Tag Archives: static fire

MTA Launch Event, 2024-09-07

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by Dave Nordling, RRS.ORG

The Reaction Research Society held a launch and firing event to honor the memory of Richard Garcia. His wife, Jeannie Riddles, his brother, Russell, and his aunt and cousin were present to witness the events of that day at our Mojave Test Area. I served as the pyrotechnic operator in charge with Dimitri Timohovich and Leanna Lincoln serving as my apprentices for the several operations we conducted that day with our membership and invited guests. RRS president, Frank Miuccio, was also present for this important event.

The safety briefing was given to all in attendance at 11AM with special recognition given to our honored guests. The weather was very hot (105F) which is typical for early September, but under low winds and a few high clouds.

We had several very different projects that day with many of our members coming to demonstrate their current projects and some bringing new builds. RRS member Jerry Fuller and his daughter Charlotte were also present that day.

Dimitri and Leanna mixed a batch of micrograin from the new zinc stock and our existing sulfur supplies. Chase Lang had a standard alpha and Bill Nelson a standard beta for launch. Both conducted safe loading operations in the RRS loading area.

With everyone under cover and passing air and road checks, the launch of the alpha still showed some of the initial low thurst stalling during firing before exiting the launch rail and being recovered downrange. The beta fired but showed an even lesser performance not managing to generate enough thrust to even leave the launch rail. Both rockets were returned for examination. Most likely cause is excessive moisture absorption into the sulfur, but that is under debate. Clumpiness of the powdered oxidizer was noticed during the mixing operation but a propellant sample burn beforehand showed no problems. it was thought that the tumbling process would be sufficient to homogenize and dry it out. Sulfur is not expensive and the society may consider buying fresh stock and improving the storage conditions.

Fourth year UCLA graduate student, Nick Kuenning, and his advisor, Prof. Mitch Spearrin, were present with a few UCLA Rocket Project members to static fire their new portable rig at the MTA. The main objective was to demonstrate the new oxidizer tank they added and run a prior engine design to check out the whole system. The test also served to show just how far UCLA has come in the many years since the liquid rocket program began at UCLA. Richard Garcia was one of the first RRS members to help UCLA in their early days of the Rocket Project. I attended UCLA PDR’s and CDR’s with him. Nick was just a freshman at the time. It was very generous of the UCLA team to conduct this firing in Richard’s honor during the last of the summer quarter when few students were back from vacation. The crew of four ran a clean and steady full-duration burn of their ablative lined engine on an impinging ethanol and LOX injector used with prior success. The burn went a full duration of 20 seconds with clean startup and shutdown. It is a very nice static fire rig and will give the team many opportunities to continue developing better engines. Nick is planning to speak at the RRS monthly meeting to share their results.

Mike Kramer and John Tsohas came to the RRS MTA as guests. Mike and John fired a few hybrid rockets that day and later joined as members. John had fired with the RRS several years ago and it was good to welcome him back. They had several successful launches and recoveries with the nitrous oxide loading and firing rig they brought.

Bill Inman brought the latest version of the Solar Cat which he and RRS member Dale Talcott built. The Solar Cat is a steam rocket mobile launcher that uses a parabolic reflector type of solar furnace for heating. It is an impressive piece of engineering with the ability to track the sun’s position in the sky and reach steam pressures up to 465 psig before moving the rocket tube into a vertical firing position. It is operated remotely and uses common off the shelf hardware.

After some considerable setup period the day prior in the northern expanse of the MTA, sun conditions that day were inconsistent however after 3:30pm a break in the clouds allowed a one hour period of insolation sufficient to reach adequate steam pressure for launch. Launch ended up not occurring as there was a mechanical snagging problem with one of the harnesses impeding the movement of the release mechanism.

Bill made the decision to abort the launch and remotely opened the vent to relieve the system dumping the load in a safe direction. Minor improvements will be made to the design to prevent similar issues and help avoid problems in deployment and stowing on the trailer. The Solar Cat design has advanced much and has had a few successful firings in Nevada. With Dale and Bill’s continued perserverence, the Solar Cat will one day fire from the MTA. It is a very long drive from Carson City, but Bill’s dedication to that test is a true honor to Richard Garcia and the passion he had for amateur and professional rocketry.

The RRS would like to thank our guests, our visitors and especially our membership for making this event possible.

The launch events will be discussed at the monthly meeting on Friday, September 13th, at 7:30pm at the front office of the Compton/Woodley Airport. RRS meetings are always on the 2nd Friday of each month. Contact the RRS secretary for details.

MTA Launch Event, 2024-06-29

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by Dave Nordling and Chase Lang, Reaction Research Society

The Reaction Research Society (RRS) held a small launch event at private testing site, the Mojave Test Area (MTA) on Saturday, June 29, 2024. Dave Nordling served as the pyrotechnic operator in charge for this event. RRS director of research, Rushd Julfiker, was also present to oversee the event. The weather was hot, reaching 100F, and the winds were holding still up until about 1pm. New associate member, Mia Marshall, came out to the MTA for the first time and we were glad to show her around the MTA and discuss the kinds of projects our members do.

On Saturday, June 29th, Chase and Jeff Lang conducted a series of tests to evaluate two experimental solid rocket propellants: Performance Fast 2 (PF2) and the Basic Batch. Each of the three “I”-sized 38mm motors fired correctly to the expected burn duration. The primary objective was to characterize the burn rate of PF2 using three test motors, each fitted with progressively smaller nozzles. Additionally, we aimed to test fly a rocket powered by Basic Batch propellant, which had been previously characterized.

For the PF2 testing, we prepared three motors, each with a different nozzle size to observe the effects on the burn rate. The tests were conducted on a custom test stand equipped with a load cell and pressure transducer for precise measurement of thrust and chamber pressure. The data from only the last two of the three firings were recorded and plotted below.

Following the PF2 tests, we launched a rocket powered by a reloaded 38mm Aerotech DMS motor loaded with Basic Batch propellant. This propellant had previously been characterized during a prior visit to the RRS, where we ended up with unburned grains due to a low Kn value. These grains were repurposed for the current test. The rocket achieved an altitude of over 6,000 feet and was successfully recovered with the aid of a custom-built Radio Direction Finding (RDF) beacon. The rocket was recovered downrange to the east thanks to higher winds that picked only just before launch after 1PM that day.

Also joining us that day was associate member, Bill Nelson. Stepping into our crew cabin, B/15, has been challenging given the large difference in height between the door and ground outside. Bill built the society a good step which makes getting in and out much easier.

The crew cabin was used for the temporary storage of hardware and tools as well as an inside work area during the cooler earlier months for the 1936 GALCIT liquid rocket engine replica built for American Artist and the Los Angeles County Museum of Art (LACMA). Given the success of the firing and filming event on June 8-9th, the project team brought all hardware and tools back to our shared workspace at the Compton/Woodley Airport where the pieces can be prepared for this fall’s exhibition at LACMA. The project team was grateful to Rushd and Mia for assisting with the moving of parts into trucks.

The next RRS monthly meeting will be July 12th at the front office of the Compton/Woodley Airport at 7:30pm. Meetings are always the 2nd Friday of each month and a good opportunity to discuss projects you’d like to do at the RRS MTA. Anyone interested in attending a meeting is welcome. Please contact the RRS secretary or any member of the executive council. Teleconference information can be provided for those attending remotely.

Chase Lang has asked the society to fund the building of a second 1515 launch rail at the RRS MTA. The executive council is assessing his proposal. The RRS is expanding our launch capabilities now that significant improvements to our basic infrastructure are completed. The council will likely discuss this at the next meeting.

Also RRS associate member, Zach Lesan, has made significant progress in building the mobile trailer for the society’s LNG horizontal cryogenic liquid cylinder. We hope to complete construction and testing successfully and have this asset ready for safe use this fall.

Next event at the RRS MTA will be with Aerospace Corporation as our client. Osvaldo Tarditti will be the pyrotechnic operator in charge. Also, several of our newer members have indicated interest in flying micrograin alphas at a forthcoming event. Jim Gross may oversee that event as the pyro-op in charge when the president schedules it. By society policy, all members and outside parties interested in using the RRS MTA or just visiting the site must first contact and be approved by the RRS president.

MTA Firing Event, 2024-03-02

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by Joel Cool-Panama, Secretary, RRS.ORG

The UCLA Prometheus team arrived to the MTA late Friday night under cold winds and light rain. Taking shelter from the elements, many set up their tents inside the Dosa Bldg.

The UCLA team brought their latest custom hybrid motor for a horizontal static fire. Dave Nordling served as pyrotechnic operator with Rushd Julfiker and Dimtiri Timohovich apprenticing. After passing low pressure leak check, they corrected issues in high pressure leak check.  Some minor control issues set back first hot fire to just past sunset. First igniter was a dud. Pyro-op in charge permitted a second attempt with a new igniter. Improper sequencing pushed out the second igniter before the booster charge could light the motor grain under the rush of the oxidizer stream which resulted in the dumping of the nitrous oxide flow over the grain with no ignition.   After some consideration to adjust the timing and reset a new electric match, given the late hour and a concern about hard starting the motor with a recently oxidizer soaked grain, the pyro-op in charge opted to call off the event.  Our unpaid volunteer pyro-ops sometimes will stay late, but sunset is generally considered the cutoff point. UCLA put a great deal of effort and ingenuity but with no success by the end of the event as sometimes happens despite best efforts. UCLA was very courteous throughout the whole event and the RRS looks forward to the Prometheus team’s return to the MTA.


Dimitri and his colleague, George Warner, began the trenching and electrical work this weekend needed to connect our new diesel generator at the MTA which will soon serve our larger electrical and lighting needs around our facility.  The work continued through Sunday, 3/3/2024. The crew cabin (Bldg 15) and the office (Bldg 14) were the first fully-owned RRS owned to be connected to electrical power as they have air conditioning. This will be a welcome resource in the late summer months.


Rushd Julfiker is working on his 38mm Contrails hybrid kit motor for an initial static fire.  Rushd refilled the society’s nitrous bottle. Dave Nordling and Dimitri Timohovich brought and shared their resources and experience. A hybrid motor firing hasn’t been done in a few years and its good to bring this work back as society. Unfortunately given the late hour and missing the nylon tubing needed, Rushd will return at a later date.

Osvaldo Tarditti worked on the shower systems in the restroom facility. We hope to have this convenience working in the coming months. The toilets, urinals and sinks continue to run well even during high usage periods.  The convenience of this facility at our remote location has been a much lauded benefit.

Dave Nordling added metal folding handles to the backsides of the wooden privacy panels in the windows of Bldg’s 14 and 15 for easier removal and replacement.  These heavy panels help insulate the interior from the beating sun. Also, the RRS ate its first meal inside Bldg 15.  The large interior space also can offer our visitors shelter from the elements once we add the beds and more chairs inside.


Dimitri brought the methanol run tanks and empty gas bottles used only for public exhibitions to the MTA. Dave Nordling brought the steel support frames to the MTA along with several components for the fluid feed systems for the 1936 GALCIT engine replica. The first engine parts will be brought to the MTA this coming Thursday when American Artist visits the site for the first time. We look forward to his visit and beginning the first steps in the project.



RRS members involved with the LACMA / American Artist project including RRS President, Frank Miuccio,will be at the MTA on Thursday, March 7, 2024. This will be the first time that American will see the site. Establishing the filming location for the static fire of the 1936 GALCIT replica rocket engine will be the first priority. American’s cinematographer (Chester) and a documentary film crew from PBS will also be present that day.

Next monthly meeting of the RRS will be March 8, 2024, at the Compton/Woodley Airport.