Estes E9 (Out of Production?)

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smstachwick

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I've been looking at the Estes website and it appears that all references to the standard single-stage E9 motors that I KNOW they sold at one point have been removed. All I see is the E9-8 (upper stage) and various E12s in the 24mm size, plus the 29mm E16s.

Have the old E9s simply gone out of production or have they been rebranded as E12s?
 

Johnly

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The E9 and the E12 are different motors and each have their own NAR Certification reports.

John Lyngdal
NAR Standards & Testing
 

neil_w

Brain and brain, what is brain!?!
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... and yes, the E9s are out of production, presumably permanently.
 

smstachwick

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Oh wow that was quick! Thanks to both of you.

But now you've got my curiosity up as to the inner workings of the motors. The thrust curve is noticeably different. Did they core out ignition end of the E12s more, or is it a different black powder formulation or what?

Apologies for my noobiness, I'm getting back into serious flying for the first time since I was a kid. I've got a lot to learn, apparently.
 

rklapp

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The E9s were having production problems. From what I heard, the motors made in the winter we’re having Catos so they retooled to the E12. There may be more to the story but that’s all I know.
 

Daddyisabar

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Oh wow that was quick! Thanks to both of you.

But now you've got my curiosity up as to the inner workings of the motors. The thrust curve is noticeably different. Did they core out ignition end of the E12s more, or is it a different black powder formulation or what?

Apologies for my noobiness, I'm getting back into serious flying for the first time since I was a kid. I've got a lot to learn, apparently.
It is a nozzle change. The propellant mix is a trade and ancient Chinese secret!
 

kuririn

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Wow - I’m sad to say I’m old enough to get that reference to what now would be a very culturally insensitive commercial for laundry detergent 🤪
I thought he was talking about spicy chicken.
 

kuririn

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I remember that commercial. What does it have to do with Kung Pao chicken?
 

kuririn

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Got it. I prefer General Tso's chicken myself.
😁
 

Scott_650

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Got it. I prefer General Tso's chicken myself.
😁
I’m all about Hunan - lots of veggies lots of spice! But on the other hand I’ve never had a problem with an E9 motor - though I did have a fast burn-low thrust E12 a few months ago crash my Mean Machine…
 

smstachwick

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I’m all about Hunan - lots of veggies lots of spice! But on the other hand I’ve never had a problem with an E9 motor - though I did have a fast burn-low thrust E12 a few months ago crash my Mean Machine…
At least there’s plenty of body tube to spare.
 

SharkWhisperer

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At least there’s plenty of body tube to spare.
And yet another Mean Machine amputation.

You can cut off a third of the BT length before the official designation changes to "Semi-Nasty Machine". Down to half length? "Kind Machine".
 

kuririn

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And yet another Mean Machine amputation.

You can cut off a third of the BT length before the official designation changes to "Semi-Nasty Machine". Down to half length? "Kind Machine".
Let's hope he doesn't suffer too much additional damage. He might end up with a Wuss Machine.
 

Grog6

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What would an E9 sound like when it cato'ed?
Sounds about like the M-80's I used to get.

I had one det on a 3 stage kit I built.
You know it's bad when you see a dot with lines getting bigger, lol.
It landed where I was standing.
Neither of the upper stages lit, and the rocket was destroyed.
I still have another one of the engines; my evil twin wants to use it for an upper stage of a 3 stager, lol.
 

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