The Argonia Cup Challenge
The goal for the 2024 Argonia Cup is to launch a two-stage rocket containing any number of golf balls as a payload in the sustainer to the highest altitude possible. The sustainer must not exceed 45,000’ AGL. Both stages of the rocket must recover safely and in flyable condition.
- There must be at least one (1) TRA certified Level 2 member per team. This team member must be present at the competition and will be considered the flyer of record of the rocket. All team members must currently be enrolled at the competing university or college. Team members accessing the high-power pad area must be members of the Tripoli Rocketry Association. Multiple teams from the same university or college are permitted.
- The maximum total installed impulse for this competition will be 5,120.0 Newton Seconds. All motors must be commercially certified motors. Spark emitting motors (Skidmark type motors) are prohibited.
- A commercially manufactured and tested altitude recording altimeter with onboard data storage shall be used for altitude determination. If two or more altimeters are used, the averaged apogee height of each altimeter will be used for determination of rocket apogee.
- Ignition of the sustainer motor will utilize commercially manufactured electronics capable of inhibiting sustainer ignition if the flight is not vertical. See sustainer Motor Inhibit Logic section below for details.
- All motor igniters shall be installed at a safe location out on the range. Any team found installing ignitors in the team camp/spectator area will be disqualified.
- Rockets shall be launched at an elevation angle between 90 and 85 degrees (vertical to 5 degrees off vertical). All flights will be angled away from the flight line regardless of wind direction.
- All rockets must have a minimum of a 5:1 thrust to weight ratio at liftoff.
- Launch configuration flight stability shall be achieved by maintaining a minimum CP/CG static margin of no less than 1 body caliber during flight.
- All launch vehicle components must be recovered in a “re-flyable condition” after flight. Zippers in the body tube, loose fins, stripped parachutes are all disqualifying.
SUSTAINER MOTOR INHIBIT LOGIC
Sustainer motor ignition will be inhibited in the event the flight is not vertical. This can be done
in one of two ways.
1. Use flight computers capable of inhibiting sustainer motor ignition based on tilt angle.
- Examples include the Altus Metrum Telemega and EasyMega. Other devices also exist which can sense tilt angle and use this information as a check prior to igniting the upper stage.
- The following logicals should all be true before firing the upper stage:
- Tilt angle less than 20 degrees.
- Velocity greater than 200 ft/sec
2. Time/altitude lockout
- Devices without tilt measurements are allowed, but should follow the following guidelines:
- Velocity greater than 200 ft/sec
- Time since liftoff less than (intended staging time + 2 sec)
- Altitude greater than (75% of the intended staging altitude)
The sustainer recovery system should be sized to allow a safe descent of the sustainer in the event that it does not ignite. Keep in mind that unburned propellant will make the rocket heavier. A descent rate of no more than 35 ft/sec will be allowed under the main parachute with an unburned rocket motor.
Teams will be required to submit sustainer ignition logic information for approval 30 days before the competition.
Each team will be required to produce a video (six (6) minutes or longer, hosted on YouTube) introducing each member of the team and providing a detailed overview of the project with an emphasis on the payload recovery system. This video must be submitted to the launch organizers on or before February 23, 2024.
Team information, detailed rocket description, flight simulations and sustainer logic information must be submitted to the contest committee by February 23, 2024. The information submission form can be found here. Failure to submit this information will be grounds for disqualification.
- TRA Unified Safety Code will be followed for all launch activities. Any team member accessing the launch pad area must be a member of TRA.
- The launch organizers will provide all launch pads, launch rails, and the launch control system. All rockets must utilize 1.5” x 1.5” (commonly known as 1515) rails. The rails provided will be 12’ in length. A minimum of two (2) rail guides must be used.
- All rockets will be subjected to a rocket safety inspection before the teams will be cleared to fly their projects. Any safety of flight issues noted in this inspection will be resolved before flight. These safety inspectors have the final say regarding any project’s suitability for flight.
- The flight score for this competition will be as follows:
Score = ApogeeSustainer * (n⁄10 +1)
Where n is the number of golf balls contained in the sustainer of the rocket.
- Teams must supply all golf balls they intend to use in the competition. All golf balls must conform to USGA specifications and cannot be modified in any way.
- The minimum number of golf balls flown is one.
- Competition golf balls may only be loaded under the supervision of the contest appointed safety monitor.
- Only golf balls flown and recovered in the sustainer will be considered for scoring.
- Any altitude 45,000’AGL or higher will be disqualifying.
- All rockets must be presented to the scoring table by 4:45PM on Sunday, March 24, 2024. Flights returned after this time will be disqualified.
What safety rules will be in effect during the Argonia Cup?
The Argonia Cup is conducted under the Tripoli Rocketry Association Unified Safety Code. Each teams certified flyer must be at least a Level 2 TRA member.
Will teams be allowed to fly using a non-team members (mentor) certification basis?
All teams must have at least one (1) student that is a Tripoli Rocketry Association (TRA) member and is certified Level 2 by TRA. The certified flyer must bring a state issued ID and their TRA membership card to the launch.
Will non-certified team members be allowed to access the launch pads?
All team members who wish to access the high power pads must be a member of TRA.
Are aluminum rockets legal for the competition?
Rockets launched at the Argonia Cup may not be constructed of all aluminum or any other metals. Aluminum fin cans or nose cones will be permitted only if required to ensure structural integrity of the rocket during a high-performance launch. Absolutely no aluminum airframes or fins attached directly to motor cases will be permitted under any circumstances. Any metal structural components (i.e. nosecones, nosecone tips, fins, or fin cans) must be painted. NO EXCEPTIONS! Screws, rivets, nuts, washers, and other non-structural small components are exempt from this restriction.
Is the 30 FPS descent velocity just in the vertical plane?
Can I fly my drone at the competition to video my team?
You can fly your drone at the Argonia Cup as long as you follow the following rules:
1. You must keep your drone below 400’AGL at all times.
2. You cannot fly over the crowd or on the crowd side of the safety fence.
3. You must launch and recover your drone from the active range side of our safety fence and if your drone is equipped with a “return to home” capability the home waypoint must be on the active side of the safety fence.
4. Do not fly in close proximity to any team as they are preparing their rocket for flight. Drones can be a distraction and the noise they make may distract the teams at a very crucial time.
Sign up now and start competing!
Each team will be required to produce a video six minutes or longer, hosted on YouTube, introducing each member of the team and providing a detailed overview of the project. This video must be submitted to the launch organizers a minimum of thirty (30) days before the launch. Not submitting a video will result in disqualification.
Now that you have joined the competition, please submit video here once you have completed your video!