That makes sense.

I wonder what happened when they brought back the A8-0 a few years ago - did they have to recert or were they able to just add the booster back into the then-existing A8 certification.

This is a little different from that case in that there’s no C5 currently on the certified motors list, and they’ve been OOP long enough to be completely dropped. It will be interesting to how this works.

And I agree with the others who say they miss the diameter info.

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Bernard Cawley
NAR 89040 L1 - Life Member
SAM 0061
AMA 42160
KG7AIE

Some new and exciting kits to look forward to in 2020!

I think one is named after Leo!

I'm sure he's honored!

I also find not publishing the diameter of each rocket more than a bit perplexing.

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When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, TURMOIL, FIASCOS, and HAVOC !

If you remember, last years initial digital version of the catalog had some things that needed changed before the print version came out so maybe the 2020 print version will have the diameters...

We can hope!!
Some cool looking new kits coming out though.

I miss the diameters. They gave you a feel for the size of the rocket. You need diameters for sims like OpenRocket. Maybe Estes is getting away from the scientific educational aspect. Can't imagine why they would withhold tube diameters from the TARC kids though. Weird.

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-Wolfram v. Kiparski
NAR 28643 - TRA 15520
MTMA Section #606 President

It's been OOP for about 20 years. I would think so, but they might not have to if the laws are worded in a certain way.

The NAR website says that they retest certified motors every five years "to ensure repeatability and help identify creeping degradation in manufacturing or distribution practices." If the 5 year cycle is still active, you'd think they have tested the new batch of C5's regardless of requirement. The published motor data on the NAR site hasn't been updated since 1995 for motors that have been continually produced since then. That's also the date on the C5 data.

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I love sanding.

We all know that there has been "creeping degradation" of the Estes rocket motors. If NAR S&T has really been retesting motors every five years, I wonder why they haven't been sharing the data with the public. Maybe they don't retest the motors.

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-Wolfram v. Kiparski
NAR 28643 - TRA 15520
MTMA Section #606 President

Without a test stand it's conjecture. From what we have heard burn times should be longer but they can maintain the impulse of lowere performing bp by loading more.

I have posted about it through the years, maybe I'll try again as management changes.