D'oh!

Doug

.

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YORF member #11

In case anyone missed it, my description of the Ranger-Bertha family was metaphorical. The family tree wasn't intended to be authoritative.

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SAM # 0011

Metaphorical, but useful. It shows how a single design idea can morph over time to become a "family" of rockets. It all started with a simple design "element", in this case, the fin shape, and has developed into at least three body tube diameters worth of kits.

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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

Yer not doin it right!

A Bertha with a B6-2 or a C6-3 and a keychain cam taped to it is fun, especially with a group of 3rd graders underneath and in the frame.

A Bertha is also the perfect chad stage rocket. D12-0 to A/B/C. Nose weight isn't needed...just let it rip. I've done several D12 to C6 flights just for the heck of it.

The reason I like doing stuff with the Bertha is because it's often a fairly plain to down right ugly rocket, according to how it's finished, and I don't mind banging it up or losing it. And of course, with that mentality, I have never lost a Bertha. That's why I usually use it as my camera platform.

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I love sanding.

Clusters are exciting, no doubt about that. They are even more exciting when one or more of the motors fails to ignite.

Clusters are more complicated to prep as well as being more expensive to launch. So there's a price to pay for all of that drama. Clusters are great; I love them. I can't launch them all the time, though.

Want to make that next Big Bertha launch more riveting? Put a D21 in it.

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SAM # 0011

I still have an old AT 18mm E. If I ever get around to building a Bertha, I might try that.

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John A. Lee O.S.L.
Alamo Rocketeers NAR Section 661
NAR 87285, L1 8 March 2008
TRA 03040, L1 8 March 2008
Photos of the "Fleet": http://www.flickr.com/photos/23694991@N03/

I used to tell Mom, "...I want to fly rockets when I grow up!"

She said, "Make up your mind, you can't do both!"

You'd better fly it at the church youth launch so someone with young legs can retrieve it from way over yonder. (even with the 12" chute)

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I love sanding.

Have done both the keyfob camera and the Aerotech D (though I use the D10s) in my Semroc Vega. I have some videos of D10-powered flights. Haven't tried a camera on the Ranger yet (or flown it on more than B-impulse motors).

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

Actually, I LIKE watching a Bertha go on a single B6 - it has a kind of slow, majestic liftoff that you can actually see as it goes up!

Greg

THAT is one of the biggest differences between my attitude as a kid and now. Back then I shoved in the biggest motor I could find. Recommendations were not considered.

Now I would rather be able to actually see things. I loose interest quickly when I can no longer see.

Another moderating factor these days is if I have a kid from the church to shag for me. Then I figure I ought to use my supply of bigger motors.

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John A. Lee O.S.L.
Alamo Rocketeers NAR Section 661
NAR 87285, L1 8 March 2008
TRA 03040, L1 8 March 2008
Photos of the "Fleet": http://www.flickr.com/photos/23694991@N03/

I used to tell Mom, "...I want to fly rockets when I grow up!"

She said, "Make up your mind, you can't do both!"