Rocket motor delays explained?

lakeroadster

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The links you provided is the same data discussed in this thread, Dave.

The point is... that data you linked to is not applicable to SU LPR / MPR composites, as we learned from the NAR who stated modifying these delays is a violation of the NAR Safety Code and the drilling of delays is not endorsed by AeroTech.
 
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dhbarr

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If you continue modifying single use LPR / MPR composite motors, you're violating NAR rules and the manufacturers recommendations.
Yes, we got it. Decades of safe practice are now replaced by a hard line. You are right, no one can fly those at NAR anymore.

If we ever want to fly them at NAR again we will need manufacturers to amend their instructions, which they do not seem likely to do. You win.
 

Ez2cDave

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The links you provided is the same data discussed in this thread, Dave. Perhaps take a few minutes and read the rest of the thread before issuing a tongue lashing?

The point is... the data you linked to is not applicable to SU LPR / MPR composites, as we learned from the NAR who stated modifying these delays is a violation of the NAR Safety Code and as we learned from Aerotech who stated on this thread that the drilling is not endorsed by AeroTech.

So, the "800-lb gorilla in the room" . . . Why all this "hand-wringing" ?

Frankly, if this were a problem, NAR would have already addressed it.

No one wants to be the "first man in a bayonet charge", only to suddenly realize that nobody else came with him !
 

lakeroadster

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Yes, we got it. Decades of safe practice are now replaced by a hard line. You are right, no one can fly those at NAR anymore.

If we ever want to fly them at NAR again we will need manufacturers to amend their instructions, which they do not seem likely to do. You win.

We all win. Safety is the goal. Stick to the code.
 

cerving

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The issue is NOT LPR/MPR single-use motors, the issue is modifying the delay on any motor THAT DOES NOT HAVE A MANUFACTURER-APPROVED PROCEDURE FOR DOING SO. Modifying the fixed delay on an Estes BP motor, an AT HL motor, or one of the Q-Jet motors is not approved by the manufacturers, and is therefore outside NAR rules. Not that difficult, guys...
 

Ez2cDave

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The issue is NOT LPR/MPR single-use motors, the issue is modifying the delay on any motor THAT DOES NOT HAVE A MANUFACTURER-APPROVED PROCEDURE FOR DOING SO. Modifying the fixed delay on an Estes BP motor, an AT HL motor, or one of the Q-Jet motors is not approved by the manufacturers, and is therefore outside NAR rules. Not that difficult, guys...

And just how do you propose to monitor that ? Motors could be modded at home or with a drill bit, right on the field.
 

lakeroadster

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The issue is NOT LPR/MPR single-use motors, the issue is modifying the delay on any motor THAT DOES NOT HAVE A MANUFACTURER-APPROVED PROCEDURE FOR DOING SO. Modifying the fixed delay on an Estes BP motor, an AT HL motor, or one of the Q-Jet motors is not approved by the manufacturers, and is therefore outside in violation of NAR rules. Not that difficult, guys...

To clarify... not "outside" the rules, "in violation of" the rules.
 

lakeroadster

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"outside", "in violation of"... same thing. Not allowed.

"Outside" the rules can be interpreted to mean the topic is beyond the scope of the rules, thus the rules don't cover the topic.

"In violation of" the rules means the rules cover the topic, and do not allow it.

Clarity matters.
 
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