Ping Pong Parachute Bottle Rocket Launcher

Marimo Laboratories Ping Pong Parachute Launcher (P3L) for Indoor Air Bottle Rockets intended for the Science Olympiad event. No official affiliation or endorsement.
Version 0.02 with some v0.03 parts
Cambridge, MA USA
Open Community License v1.1 - GAtt v1 - Micro v1

Ping Pong Parachute Launcher (P3L)

Early public beta. No guarantees for anything and documentation is sketchy. Be careful. Please read the disclaimer at the bottom of this page. Based on the Marimo Labs Water Rocket Launcher. 

Build Instructions and Parts List

• See Article here: Ping Pong Parachute Launcher v0.02 Build Instructions

• Partial non-printed parts kit available here

Questions?

Please head over to the Article where the most updated discussion will be.

Safety Disclaimer

Pressurized systems are inherently dangerous.

Adult supervision is always required.

Any kits are made available for convenience and are not warranted for suitability for a particular purpose. Design or manufacturing defects may exist. A responsible supervising adult must make a determination of whether your particular combination of printed and non-printed parts, ground anchoring systems, bottles, hoses, pressurizing systems, personal protective equipment, protocols, users, and environment are safe for your application. 

The launcher must be firmly anchored to the ground for use. Never point at anyone or anything. No one should ever have any body parts above a pressurized bottle, as the bottle may disengage unexpectedly at any time and cause injury. Heat may cause deformation of parts and all parts should be inspected before every use.

Your use of these models or information or kits indicates your agreement to accept full responsibility and liability for use and hold harmless Marimo Laboratories LLC and its employees and affiliates for injury, death, property damage, loss of income or function or any other damages associated with the use of models or information. No warranty or guarantees are made regarding the safety, performance, or completeness of any designs, models, instructions, or analyses presented.

Changelog

2026-11-01: Core Extension v0.03 uploaded. Optional. Targeting dimensional match of SciOly STL for NERDS launcher retrofit.
2026-10-24: Cores updated to v0.03 of Core17S. PPP rules specify a "standard neck height from flange to bottle's opening of under 1.6 cm" which is measured to the near side (bottom side, in rocket orientation). This corresponds to the standard PCO-1881 Bottle Neck Finish commonly used in the US. Since the rules exclude longer necks (older PCO-1810 21mm), compatibility with longer necks can be excluded for P3L. Retaining ring is no longer needed on v0.03.
2026-10-20: v0.02 posted