> surface. A
> > seriously dipped Magnelite will burn through the crust - just make sure it
> is dipped the
> > entire length of the core with ignition starting at the top.

> > -Fred Shecter NAR 20117

> http://cgi6.ebay.com/ws/eBayISAPI.dll?ViewSellersOtherItems&userid=sh...
> > --
> > """Remove "zorch" from address (2 places) to reply.


> > > I have some Aerotech AP reloads (nothing over "F") that are about 8
> years
> > > old.
> > > Junk?
> > > I may donate them to the local Tripoli club in San Diego if they are
> still
> > > useable.
> > > Also a bunch of estes BP engines which I'll probably soak in water.
> > > Dave B.

 
 
 

shelf life of AP motors

Post by DJ Delori » Sat, 26 Jun 2004 11:58:54


Quote:

> Reading comprehension:

It's hard to properly comprehend someone who can't speak
unambiguously.

Quote:
> If I say to put a shelf less than 75 centimeters below the ceiling,
> you will put it between zero and 75 centimeters below and no more
> than 75 centimeters below.

People have different expectations about resolving ambiguities when
talking about height than about temperature.

Quote:
> Now re-read what I said about the temperature.

You said "less than ..." which sounds like you meant "colder than
...".  You should have said "no colder than ..." or "warmer than".

It's like turning the freezer up.  Is it colder (more freezing) or
warmer (more degrees) now?

Quote:
> > > you should fire them at a temperature less than 75 degrees F
> > > below the highest temperature they ever experienced).

Did you mean "(less than 75 degrees F) below the highest temperature"
or "less than (75 degrees F below the highest temperature)" ?  It's
ambiguous.
 
 
 

shelf life of AP motors

Post by Jerry Irvin » Sat, 26 Jun 2004 12:02:51




Quote:

> > Reading comprehension:

> It's hard to properly comprehend someone who can't speak
> unambiguously.

ROFL

Quote:

> > If I say to put a shelf less than 75 centimeters below the ceiling,
> > you will put it between zero and 75 centimeters below and no more
> > than 75 centimeters below.

> People have different expectations about resolving ambiguities when
> talking about height than about temperature.

> > Now re-read what I said about the temperature.

> You said "less than ..." which sounds like you meant "colder than
> ...".  You should have said "no colder than ..." or "warmer than".

> It's like turning the freezer up.  Is it colder (more freezing) or
> warmer (more degrees) now?

> > > > you should fire them at a temperature less than 75 degrees F
> > > > below the highest temperature they ever experienced).

> Did you mean "(less than 75 degrees F) below the highest temperature"
> or "less than (75 degrees F below the highest temperature)" ?  It's
> ambiguous.

--
Jerry Irvine, Box 1242, Claremont, California 91711 USA

Please bring common sense back to rocketry administration.
Produce then publish.  http://www.usrockets.com
My articles valuable? Donate http://tinyurl.com/2hmgv
 
 
 

shelf life of AP motors

Post by Fred » Mon, 28 Jun 2004 06:12:52


I have some Composite Dynamics motors from the early 80's.
I think I'll bring them to BALLS and sell them as antiques. :-)


Quote:
> << I have some Aerotech AP reloads (nothing over "F") that are about 8
years
> old. Junk?>>

> They should be fine, as long as they've been stored reasonably well. (No
water
> damage, etc.) The grains may have developed some white crust or spots, but
that
> won't affect use. Just brush it out of the core so it won't interfere with
> ignition.

> << Also a bunch of estes BP engines which I'll probably soak in water. >>

> These too should be useable unless water damaged or exposed to excessive
> variation of temperature. If you don't want 'em, donate them to someone.

 
 
 

shelf life of AP motors

Post by alma » Mon, 28 Jun 2004 09:58:51



Quote:
> Reading comprehension:

If I had been interested in an english major, I would never have become
interested in the persuit of science.

Quote:

> If I say to put a shelf less than 75 centimeters below the ceiling, you
will put it
> between zero and 75 centimeters below and no more than 75 centimeters
below.

> Now re-read what I said about the temperature.

I did, and it's err, am-big-you-is.

Quote:
> :-)

> --
> -Fred Shecter
> Auctions:

http://cgi6.ebay.com/ws/eBayISAPI.dll?ViewSellersOtherItems&include=0...
Quote:

> To reply by e-mail, remove zorch two places.




message

> > > Estes motors (BP) can last FOREVER if stored properly (no extreme
> > temperature cycles - and
> > > you should fire them at a temperature less than 75 degrees F below the
> > highest temperature
> > > they ever experienced).

> > he he.. My Estes motors have been exposed to 89 degrees F.

> > So I must fly them at no warmer then 14 degrees ? Burrrrr......

> > > Aerotech motors can sometimes develop a crust on the exposed
propellant
> > surface. A
> > > seriously dipped Magnelite will burn through the crust - just make
sure it
> > is dipped the
> > > entire length of the core with ignition starting at the top.

> > > -Fred Shecter NAR 20117

http://cgi6.ebay.com/ws/eBayISAPI.dll?ViewSellersOtherItems&userid=sh...

- Show quoted text -

Quote:
> > > --
> > > """Remove "zorch" from address (2 places) to reply.


> > > > I have some Aerotech AP reloads (nothing over "F") that are about 8
> > years
> > > > old.
> > > > Junk?
> > > > I may donate them to the local Tripoli club in San Diego if they are
> > still
> > > > useable.
> > > > Also a bunch of estes BP engines which I'll probably soak in water.
> > > > Dave B.

 
 
 

shelf life of AP motors

Post by ttumpa1.. » Sun, 01 Jul 2012 16:27:14


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shelf life of AP motors

Post by ttumpa1.. » Sun, 01 Jul 2012 16:28:15


Serving those who need it most! Anytime Restoration is a family operated company built on strong principles that makes recovering from a disaster the least intrusive as possible. We specialize in Water Damage Restoration Service.
http://www.anytimerestorationservices.com