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  #31  
Old 01-21-2008, 09:46 PM
James Pierson James Pierson is offline
Master Modeler
 
Join Date: Dec 2005
Location: Washington State
Posts: 654
Lightbulb New Design: Discord Missile

Here is my version of the Star Wars Discord Missile. I decided to delete the froward nose
fins as they make the design unstable. For as many add on tubes as this design has the
preformance seems to be good. Gotta love this sci-fi stuff .

Enjoy and Thanks Again, JP

Discord Missile (18mm)
Launch guide length: 36.0000 In

MOTOR.................MAX. ALTITUDE...........DEP. VELOCITY
B4-4..................326.50787 Ft.............12.6591 ft/s
B6-4..................336.08268 Ft..............7.4773 ft/s
C6-5..................817.55906 Ft..............6.8211 ft/s

James Pierson
NAR# 77907
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  #32  
Old 01-26-2008, 06:21 PM
Tau Zero's Avatar
Tau Zero Tau Zero is offline
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Join Date: Mar 2005
Location: Twin Falls, Idaho, USA
Posts: 2,036
Thumbs up Laser Wolf, version 2

Quote:
Originally Posted by CPMcGraw
AKA "Laserene"...

Be sure to look at those "launch guide lengths" in the sim sheets. Both the C11 and the D12 require 48" x 3/16" rods. The E9 takes 47 out of 48, so you need a 60" rod or tower.

I still like the design. "She jus' needs more power, Capt'n..."
Quote:
Originally Posted by James Pierson
Looks great Jay, however after a closer look the Laser Wolf is a bit heavy as Craig has suggested. Its also way overstable. Both heavy and overstable are to blame for the take off speeds and launch rod length required.
Might concider the following:
Change from Nylon to plastic chute (Nylon Heavy)
Upper fins to 1/16" thickness
Other fin to 3/32" thickness
Reduce large lower fins size by 25% or so
Reduce length of upper BT-60
Craig and James,

I took your suggestions to heart (for the most part), and here is "Laser Wolf" Version 2. I hacked 5 inches off the BT-60, and moved the small fins forward from the LT-115. I put the fins on a diet, and reduced the largest fins from a 1.68X upscale to only 1.36X (about 26% smaller now). I moved the launch lug aft, and put it on a standoff.

While I was able to switch to a C11-5 instead of a C11-3, the launch rod lengths will need to stay at 48" for the C11 and D12 (which appear to stabilize at 38" and 35", respectively). The E9-6 doesn't "get stable" until 44", so a 60" rod will still be needed.


Quote:
Originally Posted by James Pierson
Hope this is helpful, and don't worry, I have to do the design diet thing all the time with my freaky designs. .
Quote:
Originally Posted by CPMcGraw
...And as for those voices, you might try a few generous doses of "PF Dark Side" and "AP Valid Path". (Now there's a combination of music: A Valid Path to the Dark Side...)
"The lunatic is in the hall... The lunatic is IN MY HEAD..."
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File Type: tif LaserWolf_v2_02.tif (92.6 KB, 113 views)
__________________
Jay Goemmer
"Centuri Guy"/"Tau Zero"
Semroc SAM #0029
NAR 86131


“Centuri fret buzz in an updated form.”
Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014
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  #33  
Old 01-26-2008, 06:51 PM
James Pierson James Pierson is offline
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Join Date: Dec 2005
Location: Washington State
Posts: 654
Thumbs up Looks Good Jay.

I really like this design Jay. This one get my vote for your next kit release . I you don't like the fin standoff amd the launch lug placement concider the following.


Cut that LL330 in half or just use two LL320 launch lugs.
One LL on the upper body tube and the other on the side of an large fin.
You end up with an Upper LL and an Lower LL. (Lower LL in rocksim Make Inside Tube)
One drawback to this is a launch rod is needed for alignment during assembly .

Once again Jay, Great Design!

Your Pal, JP

James Pierson
NAR# 77907
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  #34  
Old 01-27-2008, 02:41 PM
CPMcGraw's Avatar
CPMcGraw CPMcGraw is offline
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Location: Mobile, Alabama
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Default

Jay,

I like what you've done here, too. Dv numbers are high, but not horribly so. She just needs a bit more "kick" off the pad (like a lot of us...).

I'm still trying to figure out how I could inspire anything to go on a diet...
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  #35  
Old 01-27-2008, 11:53 PM
Tau Zero's Avatar
Tau Zero Tau Zero is offline
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Location: Twin Falls, Idaho, USA
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Talking Jay (ahem) "weighs in"

Quote:
Originally Posted by CPMcGraw
She just needs a bit more "kick" off the pad (like a lot of us...).

I'm still trying to figure out how I could inspire anything to go on a diet...
Craig,

My wife's been insisting for years that I could lose some weight. I keep telling her I'd look stupid without a head and one arm.

I didn't start gaining weight until after I'd met her. So I ask her if she'd like me to be fat and happy or thin and miserable.

She tells me that's *not* what she means. I just say, "Oh, well."


Cheers,
__________________
Jay Goemmer
"Centuri Guy"/"Tau Zero"
Semroc SAM #0029
NAR 86131


“Centuri fret buzz in an updated form.”
Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014
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  #36  
Old 01-30-2008, 10:54 PM
Tau Zero's Avatar
Tau Zero Tau Zero is offline
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Join Date: Mar 2005
Location: Twin Falls, Idaho, USA
Posts: 2,036
Wink Jay's next release?

Quote:
Originally Posted by James Pierson
I really like this design Jay. This one get my vote for your next kit release .
*I'd* probably pick something a lot simpler.

Although I'd need to figure out a more effective (not to mention aesthetically pleasing) method for compiling instruction sheets.

Y'know, Dave at Sirius Rocketry uses black and white photos. (--Hmm...)


--Sorry, did I say that out loud?


(It doesn't help that I get distracted with writing songs and screenplays, either. )


Cheers,
__________________
Jay Goemmer
"Centuri Guy"/"Tau Zero"
Semroc SAM #0029
NAR 86131


“Centuri fret buzz in an updated form.”
Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014
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  #37  
Old 01-30-2008, 11:06 PM
CPMcGraw's Avatar
CPMcGraw CPMcGraw is offline
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Location: Mobile, Alabama
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Quote:
Originally Posted by CenturiGuy
...Although I'd need to figure out a more effective (not to mention aesthetically pleasing) method for compiling instruction sheets. ...(It doesn't help that I get distracted with writing songs and screenplays, either. ) ...


You want distraction from rocketry? Try PHP/HTML/CSS/MySQL haiku...

Call it 'Ode to a BLOB I once thought I knew'...

My hair drops in clumps and my face turns dark blue...

Cause it takes all my time from drawing something new...
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  #38  
Old 02-13-2008, 12:50 AM
James Pierson James Pierson is offline
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Join Date: Dec 2005
Location: Washington State
Posts: 654
Default New Design: Hostile Intentions

I Have been fighting with this design for some time now. I think I have finally got it in a version that will actually fly. DV's are good and most importantly the lift off velocities are acceptable with a 36" rod. The DV's are still a little high so I used 1/4" shock cord that is 36" long. Also funny twist is that I actually have built this design (All Semrco Parts) as of 02-08-08 and am just now posting the Rocksim file. OOPS! I will post photo's later of all that I have built before they under go the spring test flights hopefully with Jon .

A big THANK YOU to Carl nd Sheryl of SEMROC for sending me all the right part no matter how poorly I describe what I need. Carl always seem to go above and beyond the call of duty. Thanks Carl, the CR-KV-60 was exactly what I needed for the Tranquility 9 design (to be built and unvaled soon) .

Enjoy and Thanks Again, JP

Hostile Intentions Version 4 (18mm)
Launch guide length: 36.0000 In

MOTOR.................MAX. ALTITUDE...........DEP. VELOCITY
B4-4..................249.67093 Ft.............26.9488 ft/s
B6-4..................257.11778 Ft.............23.3635 ft/s
C6-5..................640.75787 Ft. ...........19.1385 ft/s

James Pierson
NAR# 77907

.
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  #39  
Old 02-13-2008, 02:19 PM
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EchoVictor EchoVictor is offline
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Join Date: May 2005
Location: Metro Detroit, MI
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Default

WOW, James, just WOW!

Later,
EV
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  #40  
Old 02-13-2008, 11:49 PM
James Pierson James Pierson is offline
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Join Date: Dec 2005
Location: Washington State
Posts: 654
Thumbs up

Thanks EV, I knew you would be tempted with the Sci-Fi design . I am glad you like it and lets hope it flies as well as it looks . One never knows when a test flight design will turns into a W.S.M. ( Worm Seeking Missile). Its happend to me twice now. LOL.

James Pierson
NAR# 77907
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