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"
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

CenturiGuy Quote:


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

.

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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Attached Files

Tying Flyger.rkt (63.2 KB, 106 views)

__________________
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

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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Attached Files

Crusader.rkt (74.2 KB, 92 views)

__________________
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

__________________
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

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.

+++

Attached Thumbnails

       

Attached Files

MarsVoyager_v3.rkt (112.0 KB, 81 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

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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Attached Files

Cloud Splitter 3.rkt (68.7 KB, 97 views)

__________________
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

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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DC Schnuck.rkt (63.8 KB, 94 views)

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?

__________________
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