Motor Delay Questions

Motor Delay Questions

Post by MODROCK » Mon, 18 Oct 2004 06:51:34



I have two high power motor delay questions. First, is the 29mm med delay
interchangeable with the 38mm motors? The only difference that I can see is
that the delay spacer for the 29mm motor is slightly smaller. The delay
propellant looks to be the same quantity.

Second, in using an altimeter based deployment system, what parts of the reload
motor can be left out? It seems as if I heard or read somewhere that you can
simply fill the forward closure with grease and leave out all the elements that
would normally be used (e.g., delay element, spacer, delay case, and forward
"O" ring). If this is the case, what stops the igniter at the end of the
propellant grains?

Thanks in advance for your wisdom and advice.
Joe A.
South Louisiana Rocketry #8
NAR #73346
Level 1

 
 
 

Motor Delay Questions

Post by Darren J Longhor » Mon, 18 Oct 2004 07:06:32



Quote:
>I have two high power motor delay questions. First, is the 29mm med delay
>interchangeable with the 38mm motors? The only difference that I can see is
>that the delay spacer for the 29mm motor is slightly smaller. The delay
>propellant looks to be the same quantity.

Aerotech? Don't think so.

Quote:
>Second, in using an altimeter based deployment system, what parts of the reload
>motor can be left out? It seems as if I heard or read somewhere that you can
>simply fill the forward closure with grease and leave out all the elements that
>would normally be used (e.g., delay element, spacer, delay case, and forward
>"O" ring). If this is the case, what stops the igniter at the end of the
>propellant grains?

Build the delay assembly as normal, omit the BP and fill the well with
wadding. Or get a plugged forward closure.
--
Darren J Longhorn  http://www.geocities.com/darrenlonghorn/
NSRG #005          http://www.northstarrocketry.org.uk/
UKRA #1094 L2 RSO  http://www.ukra.org.uk/

 
 
 

Motor Delay Questions

Post by Phil Stei » Mon, 18 Oct 2004 07:08:58



Quote:
>I have two high power motor delay questions. First, is the 29mm med delay
>interchangeable with the 38mm motors? The only difference that I can see is
>that the delay spacer for the 29mm motor is slightly smaller. The delay
>propellant looks to be the same quantity.

Check AT's web site. http://www.aerotech-rocketry.com  for the
specific ines you are looking for.  If they use different propellant
there is a very good chance they are not interchangable.

Quote:
>Second, in using an altimeter based deployment system, what parts of the reload
>motor can be left out? It seems as if I heard or read somewhere that you can
>simply fill the forward closure with grease and leave out all the elements that
>would normally be used (e.g., delay element, spacer, delay case, and forward
>"O" ring). If this is the case, what stops the igniter at the end of the
>propellant grains?

THe best thing to do is to get a plugged closure.  Next best is to
assemble per the instructions and leave out the black powder.  The
delay element os an important part of keeping in the pressure & making
the gasses exit out the bottom.  If you replace it with grease I think
when the motor comes up to pressure, first it'll squirt the grease out
of the fwd closure then,  followed by hot gasses & flames.  The
results would be pretty much like blow by.
Quote:
>Thanks in advance for your wisdom and advice.
>Joe A.
>South Louisiana Rocketry #8
>NAR #73346
>Level 1

 
 
 

Motor Delay Questions

Post by Jerry Irvin » Mon, 18 Oct 2004 07:18:56



Quote:

> I have two high power motor delay questions. First, is the 29mm med delay
> interchangeable with the 38mm motors?

NO.

Quote:
> The only difference that I can see is
> that the delay spacer for the 29mm motor is slightly smaller. The delay
> propellant looks to be the same quantity.

Delay length is specific to motor diameter and propellant type.

Quote:

> Second, in using an altimeter based deployment system, what parts of the
> reload
> motor can be left out? It seems as if I heard or read somewhere that you can
> simply fill the forward closure with grease and leave out all the elements
> that

Usually it is best to install the delay as an assured pressure seal and
simply leave out the ejection powder. Be sure the gas discharge from the
top of the motor does not result in separation unintended.

Quote:
> would normally be used (e.g., delay element, spacer, delay case, and forward
> "O" ring). If this is the case, what stops the igniter at the end of the
> propellant grains?

> Thanks in advance for your wisdom and advice.
> Joe A.
> South Louisiana Rocketry #8
> NAR #73346
> Level 1

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

Please bring common sense back to rocketry administration.
Produce then publish.  http://www.usrockets.com
Ebay auction deals and specials. http://tinyurl.com/6wlp8
 
 
 

Motor Delay Questions

Post by tater schul » Mon, 18 Oct 2004 08:27:43


an on-topic, informational, and non-bashing post.

no wonder you are not on my killfile :)

--
Tater
President of MARS Club (NAR #660)
www.mars-rocketry.com
KC9ESF
NAR #79654 L1
AMA #747769
EAA #703312
remove spam spelled backwards to reply


Quote:


> > I have two high power motor delay questions. First, is the 29mm med
delay
> > interchangeable with the 38mm motors?

> NO.

> > The only difference that I can see is
> > that the delay spacer for the 29mm motor is slightly smaller. The delay
> > propellant looks to be the same quantity.

> Delay length is specific to motor diameter and propellant type.

> > Second, in using an altimeter based deployment system, what parts of the
> > reload
> > motor can be left out? It seems as if I heard or read somewhere that you
can
> > simply fill the forward closure with grease and leave out all the
elements
> > that

> Usually it is best to install the delay as an assured pressure seal and
> simply leave out the ejection powder. Be sure the gas discharge from the
> top of the motor does not result in separation unintended.

> > would normally be used (e.g., delay element, spacer, delay case, and
forward
> > "O" ring). If this is the case, what stops the igniter at the end of the
> > propellant grains?

> > Thanks in advance for your wisdom and advice.
> > Joe A.
> > South Louisiana Rocketry #8
> > NAR #73346
> > Level 1

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

> Please bring common sense back to rocketry administration.
> Produce then publish.  http://www.usrockets.com
> Ebay auction deals and specials. http://tinyurl.com/6wlp8

 
 
 

Motor Delay Questions

Post by Terry Cook » Mon, 18 Oct 2004 08:39:33



Quote:
> an on-topic, informational, and non-bashing post.

> no wonder you are not on my killfile :)

> --
> Tater
> President of MARS Club (NAR #660)
> www.mars-rocketry.com
> KC9ESF
> NAR #79654 L1
> AMA #747769
> EAA #703312
> remove spam spelled backwards to reply

Tater! Shush! Don't wake the trolls. Terry
 
 
 

Motor Delay Questions

Post by Jerry Irvin » Mon, 18 Oct 2004 08:54:02




Quote:
> an on-topic, informational, and non-bashing post.

> no wonder you are not on my killfile :)

I'm sorry!!

Quote:

> --
> Tater
> President of MARS Club (NAR #660)
> www.mars-rocketry.com
> KC9ESF
> NAR #79654 L1
> AMA #747769
> EAA #703312
> remove spam spelled backwards to reply





> > > I have two high power motor delay questions. First, is the 29mm med
> delay
> > > interchangeable with the 38mm motors?

> > NO.

> > > The only difference that I can see is
> > > that the delay spacer for the 29mm motor is slightly smaller. The delay
> > > propellant looks to be the same quantity.

> > Delay length is specific to motor diameter and propellant type.

> > > Second, in using an altimeter based deployment system, what parts of the
> > > reload
> > > motor can be left out? It seems as if I heard or read somewhere that you
> can
> > > simply fill the forward closure with grease and leave out all the
> elements
> > > that

> > Usually it is best to install the delay as an assured pressure seal and
> > simply leave out the ejection powder. Be sure the gas discharge from the
> > top of the motor does not result in separation unintended.

> > > would normally be used (e.g., delay element, spacer, delay case, and
> forward
> > > "O" ring). If this is the case, what stops the igniter at the end of the
> > > propellant grains?

> > > Thanks in advance for your wisdom and advice.
> > > Joe A.
> > > South Louisiana Rocketry #8
> > > NAR #73346
> > > Level 1

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

Please bring common sense back to rocketry administration.
Produce then publish.  http://www.usrockets.com
Ebay auction deals and specials. http://tinyurl.com/6wlp8
 
 
 

Motor Delay Questions

Post by W. E.Fred Wallac » Mon, 18 Oct 2004 10:08:27


Quote:



> > an on-topic, informational, and non-bashing post.

> > no wonder you are not on my killfile :)

> > --
> > Tater

> Tater! Shush! Don't wake the trolls. Terry

When reasonable and useful content is posted by jerry, trolling is
seldom the result. BTW, what is your excuse for trolling??(;-)

Fred

 
 
 

Motor Delay Questions

Post by Jerry Irvin » Mon, 18 Oct 2004 10:31:37




Quote:



> > > an on-topic, informational, and non-bashing post.

> > > no wonder you are not on my killfile :)

> > > --
> > > Tater

> > Tater! Shush! Don't wake the trolls. Terry

> When reasonable and useful content is posted by jerry, trolling is
> seldom the result. BTW, what is your excuse for trolling??(;-)

> Fred

Fred simply cnnot resist.

He is invoked by ANYONE mentioning trolls of course.

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

Please bring common sense back to rocketry administration.
Produce then publish.  http://www.usrockets.com
Ebay auction deals and specials. http://tinyurl.com/6wlp8

 
 
 

Motor Delay Questions

Post by W. E.Fred Wallac » Mon, 18 Oct 2004 10:48:40


Quote:






> > > > an on-topic, informational, and non-bashing post.

> > > > no wonder you are not on my killfile :)

> > > > --
> > > > Tater

> > > Tater! Shush! Don't wake the trolls. Terry

> > When reasonable and useful content is posted by jerry, trolling is
> > seldom the result. BTW, what is your excuse for trolling??(;-)

> > Fred

> Fred simply cnnot resist.

> He is invoked by ANYONE mentioning trolls of course.

> --
> Jerry

What is your excuse?? You have a 10 plus year history..
 
 
 

Motor Delay Questions

Post by Jerry Irvin » Mon, 18 Oct 2004 11:32:05




Quote:






> > > > > an on-topic, informational, and non-bashing post.

> > > > > no wonder you are not on my killfile :)

> > > > > --
> > > > > Tater

> > > > Tater! Shush! Don't wake the trolls. Terry

> > > When reasonable and useful content is posted by jerry, trolling is
> > > seldom the result. BTW, what is your excuse for trolling??(;-)

> > > Fred

> > Fred simply cnnot resist.

> > He is invoked by ANYONE mentioning trolls of course.

> > --
> > Jerry

> What is your excuse??

I don't have, or need, an excuse for posting content, some political.

Quote:
> You have a 10 plus year history..

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

Please bring common sense back to rocketry administration.
Produce then publish.  http://www.usrockets.com
Ebay auction deals and specials. http://tinyurl.com/6wlp8
 
 
 

Motor Delay Questions

Post by W. E.Fred Wallac » Mon, 18 Oct 2004 19:47:19


Quote:









> > > > > > an on-topic, informational, and non-bashing post.

> > > > > > no wonder you are not on my killfile :)

> > > > > > --
> > > > > > Tater

> > > > > Tater! Shush! Don't wake the trolls. Terry

> > > > When reasonable and useful content is posted by jerry, trolling is
> > > > seldom the result. BTW, what is your excuse for trolling??(;-)

> > > > Fred

> > > Fred simply cnnot resist.

> > > He is invoked by ANYONE mentioning trolls of course.

> > > --
> > > Jerry

> > What is your excuse??

> I don't have, or need, an excuse for posting content, some political.

> Jerry

Yes jerry, I agree; if you that was the limit to your postings.
However, your constant whining and  disparaging remarks to, and
about, individuals and groups, over shadow most of your contributed,
usable, content.

Oh well, time to get ready for today's launch. Time to just fly
rockets.. You can carry on jerry, I'm sure everyone is just holding
their breath, for your next bit of wisdom.

Fred

 
 
 

Motor Delay Questions

Post by Phil Stei » Mon, 18 Oct 2004 22:05:29




Quote:





>> > > an on-topic, informational, and non-bashing post.

>> > > no wonder you are not on my killfile :)

>> > > --
>> > > Tater

>> > Tater! Shush! Don't wake the trolls. Terry

>> When reasonable and useful content is posted by jerry, trolling is
>> seldom the result. BTW, what is your excuse for trolling??(;-)

>> Fred

>Fred simply cnnot resist.

>He is invoked by ANYONE mentioning trolls of course.

So of course you have to escelate it & I have to comment on your
comment.
 
 
 

Motor Delay Questions

Post by Phil Stei » Mon, 18 Oct 2004 22:11:05




Quote:








>> > > > > an on-topic, informational, and non-bashing post.

>> > > > > no wonder you are not on my killfile :)

>> > > > > --
>> > > > > Tater

>> > > > Tater! Shush! Don't wake the trolls. Terry

>> > > When reasonable and useful content is posted by jerry, trolling is
>> > > seldom the result. BTW, what is your excuse for trolling??(;-)

>> > > Fred

>> > Fred simply cnnot resist.

>> > He is invoked by ANYONE mentioning trolls of course.

>> > --
>> > Jerry

>> What is your excuse??

>I don't have, or need, an excuse for posting content, some political.

>> You have a 10 plus year history..

True but as courtesyt to other readers, you could post you bullshit in
a seperate thread.  Oh I forgot you have no courtesy toward other
readers.
 
 
 

Motor Delay Questions

Post by Jerry Irvin » Mon, 18 Oct 2004 22:55:22




Quote:
> True but as courtesyt to other readers, you could post you bullshit in
> a seperate thread.  Oh I forgot you have no courtesy toward other
> readers.

I answered the "Motor Delay Questions". You did not.

And now this. Troll.

Jerry



Quote:


> snip

> > I find it interesting that this person has time to count how many
> > times Jerry gets bashed.  Only thing is 68 means nothing unless he
> > specifies over what period of time.  Some people can't do anything
> > right - I admit Jerry is a pioneer in that field.

> Here's some data for you, ***tard.

> Google this:
> http://www.FoundCollection.com/%20Irvine&safe=images&ie=UTF-8...
> p=Rec.models.rockets&as_uauthors=Phil%20Stein&lr=&hl=en

> You have posted some 1,290 posts about Jerry.

> How many of them are actually about the hobby?  Vegas sides on "NONE".

> Get a grip, how pathetic you are that all your enjoyment seems to come
> from abusing Jerry...and no doubt abusing yourself at the same time.
> What a sad, pathetic creature you are that droolingly watches for the
> next Jerry Post so you can get your peanuts off by insulting him.

> What a treasure you are for contibuting so much, so often to RMR.  If
> turds counted that is.

> QM

> Can this be called a love-fest? Agreeing that you don't like me much? :)

Heh, heh...
But now that you mention it... even though I've been told that you are
personally responsible for all misery and pain in this world...
... and even though I've been told that you alone are responsible for all
the damned Vegetables and Fruits on my plate (instead of the bratwurst
and beer that I so love)...
... and even though I've been told that you are actually the Anti-Christ,
and that anyone who converses with you is doomed to suffer in rocket
hell...
... I've personally found you to be informative and innovative... a Man
that has always stood up for his beliefs and principles....and those of
others that SHOULD share your common interests.
Of course, for my beliefs... I fully expect to get beaten up at the next
NAR launch...

If you're looking for Ray, Fred, Phil, or others to get a clue... you'll
probably be disappointed. They have their own agenda... politically
motivated... and has NOTHING to do with increasing our knowledge or
adding to the inherent FUN of this hobby!!!

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

Please bring common sense back to rocketry administration.
Produce then publish.  http://www.FoundCollection.com/
Ebay auction deals and specials. http://www.FoundCollection.com/