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  #191  
Old 09-05-2008, 12:32 PM
CPMcGraw's Avatar
CPMcGraw CPMcGraw is offline
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Quote:
Originally Posted by CoachJT
...Now.... if we get the rain up here that is being called for, maybe I can get it built up this weekend


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...
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  #192  
Old 09-05-2008, 12:42 PM
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CoachJT CoachJT is offline
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Quote:
Originally Posted by CPMcGraw
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...


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.
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  #193  
Old 09-07-2008, 11:17 PM
Les Les is offline
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Default Update to my design.

Quote:
Originally Posted by CPMcGraw
Les,

Sounds like a program instability issue to me. Have you tried uninstalling the program, then re-installing, to see if that might clear things up?



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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  #194  
Old 09-13-2008, 06:01 PM
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Tau Zero Tau Zero is offline
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Question Second thoughts...

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,
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  #195  
Old 09-13-2008, 09:16 PM
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CPMcGraw CPMcGraw is offline
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Quote:
Originally Posted by CenturiGuy
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,


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?
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  #196  
Old 09-22-2008, 12:00 AM
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Thumbs up Carrier Wave: The Recalibration

Quote:
Originally Posted by CenturiGuy
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)?
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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Jay Goemmer
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“Centuri fret buzz in an updated form.”
Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014

Last edited by CenturiGuy : 09-22-2008 at 12:16 AM.
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  #197  
Old 09-22-2008, 12:07 AM
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Tau Zero Tau Zero is offline
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Thumbs up Carrier Wave: Even Bigger

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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Jay Goemmer
"Centuri Guy"/"Tau Zero"
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“Centuri fret buzz in an updated form.”
Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014

Last edited by CenturiGuy : 09-22-2008 at 12:42 AM.
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  #198  
Old 09-22-2008, 03:06 PM
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CPMcGraw CPMcGraw is offline
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Quote:
Originally Posted by CenturiGuy
...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)...D


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.
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  #199  
Old 09-28-2008, 11:29 PM
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Thumbs up Carrier Wave: Minor Update

Quote:
Originally Posted by CenturiGuy
the 137% upscale of the BC-730P nose cone (I don't know if BC-1042 will be Carl's official designation for it)
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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Jay Goemmer
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“Centuri fret buzz in an updated form.”
Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014
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  #200  
Old 09-29-2008, 12:14 AM
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Talking Carrier WEDGIE: One Last Variation

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