Ye Olde Rocket Forum

Go Back   Ye Olde Rocket Forum > BARCLONE > Designer's Studio
User Name
Password
Auctions Register FAQ Members List Calendar Today's Posts Search Mark Forums Read


Closed Thread
 
Thread Tools Search this Thread Display Modes
  #21  
Old 11-05-2007, 09:54 PM
snaquin's Avatar
snaquin snaquin is offline
The_Ripper
 
Join Date: Jun 2005
Location: Louisiana
Posts: 1,440
Default

Quote:
Originally Posted by CPMcGraw
Obviously, there are some important exceptions to such a rule. Can anyone remember if the Apogee Newsletter ever covered this topic?


I don't remember it being covered in the Apogee Newsletter and I usually do read the articles that deal specifically with RockSim. I may have overlooked it though. I may email Tim and see if he can shed some light on this feature. I had an entry for an EMRR virtual rocket contest that had a transition and reverse transition close to the nose cone and remember not being able to figure out why the calculations were so far off. I wasn't aware of this feature at the time so I trashed the design and went another direction.

.
__________________
Steve Naquin
TRA# 677 L2
NAR# 85518 L2
SAM# 0052
Reply With Quote
  #22  
Old 11-05-2007, 09:57 PM
snaquin's Avatar
snaquin snaquin is offline
The_Ripper
 
Join Date: Jun 2005
Location: Louisiana
Posts: 1,440
Default

Quote:
Originally Posted by CPMcGraw
Nice going, Steve! Those coupons do come in handy for "special" purchases...

Translation: She can use 'em, too...

Now I can run the sim over again and get a more accurate profile...

The altitude came to 1138' with a slightly reduced Dv, down to 24 FPS, when burning the D12-5.

Interesting outcome with the C11-5. I get 565' with a Dv of 8 FPS. That's a really nice, clean flight with low velocity over the top.

Both motors seem to need a 48" x 3/16" rod with this bird, as they take at least 33" of guide length to reach flight V. An extra 12" wouldn't hurt.

What I really want is a "D" bird that Dv's below 10 FPS, and still gets off easily on a 36" rod. This one comes close, but I want the next one to be a little quicker on the launch.


Craig,

I did get a little progress on the 24mm AV Booster tonight. Engine mount is finished and mounted with kevlar shock cord anchor and fins are cut and covered with label paper and edges sealed with CA. I would normally use a Semroc ST-13 baffle but I'm trying to get it built to paint this weekend since our next launch is on Nov. 17 and I want to fly it at least a few times.

.
Attached Thumbnails
Click image for larger version

Name:  BARCLONE 24mm AstroVision Booster.jpg
Views: 301
Size:  212.9 KB  
__________________
Steve Naquin
TRA# 677 L2
NAR# 85518 L2
SAM# 0052

Last edited by snaquin : 11-05-2007 at 10:15 PM.
Reply With Quote
  #23  
Old 11-06-2007, 11:31 AM
CPMcGraw's Avatar
CPMcGraw CPMcGraw is offline
BARCLONE Rocketry
 
Join Date: Mar 2005
Location: Mobile, Alabama
Posts: 5,355
Exclamation New Plan -- 24mm AstroVision Booster #2

Here's the second design for a 24mm "D" power booster for the AstroVision package. My goals were to create something that could get off the pad on a 36" rod, and pop-the-top with a moderate Dv. I think this design meets those goals. If it looks vaguely familiar, then understand that some designs just can't be improved upon, just adapted...

Length: 18.30"
Diameter: 1.375" (AV base diameter)
Fin Span: 3.34"
Weight: 2.27 oz

D12-7......1350'......Dv 18 FPS......36" x 3/16" launch rod (only needs 30")

The flight from GL to deployment is 8.2 seconds.
Attached Thumbnails
Click image for larger version

Name:  Booster #2.jpg
Views: 300
Size:  36.9 KB  Click image for larger version

Name:  Booster #2 Plan View.jpg
Views: 276
Size:  69.7 KB  
Attached Files
File Type: rkt Booster #2.rkt (135.3 KB, 259 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
Reply With Quote
  #24  
Old 11-13-2007, 08:11 PM
CPMcGraw's Avatar
CPMcGraw CPMcGraw is offline
BARCLONE Rocketry
 
Join Date: Mar 2005
Location: Mobile, Alabama
Posts: 5,355
Exclamation New Plan -- Snark

This one is a "Schoolyard Sounder".

Snark is a simple "Tau-styled" model with incredible performance on 13mm A3-4 motors. This is very likely going to be my next prototype!

Length: 18.27"
Diameter: 1.04" (BC-760)
Fin Span: 2.42"
Weight: 0.93 oz

A3-4T......460'......Dv 5.5 FPS......36" standard rod

Enjoy!
Attached Thumbnails
Click image for larger version

Name:  Snark 2D.jpg
Views: 270
Size:  62.7 KB  Click image for larger version

Name:  Snark.jpg
Views: 324
Size:  33.0 KB  
Attached Files
File Type: rkt Snark.rkt (40.9 KB, 263 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
Reply With Quote
  #25  
Old 11-14-2007, 09:52 PM
Tau Zero's Avatar
Tau Zero Tau Zero is offline
Incurable SEMROC Fan
 
Join Date: Mar 2005
Location: Twin Falls, Idaho, USA
Posts: 1,966
Thumbs up "*Dude!* That's TAU Snarky!"

Craig,

This one definitely looks very "Snarky!" (No Apogee Components reference intended! )


Quote:
Originally Posted by CPMcGraw
Snark is a simple "Tau-styled" model with incredible performance on 13mm A3-4 motors. This is very likely going to be my next prototype!
(BEAVIS AND BUTT-HEAD VOICES) "Heh heh, heh heh. He said, 'Tau-styled.' --That was *cool.*"

(DUDE, WHERE'S MY CAR? VOICES) "*Dude.* -- *Sweet.*"


Cheers,

--Jay
__________________
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
Reply With Quote
  #26  
Old 01-05-2008, 10:06 PM
James Pierson James Pierson is offline
Master Modeler
 
Join Date: Dec 2005
Location: Washington State
Posts: 654
Lightbulb New Design: Cap Ship

Now that is it 2008 look like we need to bring this thread back on top. Lately I have added all of the Semroc Classic tubes and balsa transitions to my database and my parts options have doubled. Still have yet to get around to the Centering Rings files. I also need to update alot of early designs using the Maximum Frontal Diameter and other necessary changes in the next year.

The bad news is that Tranquility 1 will need a slight redesign. Only found this out after it was built. There is a problem with the lower retaining cup that hold the pods. I use a 1/2 inch piece of ST-16 and the pods fit just fine, however there is no room for a streamer once they are wraped around the pods. The fix will be to change the ST-16 to an ST-18 and replace all the lower fins . This give enough room for the streamer and a little extra for easy deployment. This is called learning the hard way .

Here is a ring fin design that I call the Cap Ship. It was inspired by a vintage cap toy that I saw on ebay. It uses 1 inch section of ST3030 which are about 3.6 iches in diameter.

Enjoy and Thanks Again, JP

Cap Ship (18mm)
Launch guide length: 36.0000 In

MOTOR.................MAX. ALTITUDE...........DEP. VELOCITY
A8-3..................152.30348 Ft.............14.5008 ft/s
B4-4..................382.48360 Ft..............5.1734 ft/s
B6-4..................389.86549 Ft..............3.6389 ft/s
C6-5..................867.97244 Ft..............1.8969 ft/s

James Pierson
NAR# 77907
Attached Thumbnails
Click image for larger version

Name:  Cap Ship 3D Image #2.jpg
Views: 284
Size:  19.3 KB  Click image for larger version

Name:  Cap Ship 3D Image #1.jpg
Views: 307
Size:  20.6 KB  Click image for larger version

Name:  Cap Ship 2D Image.jpg
Views: 263
Size:  23.5 KB  
Attached Files
File Type: rkt Cap Ship Dmmy Fins.rkt (68.9 KB, 254 views)
Reply With Quote
  #27  
Old 01-06-2008, 07:30 AM
CPMcGraw's Avatar
CPMcGraw CPMcGraw is offline
BARCLONE Rocketry
 
Join Date: Mar 2005
Location: Mobile, Alabama
Posts: 5,355
Default Design Count

As I continue working on the website update, I am watching the number of designs gradually inching upward as I 'discover' some additional designs posted on the forum that were somehow overlooked. So, I thought I'd share these numbers with you for encouragement...

In the PROVENS category, we have 413 designs, the most recent being James Pierson's Cap Ship.

In the CONCEPTS category (designs that have either not been sufficiently debugged, or cannot be simulated with RockSim) we have 41 entries.

This brings us up to 454 designs at the start of 2008. Can we make this number cross 500 before the end of the year? I think it's possible!

Also remember, now that we're into the new year, the "Scrounged...2007" thread is closed for new posts. All new submissions need to be posted here in the Designers Studio.

I'm looking forward to seeing what develops here!
__________________
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
Reply With Quote
  #28  
Old 01-13-2008, 01:28 AM
Tau Zero's Avatar
Tau Zero Tau Zero is offline
Incurable SEMROC Fan
 
Join Date: Mar 2005
Location: Twin Falls, Idaho, USA
Posts: 1,966
Talking Laser Wolf -- Another mutated design

I did this one back in August, and sent it to Craig (so it may already count as a 2007 BARCLONE design) , but I unearthed it again this week. I sent propaganda to JP and BillE, but apparently I didn't share it with the rest of the forum until now.

From the Can't Leave Well Enough Alone Department, this is,

"A collision between Wolverine #0861 and Laser Torpedo #1311 -- Upscaled to 1.68X."


Any comments or suggestions (aside from, "So, tell us about these voices you hear in your head" ) are welcome.


Cheers,
Attached Thumbnails
Click image for larger version

Name:  LaserWolf_01.jpg
Views: 256
Size:  130.0 KB  Click image for larger version

Name:  LaserWolf_02.jpg
Views: 259
Size:  138.5 KB  Click image for larger version

Name:  LaserWolf_00.jpg
Views: 353
Size:  149.1 KB  
Attached Files
File Type: rkt LaserWolf_24mm.rkt (73.0 KB, 262 views)
File Type: tif LaserWolf_01.tif (154.8 KB, 256 views)
File Type: tif LaserWolf_02.tif (90.6 KB, 246 views)
__________________
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
Reply With Quote
  #29  
Old 01-13-2008, 06:22 PM
CPMcGraw's Avatar
CPMcGraw CPMcGraw is offline
BARCLONE Rocketry
 
Join Date: Mar 2005
Location: Mobile, Alabama
Posts: 5,355
Default

Quote:
Originally Posted by CenturiGuy
I did this one back in August, and sent it to Craig (so it may already count as a 2007 BARCLONE design) , but I unearthed it again this week. I sent propaganda to JP and BillE, but apparently I didn't share it with the rest of the forum until now.

From the Can't Leave Well Enough Alone Department, this is,

"A collision between Wolverine #0861 and Laser Torpedo #1311 -- Upscaled to 1.68X."


Any comments or suggestions (aside from, "So, tell us about these voices you hear in your head" ) are welcome.


Cheers,


AKA "Laserene"...

Be sure to look at those "launch guide lengths" in the sim sheets. Both the C11 and the D12 require 48" x 3/16" rods. The E9 takes 47 out of 48, so you need a 60" rod or tower.

I still like the design. "She jus' needs more power, Capt'n..."

...And as for those voices, you might try a few generous doses of " PF Dark Side" and "AP Valid Path". (Now there's a combination of music: A Valid Path to the Dark Side...)
__________________
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
Reply With Quote
  #30  
Old 01-13-2008, 07:37 PM
James Pierson James Pierson is offline
Master Modeler
 
Join Date: Dec 2005
Location: Washington State
Posts: 654
Thumbs up Laser Wolf on Diet

Looks great Jay, however after a closer look the Laser Wolf is a bit heavy as Craig has suggested. Its also way overstable. Both heavy and overstable are to blame for the take off speeds and launch rod length required.
Might concider the following:
Change from Nylon to plastic chute (Nylon Heavy)
Upper fins to 1/16" thickness
Other fin to 3/32" thickness
Reduce large lower fins size by 25% or so
Reduce length of upper BT-60

Hope this is helpful, and don't worry, I have to do the design diet thing all the time with my freaky design. .

James Pierson
NAR# 77907
Reply With Quote
Closed Thread


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump



All times are GMT -5. The time now is 12:58 AM.


Powered by: vBulletin Version 3.0.7
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Ye Olde Rocket Shoppe © 1998-2018