__________________
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

After many, many version of this design I finally settled on this version 3 of the Black Hole
Space Probe II. It is definetly different than the original version and yet I believe that it
still holds the same unique style. Some will like it and some will not, however, here it is
none the less. The Dv's for the C6-5 are high with a late ejection and with an C6-3 even
worse so it went with the C6-5. The actual build/test flight will probably be with the C6-3
as a built version always seems to be heavier that the sim.

3rd Annual

5 Days Before Christmas

Enjoy and Merry Christmas to ALL, JP.

James Pierson
NAR# 77907

Black Hole Space Probe II (18mm)
Launch guide length: 36.0000 In

MOTOR.................MAX. ALTITUDE...........DEP. VELOCITY
A8-3..................140.36600 Ft.............19.1322 ft/s
B4-4..................320.18458 Ft.............20.4378 ft/s
B6-4..................323.69121 Ft.............17.4312 ft/s
C6-5..................671.07115 Ft.............26.4485 ft/s
.

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Black Hole Space Probe 3.rkt (99.4 KB, 89 views)

By Special Request:

Merry Christmas John.
Here is the 24mm upscale of the Crazy Bee. All parts should be available at Semroc. Since I know you like option I went with both 1/8" and 3/16" launch lugs for this design. Also added an CR ejection Baffle and an E engine hook withan D-E Spacer ring. My only concern is how well the RT-99D fit around the ST-1160 Tube fins. It might be an somewhat snug fit and one must build it to find out how snug. Feel free to change the name and colors as you wish for that personal touch. If you have any build question just contact me or just start a build thread and I'll guide you through it.

Merry Christmas and Enjoy, Your Pal JP.

James Pierson
NAR# 77907

Crazy Train (24mm)
Launch guide length: 48.0000 In

MOTOR.................MAX. ALTITUDE...........DEP. VELOCITY
D12-5..................824.97375 Ft.............6.3180 ft/s
E9-6..................1282.84121 Ft............26.8714 ft/s

Semroc Parts List:

Qty......Part#...........Description

1-.......BC-1354.........Nose cone
1-.......ST-13180........Upper Body tube
1-.......HTC-13..........Tube coupler
1-.......CP-20...........Parachute
1-.......SCK-30..........Kevlar Shock Cord
1-.......EC-124..........Shock Cord
1-.......CR-713..........Ejection Baffle CR
1-.......SE-12...........Screw Eye-Large
1-.......LL-117..........Launch lug
1-.......LL-320..........Launch lug
1-.......ST-1363.........Lower Body tube
1-.......ST-950..........MM Body tube
1-.......CR-9-13.........Centering rings 6pk
1-.......TR-9............Engine block
1-.......TS-9............Engine block spacer
1-.......EH-38...........Engine Hook E
4-.......RT-99D..........Ring Tail Body tube
3-.......ST-1160.........Tube Fin Body Tube

PS. The snow has started and I am hunkered down and ready for the 10"-18" of snow with the 90 mph wind that are expected . Take care and wish you the best of all things, JP.

.

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Upscale Crazy Bee 24mm.rkt (79.5 KB, 109 views)

James
Question? Did you Sim this design with a E9-8 ? Just wondering if the Dep Vel would be lower.

also Semroc Chute CP-20 not for sale yet.

We are getting very lite snow now but we do not expect that high of winds 90mph more like 25-40mph which is bad enough.


John

__________________
John

NAR #91135 L1
SAM #0037

John, the sim for the E9-8 has Dv's of 65.85 which is way to high. Looking at other chute option at Semroc I would go with the 16" chute as we prefer them closer to the pad .

Hope this helps, JP.

James Pierson
NAR# 77907

Okay, rocketry fans, here's my first officially released RockSim 9 design. After I saw the "Peak of Flight" issue previewing RS9's new "pod" feature, I starting working on this rocket.

Sure, the yellow and purple color scheme screams, "SHROX!" (But have you seen *Craig's* new RS9 designs?!? )

Babylon 5 fans may remember that the B5 space station orbits the planet Epsilon Eridani III. "Epsilon 3" is my first nod in that direction, and *yes* Virginia, "Eridani" is no doubt in the wings. (Or will be *taking* wing, if you know what I mean. )


My usual file layouts follow, with the brand-spanking new "03" end view, courtesy RockSim 9's new "detachable" viewing window.


Cheers!

.

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Epsilon_3_RS9.rkt (95.6 KB, 100 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

Stability margins are a lot better now, but deployment velocities leave something to be desired.

13mm motors couldn't even get this thing off the ground, so I had to kick it up to 18mm, add 1.5" to the ST-8 tube, and an SE-14 screw eye. (Apparently that's my "secret weapon" when it comes to inducing [relative] stability.)



.

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Nebula_Rat_V9_v2.rkt (105.7 KB, 82 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

3rd Annual

4 Days Before Christmas

Enjoy and Merry Christmas to ALL, JP.

James Pierson
NAR# 77907

Polaris Probe (18mm)
Launch guide length: 36.0000 In

MOTOR.................MAX. ALTITUDE...........DEP. VELOCITY
B4-4..................245.57907 Ft.............26.1485 ft/s
B6-4..................253.56398 Ft.............21.1870 ft/s
C6-5..................637.10958 Ft. ...........17.3764 ft/s
.

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Polaris Probe.rkt (69.0 KB, 70 views)

I just ran a simulation using the C6-7, and got a Dv of 29 FPS even. That's better than the 38 FPS of the C6-5.

Think I'm going to build this one. It's just oddball enough to draw some attention...

__________________
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

Here ia an 13mm design I call the Star Runner. With an design like this I am hoping that
Rocksim 9 will be able to predict the drag on the tip fins and pods. This will hopefully
allow me to eliminate or reduce the nose wieghts, improve altitude preformmance, and reduce
the Dv's. Wishful thinking?? For now the A3T-4 is the motor to go with.

3rd Annual

3 Days Before Christmas

Enjoy and Merry Christmas to ALL, JP.

James Pierson
NAR# 77907

Star Runner (13mm)
Launch guide length: 36.0000 In

MOTOR.................MAX. ALTITUDE...........DEP. VELOCITY
1/2A3T-2..............135.61614 Ft.............20.2044 ft/s
A10T-3................362.12598 Ft.............23.5035 ft/s
A3T-4.................375.39370 Ft.............5.1211 ft/s
.

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Star Runner.rkt (67.7 KB, 92 views)