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-   -   New Design -- Abrogator (http://www.oldrocketforum.com/showthread.php?t=8050)

Tau Zero 11-07-2010 11:50 PM

New Design -- Abrogator
 
4 Attachment(s)
Apparently I've seen the "Babylon 5" TV show at least *one* time too many, and I borrowed the gold and purple color scheme from the Centauri ships. :o

Definition: abrogate - revoke formally. abolish, get rid of - do away with.

I can hear Londo Mollari saying in his Hungarian accent, "We are formally revoking your *tiny leetle government's* independence, and sending our personal representative to oversee your planet for us. " :eek: ;) :D


I'll post the fin pattern later, but I wanted to get your input on this design.

I have several others of this general size (Semroc/Centuri ST-10 upper body tube/ST-13 lower body tube). While I prefer 3 fins instead of 4, with this maximum diameter (1.34"), I often have to increase the number to 5 fins to get reasonably slow (i.e., "non-chute shredding") deployment velocities. These fins extend about 2.75" from the lower body tube.


Craig and anybody else, got any thoughts along these lines? Please post 'em here!

Cheers,
.

CPMcGraw 11-08-2010 10:50 AM

Looks like "Design #801" to me... :D

Should be plenty rugged for typical flying, nothing delicate to break off. Only suggestion I might make is to move the launch lug forward a bit. Position it closer to the CP, or between the CP/CG points, to keep aerodynamic torquing down during launch. Load it with the C6 (heaviest engine) to find the zone.

Let's go with it!

Brain 11-08-2010 07:01 PM

Quote:
Originally Posted by CenturiGuy
Craig and anybody else, got any thoughts along these lines? Please post 'em here!

My first gut reaction: I'm not crazy about the fins. In my head, they don't match the 'feeling' I get from the segmented body tube, which I like a whole bunch!

I could get to like them, but I'd be interested in seeing some alternative styles... Just my 2 cents worth...

Tau Zero 11-08-2010 10:49 PM

Thanks, Brain!
 
Quote:
Originally Posted by Brain
My first gut reaction: I'm not crazy about the fins. In my head, they don't match the 'feeling' I get from the segmented body tube, which I like a whole bunch!

I could get to like them, but I'd be interested in seeing some alternative styles... Just my 2 cents worth...
Brain,

Thanks for your two cents! :D

I'll let my "little gray cells" stew some more on the fin patterns. I have no problem with trying some "variations on a theme," like I did with my "5820 (Fifty-Eight Twenty)" series a while back.

Cheers,
.

CPMcGraw 11-09-2010 12:21 AM

Quote:
Originally Posted by CenturiGuy
Brain,

Thanks for your two cents! :D

I'll let my "little gray cells" stew some more on the fin patterns. I have no problem with trying some "variations on a theme," like I did with my "5820 (Fifty-Eight Twenty)" series a while back.

Cheers,
.


There's always the "open frame" concept... :D

CPMcGraw 12-26-2010 02:29 PM

Fin Patterns
 
3 Attachment(s)
Here's the fin sheet pattern. You will need two sheets to do the model as-designed, and this will leave 1 extra fin (3 fins per sheet).

johnnwwa 12-26-2010 03:51 PM

The first thing I look at when I see a new design published here is this.

The design itself. Would I build this rocket, Does the design appeal to me.
The answer is YES.
I move on to.

What motors will this rocket fly on? .. In this case A,B,C prefect
What is it's maximum altitude . Just about a 1000' perfect. ( I like to be able to see my rockets for lift off to recovery/ landing)

What is the FPS at apogee ... In this case all motors used are less that 7 FPS perfect.

So I would say Jay..You Have a Winner.

John

Tau Zero 12-27-2010 12:32 AM

Jay chats with John W.
 
Quote:
Originally Posted by johnnwwa
The first thing I look at when I see a new design published here is this.

The design itself. Would I build this rocket, Does the design appeal to me.
The answer is YES.
I move on to.

What motors will this rocket fly on? .. In this case A,B,C prefect
What is it's maximum altitude . Just about a 1000' perfect. ( I like to be able to see my rockets for lift off to recovery/ landing)

What is the FPS at apogee ... In this case all motors used are less that 7 FPS perfect.

So I would say Jay..You Have a Winner.
Thanks John! It feels awful lonely to post a design here and get NO comments. (sad look)

I mean, I don't think I've "got it all down," even with the Semroc release of my Tau Zero design. (Thanks, Carl!) So anything constructive that *anybody* wants to say is *greatly* appreciated.

FWIW, I *do* have an alternate "tube fin" variation that broke the current version of RockSim, so hopefully Paul Fossey is making at least some progress on fixing that. :o


Glad you like it, John! Thanks for your comments!


Cheers,

johnnwwa 12-27-2010 11:31 AM

Jay

Keep those designs coming.

BTW I live pretty close to James Pierson we get together to test his designs at our launch site. Overhead photo here. www.4hrockets.blogspot.com
\
The user name Johnnwwa is John N orth W est Wa shington

John Ludwig

James and I are going to NARCON :D

Tau Zero 12-27-2010 09:39 PM

John Ludwig, master of the drumkit?
 
Quote:
Originally Posted by johnnwwa
Jay

Keep those designs coming.

BTW I live pretty close to James Pierson we get together to test his designs at our launch site. Overhead photo here. www.4hrockets.blogspot.com
\
The user name Johnnwwa is John N orth W est Wa shington

John Ludwig
John,

All these years I've been reading it "Johnn W. WA." :o

So I may have to remember that your *real* last name is the same as a company that manufactures drumsets.


Please forgive me if I accidentally call you "Johnny Roland," because that's the brand of drums that I play. :eek: :rolleyes: ;) :D



Quote:
James and I are going to NARCON :D
Excellent! Have fun! :cool:


Cheers,


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