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  #691  
Old 10-17-2006, 10:49 PM
James Pierson James Pierson is offline
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Join Date: Dec 2005
Location: Washington State
Posts: 654
Default New Design: Neptune Probe

Here is a quick and dirty probe design I call the Neptune Probe. With the 18mm motor mount this bird attains about 220' on both B4-2 and the B6-2. On a C6-3 it will get an atlitude of about 385' which puts it safely in the VR class of designs. Keeping these designs in the VR class can sometimes be a challenge as well.

Lately I have finished Rocksimming the other 6 mini-jet designs and will post them asap. The final 6 designs will bring the total to 15 as promised.

Thanks and Enjoy, JP

James Pierson
NAR# 77907
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  #692  
Old 10-17-2006, 11:14 PM
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CPMcGraw CPMcGraw is offline
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Default

Quote:
Originally Posted by James Pierson
...Keeping these designs in the VR class can sometimes be a challenge as well.


I'm finding that out myself. You'd think with a 700' allowance, it would be easier to get a flyable design on a "C" motor, but it can fool you.
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  #693  
Old 10-20-2006, 12:03 AM
James Pierson James Pierson is offline
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Lightbulb New Design: Mini Jet #9

Here is Mini Jet #9. Seems to fly just as well as the others do. I like the silver and red color scheme as it seems to be more of a vintage color choice. Well at least in my minds eye. Seem to be running out of color choices in Rocksim lately anyways.

Enjopy and Thanks Again, JP

James Pierson
NAR# 77907
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  #694  
Old 10-20-2006, 12:58 AM
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Tau Zero Tau Zero is offline
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Location: Twin Falls, Idaho, USA
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Cool Do cathode rays cause mutations?

I've been working in TV for almost 6 years, and *watching* TV for much longer, so it's no *wonder* things like this happen.

James Pierson accused me of keeping all my "really *cool*" designs to myself. But I threw this together tonight, and I *had* to show *somebody!* --So here you go.

(JP, this was *somewhat* inspired by your "Neptune Probe" design, which is Pretty Stinkin' Cool, as far as *I'm* concerned. )

And I figure I can at least release my RockSim file for the Semroc BC-1043, which is Carl's recreation of the Centuri PNC-102 "SkyLab" nose cone. (I took measurements from an *original* PNC-102. )


EDIT: I just posted a higher-resolution version of the RockSim 3D exported images. Sun 22 Oct 2006
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Jay Goemmer
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Semroc SAM #0029
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03 Sept 2014

Last edited by CenturiGuy : 10-22-2006 at 06:43 PM.
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  #695  
Old 10-20-2006, 11:34 PM
James Pierson James Pierson is offline
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Lightbulb New Design: Irr-Regulas

Jay, the Mutator is a vey cool design. I see the Idaho influence with the word "tator" in the name.
I am glad you liked the Neptune Probe and you are welcome to use
any spec of any design of mine as long as you post it.


Here is a new design I call the Irr-Regulas. I have managed to make it
with three different motor mounts to meet the different circumstances
of each builder. The 13mm motor mount will quailfy as a schoolyard
sounder for the rocketeer with a smaller fiying field. The 18mm motor
mount will attain a atlitude of 971 feet on a C6-5 for the rocketeer
with a larger flying area. Also changing the main body tube from a
BT-50 to a BT-60 will quaiify this design in the VR class as the
atiitude on a C6-3 motor will only be 463 feet. This motor changing
business seems to work with most designs with a little tweeking here and there.

My goal lately is to save my 12 best designs and post them on the week
and a half before Christmas, hence, the 12 designs of Christmas. I have
seven saved up so far. You all will have to wait to open up your presents until then!

Enjoy and Thanks Again, JP

James Pierson
NAR# 77907

.
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  #696  
Old 10-20-2006, 11:52 PM
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CPMcGraw CPMcGraw is offline
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Quote:
Originally Posted by James Pierson
...Here is a new design I call the Irr-Regulas. I have managed to make it with three different motor mounts to meet the different circumstances of each builder...


Ahh, "Object-Oriented" rocketry, where the same design gets used in multiple ways...

Seems like I've done that a few times myself...

I like the non-symmetrical detailing, but actually making this one fly is going to be interesting to see if there are any drag-related issues that would pull the model off of a straight track from the pad. Final tweaking of a prototype might indicate the need for some off-set (or even vectored) thrust to compensate, which RockSim cannot handle yet.

Keep up the designs, James. I've lost count right now of how many this will make, but the number 400 is beginning to seem reachable!
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  #697  
Old 10-21-2006, 12:11 AM
James Pierson James Pierson is offline
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Join Date: Dec 2005
Location: Washington State
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Question Rocksim Stability Analysis

Craig, as far as drag related non-symmetrical designs and wondering if this design would veer of to one side, I have been using the stability analysis feature in Rocksim to check the symmetery. I at least hope that is what this feature is for anyways?? On the tool bar under "Rocket" I click "Stability Analysis". I try to keep the blue and green circles semmetrical to each other. At least my best guess and some tweeking seems to do the trick. If I am using this feature in the wrong manner let me know what it (stability analysis feature) is would you. JP

James Pierson
NAR# 77907
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  #698  
Old 10-22-2006, 07:50 PM
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Tau Zero Tau Zero is offline
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Location: Twin Falls, Idaho, USA
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Wink Reading "the fine print"

Quote:
Originally Posted by James Pierson
Jay, the Mutator is a vey cool design. I see the Idaho influence with the word "tator" in the name.
Good catch from one of the states "next door!"

Actually, Friday at work I decided I should change the name to "Mu-Tater," and see if I could come up with a cartoon picture of a radioactive potato. It would be fun to fly at Tripoli Idaho's annual "Spud-Roc" gathering in May!


Quote:
I am glad you liked the Neptune Probe and you are welcome to use any spec of any design of mine as long as you post it.
Oh, *sure.* I *figured* there'd be a catch somewhere in there.

Actually, I looked at the NP's shrouds, which reminded me of the Estes Mars Snooper, and thought, "That design could use a SkyLab nose cone." *Then* I came up with the idea of the ST-5's and 7's mounted on the ST-10, and it was all downhill from there.


Thanks, as always, and cheers,
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"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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  #699  
Old 10-22-2006, 08:31 PM
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CPMcGraw CPMcGraw is offline
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Default

Quote:
Originally Posted by CenturiGuy
Actually, Friday at work I decided I should change the name to "Mu-Tater," and see if I could come up with a cartoon picture of a radioactive potato. It would be fun to fly at Tripoli Idaho's annual "Spud-Roc" gathering in May!


How about a radioactive Mr. Potato Head? White lab coat, pocket protector, nerdy glasses, lime-green glow, standing in front of the symbol for radiation...
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  #700  
Old 10-24-2006, 12:16 AM
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CPMcGraw CPMcGraw is offline
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Exclamation New Plan -- Argo

OK, just another simple design this time. This might even be one of my next construction projects, once I get a few current "only in their underware" jobs finished...

It's called the Argo; I wanted to hold the name Argosy off for a later project.

Length: 17.2"
Diameter: 0.908" (ST-8)
Fin Span: 4.91"
Weight: 0.99 oz

All motors reach flight velocity on a standard launch rod. Due to the high Dv rates, a parachute is not recommended. Use a 2x20 streamer instead.

A8-3.......287'......Dv 16 FPS
B4-4.......617'......Dv 23 FPS
B6-4.......623'......Dv 27 FPS
C6-5......1212'......Dv 20 FPS

Enjoy!
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