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Teams design, build, and test a mechanical device, which uses the energy from a falling mass to transport an egg along a straight track as quickly as possible and stop as close to the center of a Terminal Barrier (TB) without breaking the egg.

Regional Location
Eye Protection
Rules Location
Hands-On Day
Type B
National Rulebook
March 4, 2023

Rule 3.c. - During setup, time will be paused so students can demonstrate their mass falling without the vehicle attached. If the mass contacts the venue floor or has the potential to damage it, a construction penalty will be assessed per rule 3.c. and students will be required to launch using a VASO-provided cushion.

March 2, 2023

Rule 3.c. - The protective pad/cushion referenced in this rule is considered part of the device and must fit within the allowed Scrambler device dimensions. VASO expects it to actually protect the venue's floor from damage, not just prevent the mass from contacting the floor.

November 10, 2022

Rule 3.e. - ...The egg backstop must be built of any rigid material, and it must have a flat surface of 5.0±0.5 cm wide by 5.0±0.5 cm high by 1.27 cm (0.50”) thick 1.1 cm or thicker.

October 16, 2022

Rule 3.a. - Teams, even if they are from the same school, may NOT share an energy propulsion system (launcher) in VASO tournaments.

October 9, 2022

Rule 3.f. - Since dowels sold as “¼ inch dowels” are typically slightly narrower than that, VASO will accept dowels that measure approximately ¼ inch.

October 9, 2022

Rule 3.g. - Event Supervisors at VASO tournaments will not allow the egg to be placed inside a bag.

October 8, 2022

Add a rule 4.b.iv. - If a kit was used to build the team’s device, the Design Log must also include an explanation of at least one substantial modification made to the kit as required by the Constructed Devices Policy.

October 5, 2022

Rule 4.e. - Logs will not necessarily be returned to teams. Teams should keep their original log and submit a copy to the Event Supervisor.


Scrambler C VASO 2023 States Scoresheet
Download PDF • 108KB

VASO Scrambler Scoring Spreadsheet
Download XLSX • 844KB

Science Olympiad Personal Protective Equipment
Download PDF • 1.69MB

Scrambler Track Layout 2023

Scrambler Egg Holder and Backstop Diagram 2023

Wignut Braking System Video

Nationals 2023 General Vehicle Lessons and Tips Video

National Scrambler event page

Student Resource Center (Scioly)

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