Hanna might bring you some, even Gustav might still have some power to get you wet...

Right now, though, I don't like Ike...

We've dodged two bullets in Mobile already, but Ike looks like trouble for us along the Gulf Coast. The projected path right now has us centered in its gunsight...

__________________
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

I hear ya.

About 5 or 6 years ago when a hurricane hit North Carolina, I can't recall the name, many of us in VA lost power for 5 days or more. My basement flooded because I had no power to my sump pump. Wet carpet and moldy drywall are not fun.

However, I consider myself lucky that's all that happened. Be careful down there.

Actually, I think I discovered my problems.
First, it showed I needed a 48" rod, I was only using 36".
The margin with respect to the nose cone looked ok, but compared to the largest diameter was marginal (I found about changing that attribute looking through past posts for this).
I also found if I set the launch conditions to 0 wind it was always stable - I was using what appeared to be a default of 8 ~ 15mph.

I moved some things around. I did change the small "radiator" fin tubes to just 3/8" X 1/8" X 3" fins (qty 12) that helped a lot.

It now always shows stable until I increase winds to the 15 ~ 25 mph setting - which I would not fly under anyway. It will launch OK with a 36" rod, although Rocksim indicates it wants a 42" rod. (It never went unstable with the 36" rod)

Finally, I tried to create the paint scheme (Light blue = silver, yellow = gold). I do plan to bevel the top of the tube fins - something I don't think you can do/show in Rock Sim. The inside of the beveled tube fin will be red.

I've ordered the parts so I should have them mid-week. I'll let you know how it flies.

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EMRR 2008 C.rkt (79.5 KB, 91 views)

Okay, 'fess up. How many of you have designed a rocket, and when you actually built it, you decided you didn't like it after all?

If that was the case, what did you do?

Did you decide it would work better in a different scale (smaller or larger)?


Any comments would be useful.


Thanks, and cheers,

__________________
Jay Goemmer
"Centuri Guy"/"Tau Zero"
YORF Member 28
Semroc SAM #0029
NAR 86131


"I think about organizing things all the time. Never seems to happen. I find something that piques my interest and I'm off on a quest. Or a Centuri. "

--Bill Eichelberger, 02/22/2022


“Centuri fret buzz in an updated form.”
Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014

Uhmmm, I've got a few that never made it to the build pile because I really didn't like how it looked after working up the simulation file...

I've also got one or two that disappointed me after their first flights. Nothing a near-total re-design couldn't clear up...

Do those count?

__________________
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

Okay, here's the deal: I started building my original 18mm sized "Carrier Wave," and I decided it was just too small. Then I took a took at the deployment rates, which turned out to be much too fast on 18mm motors.

So I did a roughly 137% upscale (main body tube went from ST-7 up to ST-10) with an 18mm mount. That gave me *much* better deployment times, so I shoved a 13mm mount into my original design. Voila, problem solved!

So now I'm referring to my upscale as the "Carrier Wave," while the original size is now "Carrier Wave Jr." I'd love to kit this one, but since it bears a striking resemblance to the Estes "rocket parts diagram" from 2004... Well, I'd just rather not take my chances. (Especially with a 2-stage version. )


Craig, I guess this only counts as "one" design.


Propaganda for your consumption follows immediately.

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Carrier_Wave_Jr.rkt (44.2 KB, 91 views)

__________________
Jay Goemmer
"Centuri Guy"/"Tau Zero"
YORF Member 28
Semroc SAM #0029
NAR 86131


"I think about organizing things all the time. Never seems to happen. I find something that piques my interest and I'm off on a quest. Or a Centuri. "

--Bill Eichelberger, 02/22/2022


“Centuri fret buzz in an updated form.”
Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014

Okay, here's the "mas grande" version.

(Bill, that means "more bigger-er-er" in Spanish. Just in case you were wondering.)

Deployment velocity on the C6-5 is rather high... I'd suggest using a good-sized streamer instead of the standard parachute.

Oh, and as usual, I have to issue the warning that not all of the parts listed for this model may be available from Semroc just yet... Namely, the 137% upscale of the BC-730P nose cone (I don't know if BC-1042 will be Carl's official designation for it), as well as the CPT-1040 clear plastic payload tube.


At any rate, there you go.

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Carrier_Wave.rkt (75.2 KB, 82 views)

__________________
Jay Goemmer
"Centuri Guy"/"Tau Zero"
YORF Member 28
Semroc SAM #0029
NAR 86131


"I think about organizing things all the time. Never seems to happen. I find something that piques my interest and I'm off on a quest. Or a Centuri. "

--Bill Eichelberger, 02/22/2022


“Centuri fret buzz in an updated form.”
Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014

Jay,

Why not just drop down to the BC-1041P? It's only 0.10" shorter, but has the right shape. And you could, in a pinch, substitute the ST-1040 for the clear tube. That would at least get it test flying.

__________________
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

Carl just released a bunch of new nose cones, and it turns out that the official name for this one is BC-1041G. (chuckling)

Two updated files are immediately below.


.

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Carrier_Wave_v2.rkt (75.2 KB, 71 views)

__________________
Jay Goemmer
"Centuri Guy"/"Tau Zero"
YORF Member 28
Semroc SAM #0029
NAR 86131


"I think about organizing things all the time. Never seems to happen. I find something that piques my interest and I'm off on a quest. Or a Centuri. "

--Bill Eichelberger, 02/22/2022


“Centuri fret buzz in an updated form.”
Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014

Okay, just as a joke I put the 137% upscaled BC-723P (which Carl calls the BC-1031) on the body of the Carrier Wave Jr. to come up with *this* one.

I added another inch to the body tube to make the design a little more stable *and* to make additional room for the recovery system.


The only other word I can think to describe the "Carrier Wedgie" is just plain twisted. *And* silly. Okay, that's *two* words, but there you go.


.

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Carrier_Wedgie.rkt (35.5 KB, 74 views)

__________________
Jay Goemmer
"Centuri Guy"/"Tau Zero"
YORF Member 28
Semroc SAM #0029
NAR 86131


"I think about organizing things all the time. Never seems to happen. I find something that piques my interest and I'm off on a quest. Or a Centuri. "

--Bill Eichelberger, 02/22/2022


“Centuri fret buzz in an updated form.”
Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014