I can easily use the E12 as the core engine for my K-36 Estes Saturn - V, along with four 18 mm outboards (C6's, perhaps the long burning Quest motors).

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Dave, NAR # 21853 SR.

Take boost photos from underneath!

Nice!! I know that will work!

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Dave, NAR # 21853 SR.

Flew the Vagabond once on Saturday on an E12-6. Rather more urgent boost than with an E9 with a 30% or so higher top speed (as reported by an AltimeterTwo aboard). Peak altitude in the same general ballpark (1150 feet or so). Nice.

The Ventris also flew on an F50 and a CTI G88 Smoky Sam. Both were lovely flights.

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

Yes they were! Lovely indeed! Especially the G88. That rocket was moving

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Derek McGuckin
Tri-Cities Rocketeers
www.tricitiesrocketeers.org

Flew our Maxi Alpha 3 on a E12-6 today, great initial boost! This motor should get my Saturn V up there nicely based on how it performed today.

Posted a vid of the flight up on my youtube page.

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Fleet : http://s84.photobucket.com/albums/k...Rocket%20Fleet/

http://youtube.com/swillie

Anybody used an E-12 in a SatV? How would one change the build (mine is not started yet...)to be able to use one?

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Rocketeer 1968-1975
BAR 2008-
NAR# 91623, SAM# 0425

The simple way for a previously built rocket would be to mark the Saturn's CG with a D12-3 inserted and recovery system installed, ready to fly. Then insert the E12 and let it hang out the back of the motor mount a little. Tape it so it won't eject itself. Now add nose weight until it balances in the same place.

Since you haven't started your build, you could just put the thrust ring deeper and sub in the longer motor hook. Stick a spacer in and prep to fly with the D12-3. Mark the CG, and then insert the E12 and add weight like I previously mentioned.

I personally won't be using them in a Saturn until they've been on the market a while and I can get a feel for their reliability. There's already been a few reports of failures.

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I love sanding.

Ok, the nose weight issue is what I was wondering about. If I understand you right, you are saying that after construction using a longer engine mount, one should check where the CG (balance point, right?) is when a D12-3 is at rear end of the engine hook, and then add nose weight to make get to the same CG when a E12 is on board, correct?

Thanks!

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Rocketeer 1968-1975
BAR 2008-
NAR# 91623, SAM# 0425

Yes. It's designed to be stable with a D12-3. Prep it properly with a D12-3 and find the balance point. Then add nose weight to balance in the same spot with the E12. If you plan to fly on D12's too, you will probably want to make the extra weight removable.

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I love sanding.