James,

I really, really dig this one. To me, it captures the same kind of "stubby aggressiveness" that the Estes Wolverine exudes.

I hope you don't mind, but I just had to roll with it.....


From the front.


I also had this PNC-60NA laying around, an I think I might stay with it.


I don't have RockSim, so this is just eyeballed/scaled off your thumbnail. Pretty close?

Later,
EV

BTW, Craig, great job on those prototypes. Keep 'em coming!

Keep on Rollin EchoVictor

This is probably the best Christmas present ever , EV. I am quite
honored that you have built one of my designs. The photo's look great
and sure hope to hear about some flight reports soon. Feel free to make
any changes you think it needs, especially the name.

I did a tricky motor pod layout. I use BT-5 4" long and in front of
those used BT-3 2" Long just to break up the line of the motor pods.
Look like you got a pretty good "Old Carpenter Eye" to me. Here is a
close up thumbnail. Also main BT is BT-60 12" long.

Here are the flight stats:

*Launch guide length: 36.0000 In.
*20 Semroc papachute used


[B4-2]
Maximum altitude: 167.55774 Ft.
Minimum velocity for stable flight reached at: 32.7874 In.
Velocity at deployment: 10.2654 ft/s

[B6-2]
Maximum altitude: 169.14501 Ft.
Minimum velocity for stable flight reached at: 34.4641 In.
Velocity at deployment: 12.5039 ft/s

[C6-3]
Maximum altitude: 358.25619 Ft.
Minimum velocity for stable flight reached at: 32.2487 In.
Velocity at deployment: 7.8026 ft/s

EV, I notice that you had no engine mount yet so consider the
following.

[D12-3] with PNC 60-NA and CG at 5.5" from base with D12-3 loaded.
Maximum altitude: 554.91440 Ft.
Minimum velocity for stable flight reached at: 32.1334 In.
Velocity at deployment: 17.8284 ft/s

Thanks EV, and a Merry Christmas.

James Pierson
NAR# 77907

Attached Thumbnails

   

3th day Before Christmas.

Here is a design I have called the Saturn Z. It uses an 18mm motor mount and with a C6-7 will attain an altitude of over 1000 feet.

The center exterior ST-5 pod tubes were simulated using the inside tube method and not the tube fin method. The forward end of these tubes are cover up by a CR. I chose not to use the tube fin method because there is no airflow passing thrrough these pods, only the exterior surface. Also the tube fin method allows for alot of drag which changes the simulation for the worse. Your INPUT on this simulation will be greatly appreciated, JP

Enjoy and to ALL a Merry Christmas.

James Pierson
NAR# 77907

Attached Thumbnails

 

Attached Files

Saturn- Z Inside Tubes.rkt (88.8 KB, 125 views)

*Nice.*

Or to quote the movie "Dude, Where's My Car?"

*Dude.* *Sweet.*


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

Here's an example of where RockSim falls down on the job. The previous version of this plan used the RINGFIN settings for the two shrouds, and the model just barely reached 450' on a C6-3. Switching to the INSIDE TUBE settings, the altitudes doubled. Now the question becomes "Which setting is correct?"

Until I can build the prototype and actually fly it, I won't know for sure. Same holds true for the Andromeda, since I used the INSIDE TUBE setting for those shrouds.

Here's the alternate specs for the Tau Plieades:

B4-4.......584'......Dv 21 FPS
B6-4.......588'......Dv 25 FPS
C6-5......1164'......Dv 19 FPS

Enjoy!

Attached Files

Tau Plieades v2.rkt (51.8 KB, 132 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

James,

thank YOU for the cool design. I don't feel bad about missing the BT-5 to BT-3 switch, as that's hard to see, but I don't like that fact that I got the main BT length wrong. Since the PNC-60NA makes up for it in overall length, and I do like the look a bit better, I'm going to stay with it.

Like I said before, the wing shape and overall look really reminds me of the Estes Wolverine, so I think a similar name is in order. My girlfriend is a huge X-Men fan, and after hearing a few other X-Men names, she came up with the perfect one as soon as I heard it. Wolverine's nemesis.....

Sabertooth

That sends my mind working down the path for decals already, as I'm planning on doing an eyes-and-mouth style decal at the nose like the old P-40 Warhawks in WWII.

Later,
EV

Four pieces, 3/32" thick; laminate with paper label stock and CA glue. There are no curved cuts on this one, so it's just using a simple #11 and steel ruler (if you're cutting by hand...). Assemble the pieces before cutting out the slot for the rear shroud. Fill up the slot after the model is built, using available scrap balsa.

Attached Thumbnails

 

__________________
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 said,


Put Rocksim to the TEST.
I do believe that by this spring we will have put rocksim to the test with Tube fins, ring fins verses the inside tubes method if we can get a few of these prototypes build and test flown with some good flight logs. I personally am siding and hoping on the inside tube method or some of our design may need big changes .

James Pierson
NAR#77907

EchoVictor said,



Sounds like a great name EV. When the holiday season calms down and I figure out Rocksim data a little more I will change the design to your specific likes and update you.

Just an idea here about tiger claw decals on the tips of the wings .
Thanks, JP

James Pierson
NAR# 77907

2nd day Before Christmas.

Here in Washington in the Puget Sound area we had 6" of snow last night and lost power at about 1am. We just got it back at about 5pm this evening. A white Christmas looks good but what a mess on the roads, WOW.

Here is design I call The Shredder. With its aggressive looks I do believe the name fits it well.

Enjoy and to ALL a Merry Christmas.

James Pierson
NAR# 77907

Attached Thumbnails

 

Attached Files

The Shredder.rkt (69.8 KB, 84 views)