Ye Olde Rocket Forum

Go Back   Ye Olde Rocket Forum > Semroc > SVDT - Semroc Virtual Design Team
User Name
Password
Auctions Register FAQ Members List Calendar Today's Posts Search Mark Forums Read


Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 01-09-2007, 01:55 AM
CPMcGraw's Avatar
CPMcGraw CPMcGraw is offline
BARCLONE Rocketry
 
Join Date: Mar 2005
Location: Mobile, Alabama
Posts: 5,356
Default Designer's Corner

In keeping with the nature of this private development forum, I am starting this thread for posts dealing exclusively with new model rocket designs that will use some of the new motors we are anticipating from SEMROC. It should be understood that designs presented here cannot be openly discussed on the "public" side of Ye Olde Rocket Forum, as they will contain information which has not been made available to the general public. Therefore, anything presented here will NOT be posted to the BARCLONE website until after such information has been released by SEMROC, nor will it be transferred to the "Scrounged" thread for general release.

I am going to set some additional rules for this thread. While most of the designs on the public "Scrounged" thread presently follow these rules, on this thread they will have to. First: All plans must be submitted in RockSim file format. Second: Include the 2D and 3D exported images from RockSim as visual references. Third: When rendering the 3D image, set the resolution to HIGH, and fill the window with the image; we need the largest 3D image RockSim can produce. Fourth: Send the 3D image as a JPG file, not as a PNG or BMP.

As information comes in on the new motors, special motor files and component CSV files will be created and posted on this thread for exclusive advanced use by the SVDT designers. These files are not to be shared, or made publicly available. These files will also be subject to unannounced change as circumstances warrant.
__________________
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
  #2  
Old 01-09-2007, 02:46 PM
CPMcGraw's Avatar
CPMcGraw CPMcGraw is offline
BARCLONE Rocketry
 
Join Date: Mar 2005
Location: Mobile, Alabama
Posts: 5,356
Default First File -- A Pre-Production Motor File for RockSim

The following motor file was developed for testing by adapting the Apogee motors from 1/4A through B. Both 10mm and 15mm sizes have been simulated where possible. The motor power/delay curves have not been modified, but the time delay values have been added to cover a number of choices, generally beginning with 2 or 3 seconds, and going as high as 9 seconds. Some of these values will be arbitrarily high, but it allows for simulation tweaking.

Remember: These motors are for testing only, and do not necessarily represent the final production motors. It's just a starting point.

How to use:

Unzip the SEMROC.ZIP to get the SEMROC.RSE file. Save the RSE file in your DATA folder in the RockSim directory. Open RockSim. Click FILE | Reload Engines. Add the SEMROC.RSE file to the list on the right. Close this window. You can now use the SEMROC motors in your designs.
Attached Files
File Type: zip SEMROC.zip (2.5 KB, 10 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
  #3  
Old 01-09-2007, 02:56 PM
CPMcGraw's Avatar
CPMcGraw CPMcGraw is offline
BARCLONE Rocketry
 
Join Date: Mar 2005
Location: Mobile, Alabama
Posts: 5,356
Exclamation To start the show...

Here is the first BARCLONE design to use a 10mm 1/4A2-4 SEMROC motor. It is a micro version of an early MMI favorite, the Aerobee 150. This one is called the Microbee 150. It is streamer-recovery, and has spectacular performance.

Length: 9.06"
Diameter: 0.448" (Apogee 10.5mm tubes)
Fin Span: 2.188"
Weight: 0.1173 oz

1/4A2-4T......370'......Dv 6 FPS......18" launch rod

Notice the last column -- it takes only an 18" launch rod to reach safe flight velocity.

Also note, I tried to create a new ST-4 body tube for use with these motors, but RockSim declared the diameters to be only usable with 6mm MicroMaxx motors. It would not offer the 10mm motors as an option. This will be tweaked later in the program.

Study the new design and get the feel for what's in the works!
Attached Thumbnails
Click image for larger version

Name:  Microbee 150 2D.jpg
Views: 22
Size:  67.6 KB  Click image for larger version

Name:  Microbee 150 3D.jpg
Views: 29
Size:  48.8 KB  
Attached Files
File Type: rkt Microbee 150.rkt (104.7 KB, 9 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
  #4  
Old 01-09-2007, 04:00 PM
Pyro Pro's Avatar
Pyro Pro Pyro Pro is offline
Rocket Scientist
 
Join Date: Apr 2006
Location: University of Michigan
Posts: 224
Default Design #2, the Micro Hustler

Here's one I designed a few months ago. It's not designed specifically for any of the new motors (although the design could very easily be adapted), but I thought it would make a neat kit.

The Micro Hustler, a 42.65% scale model of the SLS Hustler. Uses 18mm motors, but could also be adapted to fly on 13mm or 10mm motors. Gets to about 1450' with a C6.

Length: 16.3015"
Diameter: 0.998", 0.759" (ST-9 payload section, ST-7 body)
Fin Span: 4.8751"
Weight: 0.7675 oz

1/2A6-2 . . . . . . 130' . . . . . . Dv 20 FPS* . . . . . . 36" launch rod
C6-7 . . . . . . . . 1448' . . . . . . Dv 26.6 FPS* . . . . 36" launch rod

*Both simulations are "in between" delays, a 1/2A6-3 or a C6-6 would be nice
Attached Thumbnails
Click image for larger version

Name:  MicroHustler.JPG
Views: 23
Size:  19.2 KB  Click image for larger version

Name:  MicroHustler2D.JPG
Views: 16
Size:  32.4 KB  
Attached Files
File Type: rkt MicroHustler.rkt (105.5 KB, 8 views)
__________________
David Hash
NAR#77967
http://www.Semroc.com

Last edited by Pyro Pro : 01-09-2007 at 11:18 PM.
Reply With Quote
  #5  
Old 01-09-2007, 04:39 PM
CPMcGraw's Avatar
CPMcGraw CPMcGraw is offline
BARCLONE Rocketry
 
Join Date: Mar 2005
Location: Mobile, Alabama
Posts: 5,356
Exclamation Revised Micro Hustler...

Pyro,

I modified your design (nice one, BTW...) to use the 10mm motors, with a motor mount based on 10.5mm tubes. Not too shabby results...

Hope you like how this turned out...

ADDENDUM: And no sooner than I get this posted, I discover it needs a long rod (49" long!) to become stable on this motor.

Let me try this one again on 15mm power...
Attached Thumbnails
Click image for larger version

Name:  MicroHustler v2 2D.jpg
Views: 9
Size:  72.3 KB  Click image for larger version

Name:  MicroHustler v2 3D.jpg
Views: 15
Size:  41.1 KB  
Attached Files
File Type: rkt MicroHustler v2.rkt (44.0 KB, 5 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
  #6  
Old 01-09-2007, 04:51 PM
CPMcGraw's Avatar
CPMcGraw CPMcGraw is offline
BARCLONE Rocketry
 
Join Date: Mar 2005
Location: Mobile, Alabama
Posts: 5,356
Exclamation Micro Hustler, Take III

OK, sorry about the weak design with the 10mm motor. It almost worked. The truth is, I ran into the same issue with the A2 motor I've included here. It's a weak motor for this size model.

The B2 and B7 motors are better; the B7 is perhaps the best of the three, jumping off the pad with enough velocity to get stable in 18". The B2 requires a full 36" of launch rod, so it's right at the transition.
Attached Thumbnails
Click image for larger version

Name:  MicroHustler v2 2D.jpg
Views: 11
Size:  71.0 KB  Click image for larger version

Name:  MicroHustler v2 3D.jpg
Views: 12
Size:  41.1 KB  
Attached Files
File Type: rkt MicroHustler v2.rkt (60.9 KB, 8 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
  #7  
Old 01-09-2007, 05:06 PM
CPMcGraw's Avatar
CPMcGraw CPMcGraw is offline
BARCLONE Rocketry
 
Join Date: Mar 2005
Location: Mobile, Alabama
Posts: 5,356
Default Updated Semroc Motor File [Preliminary Data]

OK, I've added some old favorites to the SEMROC.RSE file. I've cobbled the Estes 1/4A through B6 motors into 10mm and 15mm packages, and I've added these with the previous batch.

If you've already added the previous file, just replace that file with this one. If you haven't installed that first version yet, unzip this file to the DATA folder for RockSim, open RockSim, and click FILE | Reload Engines. Add this file from the left column to the right column, close that window, and you're set to go.
Attached Files
File Type: zip SEMROC.zip (5.0 KB, 8 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
  #8  
Old 01-09-2007, 05:36 PM
CPMcGraw's Avatar
CPMcGraw CPMcGraw is offline
BARCLONE Rocketry
 
Join Date: Mar 2005
Location: Mobile, Alabama
Posts: 5,356
Default Updated Semroc Motor File [Preliminary Data]

This is Version 3. Some corrections have been made to the list. These represent only the 10mm and 15mm 1/4A through B motors.
Attached Files
File Type: zip SEMROC.zip (5.3 KB, 6 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
  #9  
Old 01-09-2007, 06:15 PM
Pyro Pro's Avatar
Pyro Pro Pyro Pro is offline
Rocket Scientist
 
Join Date: Apr 2006
Location: University of Michigan
Posts: 224
Default The Saturn V

Thanks,

Well, after posting my Micro Hustler, I decided that I wanted to design something impressive to go with the 10mm motors. The first rocket that came to mind was the Saturn V, so after about 2 hours of designing (4:00 -> 5:50), it was finished. The resulting model is based on the ST-16 body tube, and flies on a cluster of FIVE 10mm motors. Since I couldn't accurately represent the shrouds around the base of the body in RockSim, I substituted ST-7 and ST-4 sized tube (but if this were to be built they would be paper or balsa parts). Other than that, it's as accurate as I could make it (including an escape tower ).

The 10mm Saturn V
Scale: 1/245.5

Length: 17.3225"
Diameter: 1.64"
Fin Span: 3.08"
Weight: 2.7451 oz (with noseweight)

(5x) 1/2A2-5 . . . . . . 470' . . . . . . . Dv 7.21 FPS . . . . . . 36" launch rod

*On the actual model, the S-II, S-IVB, SM and CM would come down horizontally on one parachute, and the S-IC first stage would come down on it's own parachute as well, which should help the descent rate and prevent damage to the upper stages.

Well, here it is:
Attached Thumbnails
Click image for larger version

Name:  10mmSaturnV2D.JPG
Views: 18
Size:  36.0 KB  Click image for larger version

Name:  10mm Saturn V 01.JPG
Views: 14
Size:  18.0 KB  Click image for larger version

Name:  10mm Saturn V 02.JPG
Views: 20
Size:  19.6 KB  Click image for larger version

Name:  10mm Saturn V 03.JPG
Views: 15
Size:  17.0 KB  
Attached Files
File Type: rkt 10mm Saturn V.rkt (92.4 KB, 10 views)
__________________
David Hash
NAR#77967
http://www.Semroc.com

Last edited by Pyro Pro : 01-09-2007 at 11:10 PM.
Reply With Quote
  #10  
Old 01-09-2007, 06:37 PM
Pyro Pro's Avatar
Pyro Pro Pyro Pro is offline
Rocket Scientist
 
Join Date: Apr 2006
Location: University of Michigan
Posts: 224
Default

Well, I was just reading over the motor thread, and saw a mention of ST-6 body tube for 15mm motors, with an OD of 0.62". That would be a more "to scale" size for the command module body (actual size is somwhere arount .65"), and could replace the current ST-5 tube.
__________________
David Hash
NAR#77967
http://www.Semroc.com
Reply With Quote
Reply


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 12:38 PM.


Powered by: vBulletin Version 3.0.7
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Ye Olde Rocket Shoppe 1998-2019