Question on 0 delay estes motors......?????

Question on 0 delay estes motors......?????

Post by Ro » Sun, 02 Feb 2003 13:05:05



Even though it looks like black propellent in the forward end of a C6-0
or D12-0.   Is there some gunpowder mixed in for an ejection charge?
     Does estes make an E9-0?
Can an E9 estes motor be altered to be a 0 delay so it can be used as a
booster engine? ty Ron
 
 
 

Question on 0 delay estes motors......?????

Post by David Weinshenke » Sun, 02 Feb 2003 13:23:23


Quote:

> Even though it looks like black propellent in the forward end of a C6-0
> or D12-0.   Is there some gunpowder mixed in for an ejection charge?

That's the front end of the propellant grain - there's nothing else in a
"-0" motor. When the propellant gets near the end, the pressure inside the
motor blows out the front with a puff of hot particles and gas to ignite the
upper stage.

Quote:
> Does estes make an E9-0?

There was one announced and certified, but it's not clear that it's seen
actual production...

Quote:
> Can an E9 estes motor be altered to be a 0 delay so it can be used as a
> booster engine?

This is not recommended - the delay element cannot safely and easily be removed
from a black powder motor.

-dave w

 
 
 

Question on 0 delay estes motors......?????

Post by Ro » Sun, 02 Feb 2003 13:45:22


I made a two stage Sam CCCP upscale with two E9 motors...    I drilled
out the powder and delay charge like I thought .... right down to the
black propellent.   It failed to ignite the upper E9 that it was taped
right to. The upper motor was blackened but did not ignite.
CRASH....lol   I'll try it again...   It had a beautiful slow and long
flight and I was looking forward to the second stage flight when it
failed.   darn.... Ron
 
 
 

Question on 0 delay estes motors......?????

Post by Tom Binfor » Sun, 02 Feb 2003 16:07:46


You removed the clay cap and ejection charge - not the delay. The delay and
propellant look the same in an Estes motor.

Tom


Quote:
> I made a two stage Sam CCCP upscale with two E9 motors...    I drilled
> out the powder and delay charge like I thought .... right down to the
> black propellent.   It failed to ignite the upper E9 that it was taped
> right to. The upper motor was blackened but did not ignite.
> CRASH....lol   I'll try it again...   It had a beautiful slow and long
> flight and I was looking forward to the second stage flight when it
> failed.   darn.... Ron

 
 
 

Question on 0 delay estes motors......?????

Post by Ro » Sun, 02 Feb 2003 16:14:30


Actually.... the delay charge in an Estes engine is gray.... not black.
I do know what I removed....lol    I'll try again....ty  Ron
 
 
 

Question on 0 delay estes motors......?????

Post by Jerry Irvin » Sun, 02 Feb 2003 22:52:41



Quote:

> Actually.... the delay charge in an Estes engine is gray.... not black.
> I do know what I removed....lol    I'll try again....ty  Ron

Don't tell anyone but you can safely (based only on others' experience
of course ...) dril an Estes delay with a 3/32" bit.

Jerry

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

Please bring common sense back to rocketry administration.
Produce then publish.  http://www.usrockets.com

 
 
 

Question on 0 delay estes motors......?????

Post by Doug Sam » Sun, 02 Feb 2003 23:11:40


Quote:

> Actually.... the delay charge in an
> Estes engine is gray.... not black.
> I do know what I removed....lol    
> I'll try again....ty  Ron

Sounds like your "booster" motor was fine,
but that your sustainer motor might have
been the problem.

I always inspect the nozzle to ensure there
is no clay residue from the manufacturing
process. In fact, I've seen what appear to
be perfectly clean motors not light, so
I've begun scraping out all sustainer
motors, and that seems to do the trick.
I haven't had a failure since, and that
includes both gap staging and
tape-together staging.  

I prefer to use the biggest drill bit
which will fit thru the opening and then
give it a few twists (by hand) to ensure
the BP is unobstructed by clay.

Regarding your modified booster motor:
I prefer the D12-0.  That avoids the
hassle.

HTH,
Doug

--
doug dot sams at flash dot net

 
 
 

Question on 0 delay estes motors......?????

Post by Dale Gree » Mon, 03 Feb 2003 01:43:08


Quote:

> I made a two stage Sam CCCP upscale with two E9 motors...    I drilled
> out the powder and delay charge like I thought .... right down to the
> black propellent.  Ron

You DRILLED it out!!! have you heard of the word friction?  you might
be hearing the word KABOOM!! This is exactly why the safety code
prohibits modifying motors. Spend a few bucks and use electronic
ignition of the upper stage - in the long run it will save on
fingers!!

Dale Greene
SPAAR 503
www.spaar.org

 
 
 

Question on 0 delay estes motors......?????

Post by Jerry Irvin » Mon, 03 Feb 2003 01:49:24




Quote:


> > I made a two stage Sam CCCP upscale with two E9 motors...    I drilled
> > out the powder and delay charge like I thought .... right down to the
> > black propellent.  Ron

> You DRILLED it out!!! have you heard of the word friction?

Estes Drilled B14 motors FTR.

Jerry

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

Please bring common sense back to rocketry administration.
Produce then publish.  http://www.usrockets.com

 
 
 

Question on 0 delay estes motors......?????

Post by Ro » Mon, 03 Feb 2003 02:30:26


by hand... not power drill....