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RockSim Virtual Rocket Contest #5
CONTEST - IS OVER!
Contests:   All   Previous   Next

Essence's Model Rocketry Reviews (EMRR) is happy to introduce the fifth "virtual" rocket contest. But this time, there is a new sheriff in town. For the first time, Nick will not be the judge. Bob Cox has volunteered to be the first of a series of guest judges. Nick will continue to host the results on EMRR and will recruit the prizes from the generous sponsors, but now he can compete.

Every good contest needs a theme, and since football season is getting into full swing, a football-lofting contest seems appropriate. Your goal is to design a rocket that will launch a regulation-size football on various missions.

So, grab your copy of RockSim (or the Demo version) and build a rocket that meets the requirements below and the "virtual flying" contest will take place on November 6, 2004.

Contest Requirements:

  • RockSim Owners: Entry must be (1) RKT files (any version)
  • RockSim DEMO Entries: Entry must include the following:
    • All the information from the Parts List
    • A drawing of your fins
    • Thickness of your fins (material is in Parts List)
    • Location of your fins with reference to the rear of the rocket in inches
    • Please contact Bob Cox beforehand for tips on submitting demo entries
    • Demo entries may require follow-up questions from the judges to ensure that what we judge is an accurate copy of what you intended
  • Name your Rocket
  • Contestants may only have (1) entry
  • Contestants must be on EMRR's Announcement List to be eligible
  • Build Bonus: Bonus points will be gained if you build, fly and produce pictures of the rocket:
    • +1 point for picture of the rocket static
    • +1 point for picture of the rocket launching or descending
  • Newbie Bonus: To encourage new contestants, bonus points will be awarded to first- and second-time contestants
    • +1.6 points for first-time entrants
    • +0.5 points for second-time entrants
  • Early Bird Bonus: To reduce log-jams near the contest deadline contestants, early entrants will receive bonus points, based on the time they submit a qualified design.
    • +0.9 points for first entrant
    • +0.8 points for second entrant
    • etc. to 0.1 points for 9th entrant
    • No early bird bonus during final week, regardless of order of entry
  • Entries must be received by 11/6/2004. A contestant whose entry does not meet the contest guidelines will be notified and allowed to re-submit a corrected entry. Please submit your entries early to ensure that you will have time to make corrections if necessary. This is especially important for RockSim demo entries.
  • Contest will take place from 11/7 - 11/12.

CLICK HERE FOR Q A

CLICK HERE FOR Fine Print

RockSim Rocket Design Requirements:

  • Motor Configuration:
    • Designer's choice (staged, cluster, or single)
    • Total impluse allowed must be <162 Newton Seconds (e.g. single G motor, 8-D's, 1-F+2-E's, etc.)
    • These are valid Motors and Curves (virtual5.eng)
      (if you need assistance loading these, e-mail EMRR)
    • No manual modification of the .eng file
    • Motor overhang will be the default 0.5 inches unless told otherwise.
    • If you use a Booster, the following are allowable Booster Motors:
      • Booster 24mm - C11-0, D12-0, E9-0
      • Booster 18mm - C6-0 or B6-0
      • Booster 13mm - A10-0
      • · Upper stage engines must be Quest or Estes -or- include a 2 oz mass object to represent the in-flight ignition system
  • Misfires:
    • The Engine Misfire option on the Competition Settings tab will be enabled as follows:
      • Rare (1%) for black-powder engines (Estes or Quest)
      • Common (10%) for composite engines (Aerotech) ·
      • Mixtures of composite and black-powder will use the 10% setting
    • Simulations that have a misfire but do not leave the pad will be allowed one retry.
  • Payload:
    • The rocket must carry a fully-inflated regulation-size football, using one of these options:
      • (A) Football Enclosed: Start with this RockSim file (FootballA.rkt). You may modify the football holder, but you may not shrink the inside dimensions of the football compartment. You may not reduce the mass of the football mass object.
      • (B) Football Half-Exposed: Start with this RockSim file (FootballB.rkt). You must provide a housing that will (in the referee's opinion) enclose and support the lower half of the ball. You may not reduce the length, thickness, diameter, or mass of the exposed portion of the football. You may not reduce the mass of the football mass object/
      • (C) Football Exposed: Start with this RockSim file (FootballC.rkt). You must provide a housing that will (in the referee's opinion) enclose and support the ball.
      • * NOTE: These rkt files are created in RockSIM 5. They will work with the Demo version and all later versions.
    • You may not reduce the length, thickness, diameter, or mass of the football. You may not puncture the football to support it.
    • No manual modification of the .rkt files
  • Body Tubes:
    • At least three different diameters of body tubes must be used on the exterior of the rocket as airframes; the football enclosure may count as one
    • Each of the three airframe body tubes must be at least 2 times longer or shorter than the other airframe body tubes. Additional body tubes beyond three do not need to follow the 2X length rule
    • Diameters must be standard tube sizes (selected from RockSim Database)
  • Fins:
    • There must be at least 2 sets of 2 - 8 fins.
    • One set must have at least twice the semi-span -or- twice the root length of the other.
    • At least one fin set must be a Custom Design with at least 7 corners (include leading and trailing edges). Corners closer than ¼" to each other are allowed but do not count toward the required number (the idea is to have interesting shapes and not just rounded corners).
    • Fins can not be any thinner than 1/4" of an inch if balsa, cardboard, or paper, or 1/8" if stronger material
    • RockSIM 7x asymmetrical fins are allowed
    • Tube fins and ring fins are allowed, but must have both their mass and drag accounted for. (see how-to article)
  • Materials must be standard weights that are in the Rocksim database
  • Materials must be standard thicknesses that are in the Rocksim database
  • Must include realistic recovery and launch lugs (motor hook is optional)
  • NO CP Overrides
  • NO Mass Overrides (other than those in the standard RockSim database)
  • NO additional Mass Objects for adjusting weight and CP
    • Allowed Mass Objects are the football, realistically sized/weight shock cord, eye-screws, motor hook, etc.
  • Must have at least 1 caliber of stability (RockSim Based) when loaded with your selected motor(s)
  • Appearance:
    • Select the rocket part colors that your would like to see posted. Make it look like your favorite professional or college team. If you want, you may use the "decal" feature of RockSim 7.04 to display team logos on your rocket. (see here - PDF)
  • Specifics:
    • You must choose your motors for each Event
      • Motor selection must match motor tube size; no adapters and no masking tape allowed
      • All motor tubes must have a motor assigned to them for each flight
    • You must select your 48" rod angle, no more than +/- 30 degrees, for most events. Be sure to give the proper "plus" or "minus" sign indication. If no sign is specified, we will assume you wanted "minus", into the wind.

Contest Events:

  • · Your rockets will participate in (6) events and will accumulate a total score. All events will use a 48" launch rod and your choice of motor configuration (different for each event). For many events, you must also choose a launch rod angle, no more than +/- 30 degrees. Thermals are disabled, but engine misfires and lost models are a real possibility.
    1. Pass Attack: (See Results) As quarterback, the pressure is on you to get the ball thrown quickly, as far as you can, but don't leave it floating where it can be intercepted. Wind Conditions will be set to Light (3-7 MPH) with Some Variability (0.04), No Thermals. Placement score will be based on a combination of:
      1) Fastest to clear launch rail (sec)
      2) Shortest time to landing (sec)
      3) Longest Upwind Range (farthest from pad in feet).
      Hint: Lots of tradeoffs here. Bigger engines will get you up quickly and will get you more range, but may leave you in the air too long.
    2. Gentle Touch: (See Results) Get the ball to your receivers as gently as possible. The objective is to attain the lowest Velocity at Deployment. Your rocket will fly in RockSim 7 default conditions [Wind Conditions: Calm (0-2 mph), Wind Turbulence: Fairly Constant Speed (0.01), Cloud Coverage: No Thermals].
      Hint: Choose an engine with a good delay, then tweak your mass and drag to get the gentlest deployment. Small engines are easier to tweak.
    3. Punt: (See Results) The punter's objective here is to get the longest hang time without drifting out of bounds (300 feet). Wind Conditions will be set to Light (3-7 MPH) with Some Variability (0.04), No Thermals. Placement score will be hang time in seconds.
      Hint: Angle hard into the wind. Use big engines and big parachutes, but not too big or you'll drift out of bounds.
    4. Field Goal: (See Results) As a field goal kicker, you need to have accurate range. You will have 2 flights, one with the wind, one against the wind. Your rocket will fly twice in RockSim 7 default conditions [Wind Conditions: Calm (0-2 mph), Wind Turbulence: Fairly Constant Speed (0.01), Cloud Coverage: No Thermals]. For the first flight, you will try to land exactly 300 feet upwind, and for the second, 300 feet downwind. Placement score will be sum of the distance mismatches (feet).
      Hint: Choose your angles and engines wisely. A smaller parachute will make you less susceptible to wind variability, but may hurt you in other events.
    5. Hail Mary: (See Results) There may come a time when you just have to throw the ball as hard as you can and hope for the best. The objective is to have the highest altitude and a safe landing without drifting out of bounds (300 feet). Your rocket will fly twice in RockSim 7 default conditions [Wind Conditions: Calm (0-2 mph), Wind Turbulence: Fairly Constant Speed (0.01), Cloud Coverage: No Thermals]. The first flight will be with the officially sized and weighted football. For the second flight, the football will be replaced by a "contest" * object. The placement score will be a combination of the Altitude for the two flights.
      Hint: Light weight, low drag, lots of impulse, and not too much parachute.
    6. Eye-Candy: (See Results) Your rocket will be voted on to determine the best looking. This event will count much less than the other events, and will mainly be used as a tie-breaker.
  • DQ Conditions
    • Descent/Landing must be < 20 feet/sec vertical
    • Any of the Competition Settings
  • DQ Results
    • No results for just that event (you will get 1 point in the placement score)
    • Lost rocket is only lost for that event

* NOTE: All "contest" settings and entries will not be disclosed until all entries are in!

  • Submission Checklist
    • RockSim RKT file
    • Rocket Name
    • Motor and rod angle selections for Events below:
Event Motor
Selection
Rod Angle
Passing Attack _________ - 30 Degrees
Gentle Touch _________ 0 Degree
Punt _________ (+/-) ____ Degree
Field Goal
    (upwind)
    (downwind)

_________
_________

(+/-) ____ Degree
(+/-) ____ Degree
Hail Mary _________ (+/-) ____ Degree

PRIZE TABLE:

Alf
Anonymous Guest
CD
(1) Estes Black Brant II
Apogee Components
Apogee Components
CD
(1) Complete RockSim Software Package
(If you have it, give this to a friend, or get a Free Update to version 8 when released)
[Picture]
Art Applewhite Rockets
UFO Picture Any Style Flying Saucer of your choice of design up to a 29mm motor mount.
JonRockets
JonRocket.com
$20 $20 Gift Certificate for something of your choice!
Link Out $10 One $10 Gift Certificate for something of your choice!
Logo
RocketFlite
Pic One complete Electric Match Package:
1- ML-KIT *PLUS* Choice of (2):
1-bag of ML-12
1-bag of ML-24
1-bag of ML-48
1-bag ML-72
Logo
Rocket Guts
$10 One $10 Gift Certificate for something of your choice!

Final Results:

E
N
T
R
Y
#
Rocketeer Rocket Name P
O
I
N
T
S
(1)
Passing
Attack
(2)
Gentle
Touch
(3)
Punt
(4)
Field
Goal
(5)
Hail
Mary
(6)
Eye
Candy
Bonuses
Newbie
Early
Bird
8 Dave Austerberry Husker Pride 45.9 10 10 4 5 9 6 1.6 0.3
7 Doug Gardei Pig Skin Odyssey 2004 40.1 10 7 1 7 7 8 0 0.1
3 Jeff Caldwell Viking Destroyer 39.5 6 5 8 10 4 4 1.6 0.9
9 Jim Myers Pigs Ear 35.4 5 8 1 8 10 3 0 0.4
4 Bruce Levison Brown's Orange Bowl 34.6 1 3 6 9 6 9 0 0.6
6 Chan Stevens Flyin' Fightin' Irish 34.2 8 1 10 1 8 6 0 0.2
2 Todd Mullin Hawkeye 33.3 4 6 5 4 3 10 0.5 0.8
5 Claude Paquin Oblivious Bomber 30 4 2 9 2 5 7 0.5 0.5
1 Nathan Schoenkin Rocket in Pocket 3 24.7 2 9 7 3 1 2 0 0.7
10 Clive Davis Don't Quit Your Day Job 23 8 4 1 6 2 2 0 0

Wrap-Up

Well, that was a lot of work, but I had fun, and I hope the contestants did too. I was surprised to see how well the newcomers did, finishing 1st and 3rd against some high-caliber competition. I hope they, like all the contestants, enjoyed the experience and will come back again for future contests.

Misfires: If I had it to do all over again, I think I would have listened more closely to Doug's advice and dropped the 10% misfire rate for composites. For the contestants who used composites, the contest tilted too heavily in favor of luck over skill. The contestants who tried to avoid the composite misfire problem by using only BP engines hurt themselves in the high-performance events.

Effect of Bonus Points: My goal for the bonus points was not to distort the competition unfairly, but to give just a tiny edge to encourage new entrants, and to avoid a flood of entries at the end of the contest. The newbie bonuses proved to be unnecessary as the newbies had large enough margins that their bonuses were not needed. The early-bird bonus did not flip any results either, bit did act as the tie-breaker between 5th and 6th place. The early-bird bonus did its job, resulting in 9 of the 10 designs meeting the early date and reducing the work near the deadline.

EMRR: We'd like to thank Bob for being the first brave one to run a virtual contest on EMRR. I personally ran out of time to be able to participate, due to getting the calendar ready and many other important activities. Bob ran a good contest and I loved finally seeing the designs. Congratulations to all for participating.


ROCKETEER NAME OF ROCKET ROCKSIM FINAL
STANDING
#8 - Dave Austerberry Husker Pride image 1
Length=36.3"
Weight=25.4 oz
Motor=29mm
DragCo=0.067
image
Dave's high finish in Events 1, 2, and 5 allowed him to build such a big lead that could ride through a double-misfire on event 3. The only thing more surprising than winning as a newbie is doing it with a single-engine design.
#7 - Doug Gardei Pig Skin Odyssey 2004 image 2
Length=26.5"
Weight=17.8 oz
Motor=18mm x6 + 24mm x1
DragCo=0.128
image
Doug got a first-place finish in one event and finished in the top 4 of every event except the Punt, where a DQ cost him dearly.
#3 - Jeff Caldwell Viking Destroyer image 3
Length=55.0"
Weight=66.0 oz
Motor=29mm x2
DragCo=0.172
image
Another newcomer, Jeff finished 1st in the Event 4, 3rd in Event 3, and managed to stay out of trouble on all the others. He managed to do all this even though he had the heaviest design entered.
#9 - Jim Myers Pigs Ear image 4
Length=44.0"
Weight=19.8 oz
Motor=24mm x3
DragCo=0.123
image
Jim scored one 1st and two 3rds. Without the DQ in Event 3, he could have been a contender.
#4 - Bruce Levison Brown's Orange Bowl image 5
Length=41.5"
Weight=27.3 oz
Motor=
Booster:24mm x2
Sustainer:24mm x2
DragCo=B: 0.089; S: 0.075
image
Bruce pulled off two 2nd place finishes, and avoided misfires by using only BP engines. That cautious decision probably hurt him in the Events 1 and 5.
#6 - Chan Stevens Flyin' Fightin' Irish image 6
Length=42.0"
Weight=25.8 oz
Motor=18mm x5 + 29mm x1
DragCo=0.138
image
Chan got bit hard by the misfire monster, and it really cost him in two events. Without those, he would have been in contention for first place.
#2 - Todd Mullin Hawkeye image 7
Length=51.0"
Weight=57.4 oz
Motor=24mm x3
DragCo=0.177
image
Todd blew away the competition in the Eye Candy event, but it was not enough to overcome the flight performance penalty of his heavy design.
#5 - Claude Paquin Oblivious Bomber image 8
Length=50.5"
Weight=45.4 oz
Motor=
Booster:24mm x5
Sustainer:24mm x1
DragCo=B: 0.124; S: 0.084
image
Claude did well in the punt but an apparent miscalculation in the Field Goal cost him dearly.
#1 - Nathan Schoenkin Rocket in Pocket 3 image 9
Length=56.2"
Weight=55.6 oz
Motor=18mm x8
DragCo=0.167
image
Nathan's heavy design did great in the Gentle Touch event, but that weight hurt him in the other events.
#10 - Clive Davis Don't Quit Your Day Job image 10
Length=63.4"
Weight=64.6 oz
Motor=29mm x2
DragCo=0.130
image
Clive got off to a promising start in the first two events, but was never able to recover from a DQ in Event 3.

Pass Attack:

E
N
T
R
Y
#
Rocketeer Rocket Name P
O
I
N
T
S
Engines Vland DQ? R
N
K
Tclear R
N
K
Thang R
N
K
Range T
O
T

R
A
N
K
1 Nathan Schoenkin Rocket in Pocket 3 2 8xD12-3 -11.3 No 2 0.354 3 33.2 2 -36 7
2 Todd Mullin Hawkeye 4 3xE30-4 -18.0 No 7 0.209 5 25.5 3 -80 15
3 Jeff Caldwell Viking Destroyer 6 2xF20EJ-4 -18.6 No 5 0.282 10 10.6 4 -562 19
4 Bruce Levison Brown's Orange Bowl 1 2XD12-0, 2xD12-3 -29.2 Landing 0 0.487 0 6.7 0 -696 0
5 Claude Paquin Oblivious Bomber 4 5xE9-0, C11-5 -14.8 No 4 0.304 4 30.1 7 -982 15
6 Chan Stevens Flyin' Fightin' Irish 8 3xA8-5+2xD21-7+G80-13 -19.0 No 10 0.153 2 59.9 9 -1585 21
7 Doug Gardei Pig Skin Odyssey 2004 10 E30-10+6xA8-none -11.4 No 9 0.184 9 10.9 6 -975 24
8 Dave Austerberry Husker Pride 10 G40-13 -17.7 No 8 0.208 6 25.4 10 -2602 24
9 Jim Myers Pigs Ear 5 3xD12-7 -15.3 No 3 0.349 8 14.4 5 -708 16
10 Clive Davis Don't Quit Your Day Job 8 2 F25-6 -16.5 No 6 0.279 7 15.2 8 -1082 21

In the Passing Attack event, we had three ties: 1st place, 3rd place, and 7th place. Nobody had any misfires, and only one person DQ'ed.

Fastest Time to Clear Launch Rail: There is a clear distinction between composite engines and black powder. The top 6 finishers all used composites; the bottom 4 all used BP.

The slow launch really hurt Bruce. He did not reach the minimum safe speed until he was almost 20 feet up, and by then the wind had turned him nearly horizontal. His parachute opened only 11 feet from the ground, not soon enough. Crunch - DQ!

The three fastest models in the composite group were the three lightest and the three slowest were the heaviest. Despite being twice as heavy, Todd came within 0.001 second of 3rd place because of the large amount of thrust.

Lots of thrust helps too. Chan augmented the butt-kicking G80 with a pair of D21's, the power-house in the18mm category. Doug had a good strategy here with the cluster of A8 engines - lots of thrust to get off the pad, but short duration to keep the altitude down for a quick landing. Chan and Doug had the thrust/weight ratios far higher than everybody else, and it clearly showed in their takeoff times.

Shortest Time to Landing: For this portion, the idea was to eject close to the ground and use a small chute. Here is where Chan's light weight and high thrust hurt him. Even with a 13 second delay, he ejected a long way up and ended up drifting for almost twice as long as the next slowest guy. Jeff deployed at 83 feet and came in 1st; Doug's short burn and long delay helped him come in 2nd despite reaching a much higher altitude.

Farthest Upwind Range: Ejecting close to the ground to minimize drift helps in this portion. Dave dominated in this portion, landing nearly half a mile upwind. The slow burn and the long coast on the G40-13 allowed him to travel a long way but eject low enough that the wind didn't blow him very far back. Clive also had a nice lob with a good low ejection and little drift-back.

Gentle Touch:

E
N
T
R
Y
#
Rocketeer Rocket Name P
O
I
N
T
S
Engines DQ? Vdeploy
1 Nathan Schoenkin Rocket in Pocket 3 9 8xC11-3 No 1.232
2 Todd Mullin Hawkeye 6 2xF21-4+1xE9-4 No 4.506
3 Jeff Caldwell Viking Destroyer 5 G35EJ-4+F20EJ-4 No 6.974
4 Bruce Levison Brown's Orange Bowl 3 2xD12-0, 2xC11-3 No 9.866
5 Claude Paquin Oblivious Bomber 2 5xD12-0, D12-3 No 11.131
6 Chan Stevens Flyin' Fightin' Irish 1 4x1/2A6-4+A8-5+F50T-6 Yes none
7 Doug Gardei Pig Skin Odyssey 2004 7 D12-3+2x1/2A6-none+
2xA8-none+2xB6-none
No 3.491
8 Dave Austerberry Husker Pride 10 G38EJ-7 No 0.327
9 Jim Myers Pigs Ear 8 3xC11-3 No 2.008
10 Clive Davis Don't Quit Your Day Job 4 2x F50-6 No 9.503

After grabbing 1st place in Event #1, Dave repeated the feat by nailing 1st place in Event #2. Nathan and Jim grabbed the next two spots, both using C11-3's. Bruce and Claude struggled with their two-stage designs, which seem to be hard to tune for this event.

A bizarre thing happened in this event. Chan had a misfire on his central F50 engine. The cluster of tiny 18mm engines was just enough to lift him off the rail and flop onto the ground, where the chute deployed at zero velocity.

Now, how should this count? Give it first place since the velocity was exactly 0.0? Disqualify it since the chute never opened? Re-fly it? Since this was not covered by the rules, I polled the contestants without letting them know who the unlucky victim was. The overwhelming response was to count it as a DQ. To use Chan's own words against him, "Flights that do not deploy the chute should be DQ'd, regardless of other metrics. That's a clear violation of NAR safety code, and not something we'd want to reward, even in virtual world." Besides, this event was called Gentle Touch, and there is nothing gentle about flopping to the ground under thrust. DQ.

Punt:

E
N
T
R
Y
#
Rocketeer Rocket Name P
O
I
N
T
S
Engines Angle Range Misfire? DQ? Thang
1 Nathan Schoenkin Rocket in Pocket 3 7 8xD12-3 -30 -140.9 No No 33.315
2 Todd Mullin Hawkeye 5 3xF21-4 -4 217.5 Yes No 26.92
3 Jeff Caldwell Viking Destroyer 8 2xF50-6 -10 -69.2 No No 41.66
4 Bruce Levison Brown's Orange Bowl 6 2xD12-0, 2xD12-5 3 102.3 No No 27.674
5 Claude Paquin Oblivious Bomber 9 5xE9-0, C11-3 -15 164.6 No No 54.144
6 Chan Stevens Flyin' Fightin' Irish 10 3xD21-7+2x1/2A6-4
+G35EJ-7
-22.5 -163.0 Yes No 88.187
7 Doug Gardei Pig Skin Odyssey 2004 1 E15-10+6xD21-none -30 -415.9 No Range  127.7
8 Dave Austerberry Husker Pride 4 F20EJ-4 -12 0 Twice Misfire 0
9 Jim Myers Pigs Ear 1 3xE9-8 -10.5 527.4 No Range  75.4
10 Clive Davis Don't Quit Your Day Job 1 G38EJ-4, F20EJ-4 -10 351.3 No Range 40.6

Here's the event where the Bad Luck Fairy really worked her magic. Four misfires and three DQ's.

With the variable winds and the small landing field, this event becomes a gamble - go for big hang time and risk landing out of bounds, or play it safe by staying lower.

Doug went for the glory and got burned. He had an incredibly long hang time, but he was angled so far into the wind that he still landed out of bounds on the upwind side: DQ! A little bit stronger wind and he would have been fine.

Jim and Clive both caught a little too much wind and landed out of bounds downwind: DQ! DQ!

Chan went for the high power and got away with it. Even though he had a misfire on one of his small engines, he still managed to come in first.

Claude jammed as much BP as he could into his (remember, BP keeps the Copperhead monsters at bay), and netted 2nd place.

Todd would have been next, but one of his F21's misfired, costing him half his hang time.

Jeff maxed out the power with a pair of F50's to come in 3rd place.

Dave is the only guy using a single-engine design. Those pesky misfires shouldn't bother him, right? Wrong. The first flight attempt misfired and did not leave the pad. Okay, according to the rules he gets a free re-try. Second attempt, another misfire. Argh!!! The odds of that happening are 100:1, yet it still happened. Stupid Copperheads!

Well, how should this be scored? Once again, the audience was asked their opinion without knowing who the victim was. Responses varied widely from those who wanted to grant a double-secret re-flight to those who wanted to DQ. In the end, this was treated as a zero-duration flight, which qualifies for last place among the valid flights, ahead of the DQs.

Field Goal:

E
N
T
R
Y
#
Rocketeer Rocket Name P
O
I
N
T
S
Downwind Upwind Total
1 Nathan Schoenkin Rocket in Pocket 3 3 120.7 65.0 185.7
2 Todd Mullin Hawkeye 4 88.2 39.6 127.9
3 Jeff Caldwell Viking Destroyer 10 9.5 4.1 13.5
4 Bruce Levison Brown's Orange Bowl 9 15.5 11.5 27.0
5 Claude Paquin Oblivious Bomber 2 137.5 152.1 289.7
6 Chan Stevens Flyin' Fightin' Irish 1 299.2 49.5 348.7
7 Doug Gardei Pig Skin Odyssey 2004 7 25.7 14.7 40.4
8 Dave Austerberry Husker Pride 5 17.4 76.4 93.8
9 Jim Myers Pigs Ear 8 7.0 23.1 30.1
10 Clive Davis Don't Quit Your Day Job 6 0.003 46.2 46.2

Upwind:

E
N
T
R
Y
#
Rocketeer Rocket Name Engines Angle Misfire? DQ? Range Mismatch
1 Nathan Schoenkin Rocket in Pocket 3 8xD12-3 -30 No No -365.0 65.0
2 Todd Mullin Hawkeye 3xF21-4 -16 Yes No -260.4 39.6
3 Jeff Caldwell Viking Destroyer 2xF23-4 -18.7 No No -295.9 4.1
4 Bruce Levison Brown's Orange Bowl 2XD12-0, 2xD12-3 -10 No No -288.5 11.5
5 Claude Paquin Oblivious Bomber 5xD12-0, D12-3 -27 No No -452.1 152.1
6 Chan Stevens Flyin' Fightin' Irish 5x1/2A6-4+F20EJ-7 -10.33 No No -349.5 49.5
7 Doug Gardei Pig Skin Odyssey 2004 D12-5+6xA8-none -23 No No -285.3 14.7
8 Dave Austerberry Husker Pride F20EJ-4 -15 No No -376.4 76.4
9 Jim Myers Pigs Ear 3xD12-5 -17 No No -276.9 23.1
10 Clive Davis Don't Quit Your Day Job 2x F20EJ-4 -18 No No -346.2 46.2

Downwind:

E
N
T
R
Y
#
Rocketeer Rocket Name Engines Angle Misfire? DQ? Range Mismatch
1 Nathan Schoenkin Rocket in Pocket 3 8xD12-3 30 No No 420.7 120.7
2 Todd Mullin Hawkeye 3xF21-4 8 Yes No 211.8 88.2
3 Jeff Caldwell Viking Destroyer 2xF23-4 17.6 No No 309.5 9.5
4 Bruce Levison Brown's Orange Bowl 2XD12-0, 2xD12-3 9 No No 284.5 15.5
5 Claude Paquin Oblivious Bomber 5xC11-0, C11-3 20 No No 162.5 137.5
6 Chan Stevens Flyin' Fightin' Irish 5x1/2A6-4+F20EJ-7 7.25 Yes No 0.8 299.2
7 Doug Gardei Pig Skin Odyssey 2004 D12-3+6xA8-none 25 No No 325.7 25.7
8 Dave Austerberry Husker Pride F20EJ-4 9 No No 317.4 17.4
9 Jim Myers Pigs Ear 3xC11-5 28 No No 293.0 7.0
10 Clive Davis Don't Quit Your Day Job 2x F23EJ-4 15 No No 300.0 0.003

Jeff grabbed first place in the event with two great flights both under 10 feet from the target. That is enough to pull him into first place overall.

Bruce got second place in this event. Ever since that disastrous landing in the first event, Bruce has gotten better in every subsequent event.

Clive had an amazing second flight, landing within less than inch of the target.

On the upwind flight, Todd had a misfire on one of his F21 engines, but it didn't hurt him too bad, causing him to land only 39 feet short. On the downwind flight, Todd got another misfire, this time landing him 88 feet short.

Chan has been on a real roller-coaster. First he was up, scoring 3rd place in the first event. Then he was down after DQ'ing in the second event. Up again after nailing first in event #3. Now it's time to go back down. On the downwind leg of this event, Chan had a misfire on his central F20 engine. Just like the Gentle Touch event, the little booster engines were just enough to lift him off the rod and plop him on the ground, 299 feet short of the goal. If we had been using a 5-foot rod, he never would have left the rod and would have been able to re-fly. Bummer.

I'm not sure what happened to Claude here. On both flight he landed about 150 feet too far upwind. It almost looks like he practiced with the wong wind speed when he was choosing his launch angles.

Hail Mary:

E
N
T
R
Y
#
Rocketeer Rocket Name P
O
I
N
T
S
Engines Angle Misfire? Reg.
Altitude
Nerf
Altitude
Total
Altitude
1 Nathan Schoenkin Rocket in Pocket 3 1 8xD12-3 0 No 471 558 1028.72
2 Todd Mullin Hawkeye 3 3xF21-4 0 Nerf 845 519 1364.59
3 Jeff Caldwell Viking Destroyer 4 2xF50-6 1 No 714 841 1555.37
4 Bruce Levison Brown's Orange Bowl 6 2xE9-0, 2xE9-4 1 No 1257 1824 3081.18
5 Claude Paquin Oblivious Bomber 5 5xE9-0, C11-7 -5 No 1047 1354 2401.62
6 Chan Stevens Flyin' Fightin' Irish 8 2xD21-7+2xA8-5+B6Q-4+G40-13 -4.2 No 1946 2201 4146.75
7 Doug Gardei Pig Skin Odyssey 2004 7 E15-10+6xD21-none -5 Nerf 2169 1528 3696.82
8 Dave Austerberry Husker Pride 9 G80-10 -5 No 1879 2305 4184.11
9 Jim Myers Pigs Ear 10 3xF21W-8 -4.5 No 2181 2252 4432.28
10 Clive Davis Don't Quit Your Day Job 2 2x F50-6 0 Reg. 196 954 1150.19

This was the high altitude event. For the first flight, the regulation 14.5 oz football was launched. For the second flight, the regulation football was replaced by a Nerf football of the same size but only 6.5 oz in mass. All regulations regarding landing speed, out-of-bounds, and stability margin were enforced only for the first flight. Everybody landed at a safe speed and in-bounds, so there were no DQ's. There were three misfires, though.

  • Jim claimed first place in the event by logging the highest altitude on the regulation flight and second highest on the Nerf flight.
  • Dave got second place by flying the highest Nerf flight and 4th highest regulation flight. This performance is especially impressive since he only used 116 Ns of impulse, well below the 152-162 Ns used by most other competitors.
  • Chan came in third, just behind Dave.
  • Doug had a misfire on the Nerf flight. He still posted a respectable 1528 foot flight, but the misfire that cost him about 670 feet, and slipped him from 2nd place to 4th.
  • Todd misfired on the Nerf flight. That was his fourth misfire in five events.
  • Clive misfired on his first flight.

This was the event where weight was most important. The lightest designs performed best and the heavier designs did worst. Those who used composites did quite a bit better than those of the same weight who used only black powder engines, provided they did not misfire.

Eye-Candy:

E
N
T
R
Y
#
Rocketeer Rocket Name Votes Vote
Points
P
O
I
N
T
S
1 Nathan Schoenkin Rocket in Pocket 3 3 5 2
2 Todd Mullin Hawkeye 16 38 10
3 Jeff Caldwell Viking Destroyer 7 11 4
4 Bruce Levison Brown's Orange Bowl 12 28 9
5 Claude Paquin Oblivious Bomber 11 23 7
6 Chan Stevens Flyin' Fightin' Irish 7 14 6
7 Doug Gardei Pig Skin Odyssey 2004 14 27 8
8 Dave Austerberry Husker Pride 6 14 6
9 Jim Myers Pigs Ear 2 6 3
10 Clive Davis Don't Quit Your Day Job 3 5 2

No question about the winner of this event. Todd's Hawkeye dominated in total votes, first place votes, and weighted vote points. The next three places were all tightly bunched together, and the late votes allowed Bruce to squeak past Doug by one vote point.


QA

  • If we submit a design and it doesn't qualify for some reason, are we allowed to rework the design and resubmit or even submit a new design?
    • Yes, either, both...we will review them and let you know.
  • How are Contest Points scored?
    • Each of the first 3 events have a "placement score" described. That placement score will then be reversed ranked by the total number of entries. This will give the maximum number of points to the winner in the event. For example, if there are (4) entries and in contest #2 (maximum altitude) and entry #1 gets 800 feet, #2 810 feet, #3 750 feet and #4 950 feet. Then the scores will be 2 points for #3, 3 points for #1, 1 point for #2 and 4 points for #4.
  • You say materials must be those listed in RockSim ... can I build/design any part using those materials?
    • Yes, you may, except the body tubes which must come from the database. Other parts: this does not imply that you have to take the part from the database.
  • The field is awfully small …
    • Yes, it will be challenging to keep it within the field on the high-altitude events. I did get rid of the thermals though, which should make your practice flights act a lot more like the official flight. Also, please note that the 300 foot range limit is only in force on Events #3 (Punt) and #5 (Hail Mary). For the Punt, angle into the wind to overcome the drift. The wind is calm for the Hail Mary event, so drift will be much less of a problem.
  • The engine failure rate is awfully high …
  • It looks realistic to me. If you have a misfire on a single engine, I will give you one re-try. If you have a misfire on a multi-engine, then I hope you designed your rocket to tolerate that.
  • You also have an ignition delay specified but do not include igniter variability for Drag Races, why did you do that?
    • It is a default, but unless the igniter box is checked the delay time is not activated.
  • Aren't the RockSim 5 and 6 users going to be upset about not being able to use the RockSim 7 variations?
    • The point here is that everyone can compete. Their submissions will be converted to RS 7 for the competitions. They will miss out on some testing and the asymmetrical fin capability, but like in life, some compete with better training facilities than others... doesn't mean better facilities make for winners.
  • I've downloaded the virtual5.eng file. How do I get RockSim to ONLY use those motors and ignore the other motors or other .eng files?
    • Put the ENG file in the DATA directory for RockSIM
    • Run Compile Engine program
    • Select only virtual3.eng and ---> move it over
    • Click Compile
    • Start RockSIM
  • NO CP or Mass overrides. But... are the CP and mass overrides present for database objects OK? i.e. I select an Estes NC, or eye-hook that has entered a CP and mass override, is that OK?
    • Yes, Database CP's okay.
  • In staging composite motors for the contest file, does one need to include "virtual electronics," i.e. staging timers?
    • Yes. Use a 2 oz mass object.
  • Delayed Ignition: Are we allowed to use non-zero ignition delays (air starts)?
    • No
  • Drag coefficient: Should we use the default Cd (0.75 for sustainer, 0.78 and 0.80 for boosters), or should we calculate Cd at simulation time?
    • Calculate at Simulation Time. Also, it will be set to "Use the Rocksim Simulation equation in simulations".
  • "There must be at least 2 sets of 2 - 8 fins". Does that mean 'per stage'? If my design is a two-stage (i.e. booster and sustainer), and each has a set of fins, does that satisify the design criteria?
    • Yes
  • You said "all exterior tubes must be at least 2 times longer or shorter than any other exterior tube." Does this mean "all other exterior tubes", or does it mean "an other exterior tube?"
    • This same question came up in a previous contest, and the ruling then was "all". This time we are changing the ruling. Three of the tubes must meet the 2x length requirement, but additional tubes do not. For example, a valid design could have tubes of length 5", 10", and 20". An additional tube that is 4" long would be allowed, even though it is not 2X the size of any other tube.
  • You did not specify no thermals (Like you did for 1 - 3) for event 4 or 5. I assumed that you wanted their default settings which is Sunny 0-10%.
    • Nope. Thermals blow, so they are disabled for ALL the events.
  • I keep getting recovery system failures, especially on the Passing Attack event.
    • Yes, this will be be a common problem on some events. Unlike previous contests, a recovery system failure will not disqualify the flight.
  • I didn’t see anything about dual deployment (i.e. drogue chute and main chute). Is that allowed?
    • No, you must use the "Deploy at engine ejection" option.
RockSim

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