I think you need to fly that one. But take some young eyes with you. Lots of them

Seriously, I fully expect Estes to roll out 2 new stagers to use that motor. An uprated EE Express would be perfect.

In my mind, the BT-55 gives it just the right mix of high performance while still being recoverable (versus a minimum diameter bird, for example).

Anyway, if I'm Estes, for stagers for these new motors, I'm thinking EE Express, Omega-E and maybe a BT-55 upscale Delta Star. Plus, for single stage birds, a Cherokee-E would be awesome (I need to build one of those anyway. In my naivete all those years ago when I cloned mine, I put a motor block in it and thus don't fly it on any motors longer than 70mm.)

Doug

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YORF member #11

This is the best news to come out of Estes in a LONG time. Would have rather had like an E20 to E24 also, but this is a START.
Does anyone know if they will be keeping the E9 in the line too or is this a replacement ?

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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, and HAVOC !

The retailers will likely make that decision for them. If they're unwilling to add the extra peg hooks, I could see them putting the E12's on the shelves in place of the E9's. But that's only speculation. We'll see how it actually plays out.

Doug

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YORF member #11

Me want Omega-E !!!!!!!!

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-Fred Shecter NAR 20117 (L2)
Southern California Rocket Association, NAR Section 430

I just worked up a BT-60 size version with really nice flight numbers (sweet, low Dv numbers - below 7 FPS) on the E12-6. It's not half bad on the D12-5, either, just high on the Dv.

It will be posted in the BARCLONE area...

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Craig McGraw

BARCLONE Rocketry -- http://barclone.rocketshoppe.com
BARCLONE Blogsite -- http://barclone.wordpress.com
BARCLONE Forum -- BARCLONE Forum

BARs helping BARs

SAM 0044
AMA 352635

Here is a 2 stage run E12-E12 in a stock minimum diameter rocket from U.S. Rockets.

Tandem Goodness

Summary:

Lengths: 32/28"
CDr's: 0.65/0.45 cd
Stage 1 mass: 140+60+60 = 0.574#
Stage 2 mass: 120+60 = 0.397#
BOA+0.20s 448 ft
BOV+0.20s 269 fps

SUMMARY TABLE: E12-E12
LIFT-OFF WEIGHT -LBS = 0.3975
MAX ALTITUDE -FT = 4101.2
MAX ALTITUDE -MILES = 0.7817
MAX MACH NUMBER = 0.5842
MAX VELOCITY -FT/SEC = 605.11
MAX VELOCITY -MPH = 412.58
BURNOUT VELOCITY -FT/SEC= 598.27
BURNOUT ALTITUDE -FT = 1594.89
MAX ACCELERATION -G'S = 17.14
COAST TIME -SEC = 11.05

4101 feet with no piston launcher on the booster stage.

Attached is the detailed rtf file.

Tech Jerry

Attached Files

E12-E12.txt (24.5 KB, 47 views)

Bill has a very interesting point.

The E12 would be a "more generally useful" motor than the E9. Less chance of it being put in the "wrong" rocket.

It couldn't hurt to buy a few extra packs of E9s . . .

Hmmm, could an upscaled Comanche be called the "EEE! Express?"

Comanch-E 3

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-Fred Shecter NAR 20117 (L2)
Southern California Rocket Association, NAR Section 430

Comanch-E BYE-BYE

NO need to upscale, just stretch the booster lengths.

Seriously, though, would a stack of 3 x E12 ( or E12 / E12 / E9 ) boost fast enough ? don;t have a rocksim file here to try to play with, but might be alil slow off the pad due to the extra weight ?
When we used to fly the 5 stage rack rockets, ( 5 x D12's ) . a DE12 was not a good boost motor, but a D20 to 4 x D12's worked nice. got it moving.

As for Commanche 3 - lost mine on D12-0 to old Aerotech E10-0 ( direct staged ),direct staged to a D12-7 ... tipped off some and bye bye birdie......

~ AL