Motor Manufacturer endorses delay cutting!

Motor Manufacturer endorses delay cutting!

Post by RocketStuf » Wed, 14 Jun 2000 04:00:00



Everyone,

    I know this will probably rehash the delay cutting argument again,
but this is worthy of reading.  Straight from an ROL article on the new
BlackSky motors:

"Another key feature is the Delay Adjustment Tool. All delays
delivered are long, and the tool is used to shorten the delay"

The complete article comes to us courtesy of Darrell at ROL and can be
found at:

http://www.rocketryonline.com/Search/db_search.cgi?setup_file=News&submi
t_search=yes&db_id=372

Philip

Sent via Deja.com http://www.deja.com/
Before you buy.

 
 
 

Motor Manufacturer endorses delay cutting!

Post by Andy En » Wed, 14 Jun 2000 04:00:00


Quote:

>>"Another key feature is the Delay Adjustment Tool. All delays
>>delivered are long, and the tool is used to shorten the delay"

>Oh boy. Take cover. Here it comes.......

>Bill Rossi

Thumbs up...

Andy Eng

* Sent from RemarQ http://www.remarq.com The Internet's Discussion Network *
The fastest and easiest way to search and participate in Usenet - Free!

 
 
 

Motor Manufacturer endorses delay cutting!

Post by BULLPU » Thu, 15 Jun 2000 04:00:00


Quote:
>"Another key feature is the Delay Adjustment Tool. All delays
>delivered are long, and the tool is used to shorten the delay"

Oh boy. Take cover. Here it comes.......

Bill Rossi
             \\\///
           (O)(O)  
--oOO----(__)--------------
: I WILL WORK FOR :
: ROCKET MOTORS :
:-------------------oOO-----:
          |__|   |__|
           |~|    |~|  
          ooO  Ooo    http://members.aol.com/BULLPUPP/index.html

 
 
 

Motor Manufacturer endorses delay cutting!

Post by Dave Johnsto » Thu, 15 Jun 2000 04:00:00


I was looking at the tool, casings and reloads and witnessed a bunch of great launches with the new motors this past weekend. It
sure looks like a promising new line. They produce a nice crisp roar and they have great tracking smoke. It will my 38mm line of
choice, as long as availability is reasonable. You can rebuild rather quickly as it is a matter of coring the delay to your desired
setting and screwing the reload into the casing. No o-rings, no multi parts to mix up, no muss, no fuss.
This comes with the usual disclaimers, I am not associated, affiliated or have no interest in the manufacturer or any
distributorship, I will receive no compensation for my testimonial, and all statements are opinions of my own.
I just want to burn a bunch of them.
Dave Johnston
CAR #S382
Quote:

>"Another key feature is the Delay Adjustment Tool. All delays
>delivered are long, and the tool is used to shorten the delay"

>Philip

 
 
 

Motor Manufacturer endorses delay cutting!

Post by Dav » Thu, 15 Jun 2000 04:00:00


Quote:

>Everyone,

>    I know this will probably rehash the delay cutting argument again,
>but this is worthy of reading.  Straight from an ROL article on the new
>BlackSky motors:

>"Another key feature is the Delay Adjustment Tool. All delays
>delivered are long, and the tool is used to shorten the delay"

Unfortunately, I don't have my copy of the Tripoli High Power Safety Code
(NFPA 1127) in front of me, but in the abbreviated version of the Safety
Code on the Tripoli web page it says this:

4.II. Do not dismantle, reload, or alter a disposable or expendable high
power rocket motor, not alter the components of a reloadable high power
rocket motor or use the contents of a reloadable rocket motor reloading kit
for a purpose other than that specified by the manufacture in the rocket
motor or reloading kit instructions.

My interpretation of this is, since the delay modification is okayed by the
mfr, it's not a violation of the Safety Code. I'm open to correction if I'm
wrong.

Dave

 
 
 

Motor Manufacturer endorses delay cutting!

Post by Ned Nassi » Thu, 15 Jun 2000 04:00:00


I'd like to hear what Sue has to say on this.  If the motor is tested and
TMT approved as designed this should be a non issue.  Sue?

Ned

___________________________________________________________________
"I made a factual statement and you did not.  Are you seeking the patent on
stupid posts?" Jerry Irvine


Quote:


> >Everyone,

> >    I know this will probably rehash the delay cutting argument again,
> >but this is worthy of reading.  Straight from an ROL article on the new
> >BlackSky motors:

> >"Another key feature is the Delay Adjustment Tool. All delays
> >delivered are long, and the tool is used to shorten the delay"

> Unfortunately, I don't have my copy of the Tripoli High Power Safety Code
> (NFPA 1127) in front of me, but in the abbreviated version of the Safety
> Code on the Tripoli web page it says this:

> 4.II. Do not dismantle, reload, or alter a disposable or expendable high
> power rocket motor, not alter the components of a reloadable high power
> rocket motor or use the contents of a reloadable rocket motor reloading
kit
> for a purpose other than that specified by the manufacture in the rocket
> motor or reloading kit instructions.

> My interpretation of this is, since the delay modification is okayed by
the
> mfr, it's not a violation of the Safety Code. I'm open to correction if
I'm
> wrong.

> Dave

 
 
 

Motor Manufacturer endorses delay cutting!

Post by daz.. » Fri, 16 Jun 2000 04:00:00


Quote:

> I'd like to hear what Sue has to say on this.  If the motor is tested
> and TMT approved as designed this should be a non issue.  Sue?

Don't bother her - she's busy testin' em! 6 motor sizes x 5 delays
x 3 samples per motor/delay combination = 90 static test shots.

She posted to this question a bit earlier today/late yesterday, I
think - she's done the G's so far, IIRC.

-dave w

Sent via Deja.com http://www.deja.com/
Before you buy.

 
 
 

Motor Manufacturer endorses delay cutting!

Post by Sue McMurra » Sat, 17 Jun 2000 04:00:00


Quote:

> I'd like to hear what Sue has to say on this.  If the motor is tested and
> TMT approved as designed this should be a non issue.  Sue?

Is non issue (tested and approved as designed and per manufacturer's
instructions). Sue :)
 
 
 

Motor Manufacturer endorses delay cutting!

Post by Lewis Garro » Sat, 17 Jun 2000 04:00:00


so this 'loophole' is open to aerotech as well...they just need to supply
instructions on how to cut their delays down to make it 'legal' to alter the
delay as manufactured? and supply a tool (exacto blade) with which to do it?
Quote:


> > I'd like to hear what Sue has to say on this.  If the motor is tested and
> > TMT approved as designed this should be a non issue.  Sue?

> Is non issue (tested and approved as designed and per manufacturer's
> instructions). Sue :)

 
 
 

Motor Manufacturer endorses delay cutting!

Post by Group 74 » Sat, 17 Jun 2000 04:00:00


NO!   Because the length of the delay (old style) is integeral to the
pressurization of the motor.  They cannot be trimmed with an exacto.  I
have no experience with the new style.

Steve

Quote:

> so this 'loophole' is open to aerotech as well...they just need to supply
> instructions on how to cut their delays down to make it 'legal' to alter the
> delay as manufactured? and supply a tool (exacto blade) with which to do it?



> > > I'd like to hear what Sue has to say on this.  If the motor is tested and
> > > TMT approved as designed this should be a non issue.  Sue?

> > Is non issue (tested and approved as designed and per manufacturer's
> > instructions). Sue :)

 
 
 

Motor Manufacturer endorses delay cutting!

Post by John Stei » Sat, 17 Jun 2000 04:00:00


But Aerotech would have to submit motors for testing using this method
before they could be certified for our use, right?

--
John Stein   KC4RLL
NAR #74335  SR  Ins  L1
S.E.A.R.S. #572

Quote:

>so this 'loophole' is open to aerotech as well...they just need to supply
>instructions on how to cut their delays down to make it 'legal' to alter
the
>delay as manufactured? and supply a tool (exacto blade) with which to do
it?



>> > I'd like to hear what Sue has to say on this.  If the motor is tested
and
>> > TMT approved as designed this should be a non issue.  Sue?

>> Is non issue (tested and approved as designed and per manufacturer's
>> instructions). Sue :)