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  #131  
Old 08-03-2008, 10:22 PM
Tau Zero's Avatar
Tau Zero Tau Zero is offline
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Join Date: Mar 2005
Location: Twin Falls, Idaho, USA
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Thumbs up Back into the fray (for now)...

Quote:
Originally Posted by James Pierson
Just what this design needed Jay . I also see that you have added an engine hook as well. I, also have been thinking of going back to engine hooks in my design as you have Jay. The convienence and reloading speed of an engine hook has me rethinking the tape method. Taping up motors just takes too long and if hurried can result in an ejected casing headache . [SNIP]

Thanks for the input and redesign
Jim,

No problem. You inspired me so much I actually ordered the nose cones and centering rings (CR-1013, 1020) for the Argo-C and my Mars Voyager

(pictures here) from Semroc this afternoon!


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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  #132  
Old 08-03-2008, 11:06 PM
James Pierson James Pierson is offline
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Join Date: Dec 2005
Location: Washington State
Posts: 654
Smile Jay's Back in the Balsa!

CenturiGuy Quote:
Quote:
Jim,

No problem. You inspired me so much I actually ordered the nose cones and centering rings (CR-1013, 1020) for the Argo-C and my Mars Voyager from Semroc this afternoon!


Cheers,


Thanks Jay, I am glad you are inspired and back in the mix of it. Craig and I are looking forward to the 500th design posting. Don't tell Craig but, I have already started saving a few designs for the next 12 Days Before Christmas 2008 . One of them is my version of the Black Hole Space Probe II.

Your Pal, JP.

James Pierson
NAR# 77907

.
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  #133  
Old 08-05-2008, 01:47 PM
CPMcGraw's Avatar
CPMcGraw CPMcGraw is offline
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Join Date: Mar 2005
Location: Mobile, Alabama
Posts: 5,357
Exclamation New Plan -- Tying Flyger

Here's another ring-fin plan for 18mm motors. More doodling...

Length: 18.81"
Diameter: 0.908" (ST-8)
Fin Span: 3.37"
Weight: 1.12 oz

A8-3......195'......Dv 9 FPS.......36" x 1/8" rod
B6-4......370'......Dv 17 FPS......36" x 1/8" rod
B4-4......375'......Dv 20 FPS......36" x 1/8" rod
C6-3......690'......Dv 26 FPS......36" x 1/8" rod

Enjoy!
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  #134  
Old 08-05-2008, 01:53 PM
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CPMcGraw CPMcGraw is offline
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Exclamation New Plan -- Crusader

Another design using 1/8" dowel stock in the fin structure. For 18mm motors...

Length: 22.70"
Diameter: 0.908" (ST-8)
Fin Span: 5.55"
Weight: 1.23 oz

A8-3......240'.......Dv 9 FPS.......36" x 1/8" rod
B4-4......550'.......Dv 21 FPS......36" x 1/8" rod
B6-4......555'.......Dv 26 FPS......36" x 1/8" rod
C6-5......1145'......Dv 26 FPS......36" x 1/8" rod

Enjoy!
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  #135  
Old 08-05-2008, 01:54 PM
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CPMcGraw CPMcGraw is offline
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Default Magic Number Update

38...
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  #136  
Old 08-05-2008, 11:14 PM
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Tau Zero Tau Zero is offline
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Thumbs up Mars Voyager -- Take 3!

Quote:
Originally Posted by CenturiGuy
I actually ordered the nose cones and centering rings (CR-1013, 1020) for the Argo-C and my Mars Voyager [SNIP] from Semroc
Craig, Jim, and all,

This one *doesn't* count toward the "Magic Number" since I'm updating it from 2006. I plan on building it with 3/32" balsa and "skinning" the fins with label paper. While the performance is slightly improved from using 1/8" balsa, *both* versions fly best using C6-3 (18mm) and E9-4 (24mm).

+++

Mars Voyager. version 3 (Semroc parts list)

BC-2032 Nose cone
ST-2060 Body tube
2 - LL-320 Launch lugs
4 ST-530 Body tubes
ST-10120 Body tube -- 12" L, 3.0" inside PR-1020, ST-2060
PR-1020 Paper Reducer (Transition)** -- 1.5" L
2 - CR-1020 Centering rings
EM-710 Engine mount (protrudes 0.125")
Includes:
* 2 - CR-710 Centering rings
* ST-730 Body tube
* TR-7 Thrust ring (Engine block)
* EH-28 Engine hook
CP-160 Parachute
Kevlar thread
Elastic cord
Fin set -- 3/32" balsa
Launch lug standoff -- 3/32" balsa

___

**Not all parts available from Semroc yet.


Motor / Max. Alt. / Dv / Calibers (stability)

18mm mount (standard)
C6-3 -- 431 ft. -- 8 fps -- 2.27

24mm mount (mod)
C11-3 -- 371 ft. -- 19 fps -- 1.84
D12-3 -- 672 ft. -- 28 fps -- 1.63
E9-4 -- 1051 ft. -- 0.8 fps -- 1.25


PLEASE USE AT *LEAST* a 48" launch rod!
This design first becomes stable at heights of 31", 31", 30", and 36" on the motors listed above.

+++
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__________________
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

Last edited by CenturiGuy : 08-06-2008 at 11:05 PM.
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  #137  
Old 08-06-2008, 10:27 PM
James Pierson James Pierson is offline
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Join Date: Dec 2005
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Posts: 654
Default New Design: Cloud Splitter

Looks good Jay and thanks for the parts list .

I tried to post this design the other night but the net was soooo sloooow or maybe I had my tower turned to an UHF channel or something . Sunspots that muat have been it .

This next design called the Cloud Splitter (Name inspired by Craig's Cloud Seeker) has layer fin design along with a ring tail. This fin method I used a few years ago on the Static Probe design th help reienforce the narrow pointed fins against flight tear off. I used a simular method on the Cloud Splitter to help reinforce the pod looking fins that are attached to the ring tail fin as these pod fins have only a 3/4 inch root area to glue to. This fin designs system is somewhat elaborate and may be time concuming to build but should be structually sound in flight. We hope .


Enjoy and Thanks Again, JP

James Pierson
NAR# 77907


Cloud Splitter (18mm)
Launch guide length: 36.0000 In

MOTOR.................MAX. ALTITUDE...........DEP. VELOCITY
A8-3..................211.02713 Ft..............2.3327 ft/s
B4-4..................482.73157 Ft..............7.0144 ft/s
B6-4..................488.82428 Ft.............11.2457 ft/s
C6-5.................1019.38453 Ft..............9.8856 ft/s

.
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  #138  
Old 08-07-2008, 11:03 AM
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CPMcGraw CPMcGraw is offline
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Thumbs up Magic Number Update

37...
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  #139  
Old 08-07-2008, 02:47 PM
InFlight InFlight is offline
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Join Date: Mar 2008
Location: Michigan
Posts: 286
Default New Design -- DC Schnuck (prototype)

Hope you guys don't mind me crashing this party

Here's one I worked up a while back.


Length: 21.7"
Diameter: 1.32 (BT55)
Weight: 2.9 oz

DC Schnuck (18mm)
Launch guide length: 36"

Motor.........Atl................Deploy Velocity
B4-4...........295'.................17 FPS
B6-4...........300'.................12 FPS
C6-5...........735'.................4 FPS


.
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Last edited by InFlight : 08-07-2008 at 03:32 PM.
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  #140  
Old 08-07-2008, 06:27 PM
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CPMcGraw CPMcGraw is offline
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Default

Quote:
Originally Posted by InFlight
Hope you guys don't mind me crashing this party


We don't mind at all!

Interesting twist to the idea of "tube fins"...

Do you mind if we include this into the "official" BARCLONE line-up?
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