Amateur rocketry, sometimes known as experimental rocketry or amateur experimental rocketry, is a hobby in which participants experiment with fuels and make their own rocket motors, launching a wide variety of types and sizes of rockets. Amateur rocketeers have been responsible for significant research into hybrid rocket motors, and have built and flown a variety of solid, liquid, and hybrid propellant motors.
History
Amateur rocketry was an especially popular hobby in the late 1950s and early 1960s following the launch of Sputnik, as described in Homer Hickam's 1998 memoir Rocket Boys.
One of the first organizations set up in the US to engage in amateur rocketry was the Pacific Rocket Society established in California in the early 1950s. The group did their research on rockets from a launch site deep in the Mojave Desert.
In the summer of 1956, 17-year-old Jimmy Blackmon of Charlotte, North Carolina, built a 6-foot rocket in his basement. The rocket was designed to be powered by combined liquid nitrogen, gasoline, and liquid oxygen. On learning that Blackmon wanted to launch his rocket from a nearby farm, the Civil Aeronautics Administration notified the U.S. Army. Blackmon's rocket was examined at Redstone Arsenal and eventually grounded on the basis that some of the material he had used was too weak to control the flow and mixing of the fuel.
Interest in the rocketry hobby was spurred to a great extent by the publication of a Scientific American article in June 1957 that described the design, propellant formulations, and launching techniques utilized by typical amateur rocketry groups of the time (including the Reaction Research Society of California). The subsequent publication, in 1960, of a book entitled Rocket Manual for Amateurs by Bertrand R. Brinley provided even more detailed information regarding the hobby, and further contributed to its burgeoning popularity.
At this time, amateur rockets nearly always employed either black powder, zinc-sulfur (also called "micrograin"), or rocket candy (often referred to as "caramel candy") propellant mixtures. However, such amateur rockets can be dangerous because noncommercial rocket motors may fail more often than commercial rocket motors if not correctly engineered. An appalling accident rate led individuals such as G. Harry Stine and Vernon Estes to make model rocketry a safe and widespread hobby by developing and publishing the National Association of Rocketry Model Rocket Safety Code, and by commercially producing safe, professionally designed and manufactured model rocket motors. Currently, NAR forbids amateur rocketry at their launches, only allowing certified motors, but Tripoli allows homemade motors, which they designate as research motors, to be flown at their launches.
As knowledge of modern advances in composite and liquid propellants became more available to the public, it became possible to develop amateur motors with greater safety. Hobbyists were no longer dependent on dangerous packed-powder mixtures that could be delicate and unpredictable in handling and performance.
The Reaction Research Society conducts complex amateur rocket projects, utilizing solid, liquid, and hybrid propellant technologies. The Tripoli Rocketry Association sanctions some amateur activities, which they call "research rocketry," provided certain safety guidelines are followed, and provided the motors are of relatively standard design.
Projects such as Sugar Shot to Space attempt to launch rockets using "rocket candy" as a propellant.
Records An amateur spaceshot refers to a rocket launch by non-commercial / non-military entities that successfully reached or exceeded the Kármán line (100 km / 328,084 ft), the internationally recognized boundary of space. +Successful Amateur SpaceshotsDateOrganizationVehicleLocationMaximum Altitude (AMSL)Maximum VelocityCommentsApril 30, 2026 Ethan Kosoof (NZRA)Meraki IIIMt White Station, New Zealand111 Km2,075 m/s Current velocity record-holder. Lowest impulse to space < 53,000 N-s April 18, 2026 USC Rocket Propulsion Laboratory (USCRPL)Daybreak Black Rock Desert, NV, USA102 km 1,433 m/s First amateur payload mission.April 19, 2025 Ethan Kosoof (NZRA)Meraki IIMt. White Station, New Zealand122 km1,664 m/s October 20, 2024 USC Rocket Propulsion Laboratory (USCRPL)Aftershock IIBlack Rock Desert, NV, USA143 km 1,610 m/s Current altitude record-holder.April 21, 2019 USC Rocket Propulsion Laboratory (USCRPL)Traveler IV Spaceport America, NM, USA104 km1,513 m/s
First successful student spaceshot.May 17, 2004 Civilian Space eXploration Team (CSXT)GoFastBlack Rock Desert, NV, USA116 km1,530 m/s First successful amateur spaceshot.
Common propellants Amateur rocketeers use a variety of propellants. The most common ones are rocket candy, and Ammonium perchlorate composite propellant (APCP). Rocket candy is a composite propellant made by mixing some form of sugar, often sucrose, sorbitol, dextrose, and fructose, with potassium nitrate. APCP is typically made with a powdered metal (typically aluminum), HTPB, and various burn rate catalysts.
Amateur liquid rocketry There are many organizations (most collegiate) actively developing and launching amateur liquid rockets. None, however, have flown past the Kármán line. Liquid-propellant powered rockets require highly complex, precise, and expensive systems; as such they are less accessible for the average rocketry hobbyist than their solid-motor counterparts. Collegiate programs benefit from corporate sponsorships and fundraising efforts to meet these needs. The danger of hazardous and/or cryogenic rocket fuels and oxidizers add to this difficulty.
Amateur liquid rockets often employ RP-1/Jet-A (kerosene) or ethanol as fuel; and many use liquid oxygen or nitrous oxide as oxidizers. They often use blow-down, pressure-fed propulsion systems to pressurize propellants for the sake of simplicity, but some organizations are actively researching electric or gas-generator cycle pumps.
+Highest Amateur Liquid Rocket LaunchesDateOrganizationVehicleApogee (AGL)PropulsionCommentsAugust 20, 2026 Waterloo Rocketry (UW)Polaris19.4 kmEthanol/Nitrous Oxide, self-pressurizing Recovered World record for highest apogee of an amateur liquid rocket World record for highest apogee of a recovered amateur liquid rocket Successfully demonstrated active roll control with canardsApril 11, 2026 Yellow Jacket Space Program (GT)Vespula17.2 kmRP-1/Liquid Oxygen, controlled pressure-fedUnrecovered Held world record from April 11, 2026 to August 20, 2026April 16, 2023 Rocket Development Lab (ERAU)Deneb14.5 kmJet-A/Liquid Oxygen, blow-downUnrecovered Held world record from April 16, 2023 to April 11, 2026May 15, 2026 Yellow Jacket Space Program (GT)Felicette14.4 kmIsopropyl Alcohol/Nitrous Oxide, self-pressurizingUnrecovered World record for highest apogee of an amateur liquid rocket without a nosecone World record for highest apogee of an amateur nitrous/IPA rocketAugust 21, 2025 Waterloo Rocketry (UW)Aurora11.6 kmEthanol/Nitrous Oxide, self-pressurizingUnrecoveredJune 20, 2026 Project Sunride (UoS)Black Mamba10.0 kmIsopropyl Alcohol/Nitrous Oxide, self-pressurizingUnrecovered World record for highest amateur regeneratively cooled engine First amateur dual pass regeneratively cooled flight engine Currently holds the European Liquid Altitude RecordApril 19, 2025 SDSU Rocket ProjectAetherios9.3 kmEthanol/Liquid Oxygen, pressure-fed UnrecoveredJanuary 20, 2024Yellow Jacket Space Program (GT)Darcy II9.2 kmIsopropyl Alcohol/Nitrous Oxide, self-pressurizingJune 15, 2024 Project Sunride (UoS)Desert Winds8.2 kmIsopropyl Alcohol/Nitrous Oxide, self-pressurizingUnrecovered First liquid-fuelled rocket launched by a UK student teamMarch 18, 2023 UCLA Rocket ProjectPhoenix6.8 kmIsopropyl Alcohol/Liquid Oxygen, blow-downRecovered Held world record from March 18, 2023 to April 16, 2023March 16, 2025 Rocket Development Lab (ERAU)Deneb 2: Electric Boogaloo6.4 kmJet-A/Liquid Oxygen, blow-downRecovered with damageAugust 6, 2022 Yellow Jacket Space Program (GT)Darcy I6.1 kmIsopropyl Alcohol/Nitrous Oxide, self-pressurizingAugust 20, 2024 Waterloo RocketryBorealis5.9 kmEthanol/Nitrous Oxide, self-pressurizingRecovered First bi-liquid designed, built, and flown in CanadaMay 29, 2021 UCLA Rocket ProjectAmbition5.8 kmIsopropyl Alcohol/Liquid Oxygen, blow-downRecovered Held world record from May 29, 2021 to March 18, 2023November 1, 2025 Walter LohmuellerSun Eater5.6 kmIsopropyl Alcohol/Nitrous Oxide, blow-downFully Recovered Highest High School built and flown liquid rocket Solo projectMarch 1, 2025 Space Enterprise at Berkeley (UCB)Eureka II4.9 kmPropane/Liquid Oxygen, pressure-fedMarch 29, 2025 Boston University Rocket Propulsion Group (BU)Icarus3.9 kmLiquid bipropellant
Regeneratively cooled thrust chambers Since 2016, some collegiate organizations have tackled significantly harder challenges by designing reusable thrust chamber utilizing regenerative cooling. Student competions like Race2Space have been specifically focusing on static fire testing of regeneratively cooled thrust chambers designed by students. Even though many chamber have been hotfired, because of the added complexity of the challenge, very few have been integrated into a launch vehicule for flight. +Liquid bi-propellant regeneratively cooled engine flightsDateOrganizationVehicleApogee (AGL)PropulsionChamber materialCommentsAugust 19, 2026 SIRIUS (UdS)Zenith3.9 kmIsopropyl Alcohol/Nitrous Oxide, self-pressurizingAluminum alloy (3D printed) Recovered nominally First Canadian regeneratively cooled engine to fly everJune 20, 2026 Project Sunride (UoS)Black Mamba10.0 kmIsopropyl Alcohol/Nitrous Oxide, self-pressurizingAlSi10Mg (3D Printed)Unrecovered World record for highest amateur regeneratively cooled engine First amateur dual pass regeneratively cooled flight engine Currently holds the European Liquid Altitude RecordApril 19, 2025 SDSU Rocket ProjectAetherios9.3 kmEthanol/Liquid Oxygen, pressure-fedGRCop-42 (3D printed) UnrecoveredOctober 14, 2024 WARR Rocketry (TMU)EX-4B1.7 kmEthanol/Liquid OxygenUnknown (3D printed) Recovered nominally on drogue chute First european cryogenic bi-propellant rocketJune 15, 2024 Project Sunride (UoS)Desert Winds8.2 kmIsopropyl Alcohol/Nitrous Oxide, self-pressurizingAluminum alloy (3D printed)Unrecovered First liquid-fuelled rocket launched by a UK student teamMay 14, 2023 Michigan Aeronautical Science Association (MASA)Clementine2.4 kmRP-1/Liquid Oxygen, blow-downCopper linner with aluminum jacketRecovered, ballistic descent Largest american student-built rocketFebruary 1, 2020 San Diego State University Rocket Project (SDSU RP)Lady Elizabeth4.0 kmMethane/Liquid Oxygen, blow-downUnknownRecovered nominally First student team in the world to successfully launch and recover a methalox rocketMay 1, 2016 Students for the Exploration and Development of Space at UC San Diego (UCSD)Vulcan I1.2 kmRP-1/Liquid Oxygen, blow-downInconel 718 (3D printed)Recovered, crash at landing First student team in the world to successfully fly a rocket powered by a 3D printed engine
Notable events
On May 17, 2004, Civilian Space eXploration Team (CSXT) successfully launched the GoFast rocket which achieved the first officially verified flight of an amateur high-power rocket into space, achieving an altitude of 116 km (72 mi).
Prior to that, the Reaction Research Society on November 23, 1996, launched a solid-fuel rocket, designed by longtime member George Garboden, to an altitude of 80 km (50 mi) from the Black Rock Desert in Nevada.