Ye Olde Rocket Forum

Go Back   Ye Olde Rocket Forum > WOOSH - Wisconsin Organization of Spacemodeling Hobbyists > WOOSH News
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 03-01-2011, 04:14 PM
Sather's Avatar
Sather Sather is offline
Entropy Demonstrator
 
Join Date: Mar 2011
Location: Northern Illinois
Posts: 120
Default ECOF events - the Jarosch Cup for 2011

Greetings. We have heard a lot of good ideas for this year's Jarosch Cup contest, and thanks to all who contributed. The trend was to move away from potentially long recovery time commitments, and while there were many good events suggested, in the words of Connor MacLeod (Highlander), "There can be only one." Suggestions that weren't used this year may be used in subsequent years, at the discretion of the then-current Cup holder. My goals this year are to encourage MAXIMUM participation while keeping it fun. I know we all shared in a huge upwelling of pride for Joe when he won the "A" triathlon at the sod field last summer, a clean, solid victory over some of the finest rocketeers in WOOSH. I therefore tried to envision a contest that included the best features of all the suggestions, one that was fun, challenging yet not overly difficult, and one that leveled the playing field for all rocketeers, whatever their certification level might be. So, here it is...

General guidelines for Jarosch Cup events

1. The Jarosch Cup is a traveling trophy, in honor and remembrance of Fred Jarosch, beloved long-time WOOSH member and avid rocketeer.
2. A rocketry contest will be held annually at the WOOSH Eat Cheese or Fly launch in August, to determine who will hold the Jarosch Cup for the following year.
3. The holder of the Cup shall be responsible for planning and hosting the contest for the following year.

The ECOF 2011 Jarosch Cup - Edam spot duration

1. In keeping with the fine Wisconsin tradition, recently adopted by Space-X, the Jarosch Cup competition, as well as ECOF in general, will remain a cheese-centric event.
2. Motors used in the 2011 Edam spot duration are limited to a maximum of 24mm diameter.
(a) larger motor mounts may be adapted down use to 24mm diameter motors.
(b) 24mm motor mounts may be further adapted down to allow the use of 18mm, 13mm or Micro Maxx motors, at the option of the flyer.
3. Rockets entered in 2011 Edam spot duration will only be flown on currently certified motors, with a maximum installed impulse of "E" motor or equivalent. (40 N-s).
(a) Flyers utilizing reloadable 24mm motors must assemble their motor on site, in the presence of a neutral adult from opening the sealed reload container until the rocket has been presented to the RSO, and must bring reload kit documentation to the RSO, to verify use of "E" motor reload.
4. There can be one rocket entered per registered flyer, and one qualifying flight per rocket. The qualifying flight will be identified in advance of said flight.
(a) Since there are no launch fees for "E" motors and below, all flyers can register individually. Family members may each make an independent / individual entry.
5. Recovery of rockets will be by streamer. A flag will be placed in the soft grass near the runway, with a 50ft circle flagged out around it.. Scoring will be by timed duration, with a spot landing bonus as follows... Three rockets, landing closest to the flag and within the flagged circle will get a time bonus. Rockets outside of the circle will not qualify for the bonus. The time bonus will be equal to 30%, 20%, and 10% of their duration time, respectively. This will be of some help to a very accurate but short flight, and much more help to an accurate, longer flight. It is up to the flyer to determine how he (she) will prioritize accuracy vs time aloft. (Think of it like shuffleboard... a well-placed flight can be used strategically.) This also avoids the apples to oranges comparison of points from the use of different scales, i.e. feet (distance from spot) and seconds (time aloft), and avoids judging official(s) spending the entire weekend trudging through miles of field to pace off each and every wayward rocket.
6. Flyer will be given a small sample of Edam cheese to fly in or attached to his (her) rocket. NOTE - While Gouda was the obvious choice for "G" powered boosters, in 2011 we will be using "E" motors and Edam cheese. I will personally smuggle sufficient quantities of this product in from Holland.
7. Duration timing will be from initial vertical movement at launch until the FIRST portion of the rocket touches ground, tree, automobile, etc.
NOTE - this is a change from "G" gouda duration, where the Gouda capsule was the only section of the rocket that was timed. The Edam capsule is still allowed to separate from the main rocket, but the grounding of either section will stop the time.
The cheese section, for those rockets that separate (intentionally or otherwise), will be the section measured for spot accuracy, regardless of which section was used for duration timing. Linear measurement will be made from the portion of the appropriate (cheese) section (rocket or streamer) closest to the flag. The entire rocket and the cheeses must be recovered and presented for scoring to qualify.
8. CHAD or any other form of multiple staging is allowed, at the option of the flyer. Bear in mind that this may impose a limitation due to the separation timing penalty in rule 7.
9. NAR Safety Code will be followed at all times. Flyer must be certified to the level of motor flown.
NOTE - Given the possibility that Jeroen at CTI comes up with an E90-Vmax (and I wouldn't put it past him), that would technically be a high power motor under NFPA 1127 para 3.3.15.1 (average thrust in excess of 80N.)

In the fun column, I would like to add my thanks to Jeff Z. for developing the original "G" Gouda duration event, which we have used now for the last 3 ECOF's. This has been a great event at ECOF, open to all rocketeers and with simple rules to keep it fun. In the design of the trophy, he also had the foresight to allow for the event to change from year to year, as sometimes changing the novelty factor can renew interest. Next time you see Jeff (and we hope it is soon), give him a pat on the back and a heartfelt thanks for all of his ground work in this important and enduringly fun contest.

Cheers. Sather

Last edited by Sather : 07-30-2011 at 07:02 PM.
Reply With Quote
  #2  
Old 03-01-2011, 04:51 PM
Rex R Rex R is offline
Craftsman
 
Join Date: Feb 2011
Posts: 473
Default

what kind of mass would the edam enclousure need to envelope? I may have just the booster for this .
rex
Reply With Quote
  #3  
Old 03-01-2011, 05:02 PM
Sather's Avatar
Sather Sather is offline
Entropy Demonstrator
 
Join Date: Mar 2011
Location: Northern Illinois
Posts: 120
Default

Quote:
Originally Posted by Rex R
what kind of mass would the edam enclousure need to envelope? I may have just the booster for this .
rex


Small wheels of cheese. I believe they weigh in the neighborhood of an ounce. Shape is malleable... i.e. can be formed into shapes as needed.
__________________
AP used in 2010: 28,044 Ns (36.9% O)
AP used in 2011: 43,488 Ns (6.2% P)
Highest altitude achieved: 21,981' AGL

"Gravity is a cruel and unpredictable mistress"
Reply With Quote
  #4  
Old 03-01-2011, 07:47 PM
Rex R Rex R is offline
Craftsman
 
Join Date: Feb 2011
Posts: 473
Default

in case anyone is curious, 1oz of cheese occupies approx 1.6 cubic inches of space .
rex
Reply With Quote
  #5  
Old 03-09-2011, 04:47 PM
chadrog's Avatar
chadrog chadrog is offline
Out to launch...
 
Join Date: Feb 2011
Location: South Milwaukee WI
Posts: 1,488
Default

Could I get a clear definition of "streamer"?
__________________
www.wooshrocketry.org NAR Sec. 558
Look us up on YouTube: http://www.youtube.com/user/guytogo75?feature=mhee
unstable by design
Reply With Quote
  #6  
Old 03-09-2011, 05:02 PM
Sather's Avatar
Sather Sather is offline
Entropy Demonstrator
 
Join Date: Mar 2011
Location: Northern Illinois
Posts: 120
Default

__________________
AP used in 2010: 28,044 Ns (36.9% O)
AP used in 2011: 43,488 Ns (6.2% P)
Highest altitude achieved: 21,981' AGL

"Gravity is a cruel and unpredictable mistress"

Last edited by Sather : 03-13-2011 at 02:02 PM.
Reply With Quote
  #7  
Old 03-09-2011, 05:08 PM
Sather's Avatar
Sather Sather is offline
Entropy Demonstrator
 
Join Date: Mar 2011
Location: Northern Illinois
Posts: 120
Default

here is another, from the NAR Pink Book...

http://www.nar.org/pinkbook/

31.2 Streamer Specifications
A streamer is defined for this event as a piece of cloth, plastic film, or paper, whose shape is approximately rectangular. The streamer must have a length- to-width ratio of five to one (5:1) or greater and have a minimum area of 100 square centimeters. The streamer and model must be connected by only a single line or cord, attached at the narrow end of the streamer. The cord may not be connected to either the streamer or the model at more than one point (e.g., no yokes are permitted). The streamer may not be cut, slit, or otherwise altered in such a manner as to affect its nature as a simple connected plane.

(I try to stay away from the Pink Book whenever possible.)
__________________
AP used in 2010: 28,044 Ns (36.9% O)
AP used in 2011: 43,488 Ns (6.2% P)
Highest altitude achieved: 21,981' AGL

"Gravity is a cruel and unpredictable mistress"

Last edited by Sather : 03-13-2011 at 02:03 PM.
Reply With Quote
  #8  
Old 03-09-2011, 05:24 PM
chadrog's Avatar
chadrog chadrog is offline
Out to launch...
 
Join Date: Feb 2011
Location: South Milwaukee WI
Posts: 1,488
Default

Fair 'nuff, thanks.
__________________
www.wooshrocketry.org NAR Sec. 558
Look us up on YouTube: http://www.youtube.com/user/guytogo75?feature=mhee
unstable by design
Reply With Quote
  #9  
Old 04-29-2011, 08:53 AM
chadrog's Avatar
chadrog chadrog is offline
Out to launch...
 
Join Date: Feb 2011
Location: South Milwaukee WI
Posts: 1,488
Default

Can't wait! Mussssst-flyyyy-cheeeeeeeeeeeese
__________________
www.wooshrocketry.org NAR Sec. 558
Look us up on YouTube: http://www.youtube.com/user/guytogo75?feature=mhee
unstable by design
Reply With Quote
  #10  
Old 05-11-2011, 09:54 AM
Sather's Avatar
Sather Sather is offline
Entropy Demonstrator
 
Join Date: Mar 2011
Location: Northern Illinois
Posts: 120
Default

Quote:
Originally Posted by Sather
Flyer must be certified to the level of motor flown.
NOTE - Given the possibility that Jeroen at CTI comes up with an E90-Vmax (and I wouldn't put it past him), that would technically be a high power motor under NFPA 1127 para 3.3.15.1 (average thrust in excess of 80N.)


Wow, I was half joking when I wrote that comment into the rules, but am now amazed after watching Mark H's flight at the sod field, using a newly-certified Cesaroni E75! Way to go, Jeroen!
__________________
AP used in 2010: 28,044 Ns (36.9% O)
AP used in 2011: 43,488 Ns (6.2% P)
Highest altitude achieved: 21,981' AGL

"Gravity is a cruel and unpredictable mistress"
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 06:25 PM.


Powered by: vBulletin Version 3.0.7
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Ye Olde Rocket Shoppe © 1998-2024