MTA launch event, 2018-04-07

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The RRS held a launch event with the students of Florence Joyner Elementary School at the MTA on April 7th, 2018. This event was the final step in the five-week RRS program that started in February thanks to the support of the Los Angeles Police Department’s (LAPD) Community Safety Partnership (CSP). The students got a tour of the RRS Mojave Test Area where both amateurs and professionals can test rockets in the open space of the Mojave Desert.

Students from Flo Jo Elementary at the RRS MTA

As always, we gave a safety briefing to the students to the hazards of the desert and our testing site. Dave Crisalli was our pyro-op for the event and gave an excellent background of the exciting work we do at the RRS.

Dave Crisalli addresses the students and officers as Frank Miuccio looks on

Safety briefing inside of the George Dosa building at the RRS MTA

The tour also included a live demonstration of burning the micrograin zinc/sulfur powders in the open air. The bright yellowish flame is a vivid demonstration of the combustion process.

Live demonstration of micrograin propellant at the MTA

We also demonstrated the burning of a more common solid propellant, an ammonium perchlorate, HTPB and aluminum powder composite grain. The same constituents used in the Space Shuttle’s solid rocket boosters (SRB’s). Thanks to Larry Hoffing for making the sample grain for the test.

Sample of a composite solid propellant grain just before the demonstration.

The Flo Jo elementary class built 10 RRS standard alphas for the event. Each painted uniquely by each of the teams.

Standard alpha rockets from Flo Jo Elementary

Once everyone had the safety briefing and completed the tour, we proceed to send everyone to our safety bunker as Dave Crisalli and I loaded each rocket into our rail launcher.

Dave Crisalli and Dave Nordling load an alpha into the launching rack

Each of the rockets flew straight and fast from the rails and did not disappoint the class seeing their hard work fly off the rails in a huge yellow cloud.

wide-angle still shot from Osvaldo’s high-speed camera, 2018-04-07

An RRS alpha rocket takes off, view from the bunker

After the clean launch of all of the rockets, the kids and the LAPD ventured out to the desert to try to find each of their rockets. Flag poles were made for the occasion to mark the locations so that they could be extracted later by shovel. 7 out of 10 rockets were found and two older rockets from previous events were also found and marked. It is tough to find each rocket in the desert scrub, but with the hard work of the students it’s good to recover at least some of the parts as they can be reused with some work.

After launch, the students and their mentors march to the desert to search for their rockets

The kids were very organized and had a great time. After taking a group photo at the gate, they returned to the city. The RRS was glad to host them and hope they can come back soon. Also, thanks to the LAPD CSP program for being supporters of this project to give this experience to the hard-working students of Watts.

Flo Jo Elementary and LAPD CSP pose before the RRS MTA sign

The RRS membership stayed behind to try a few experiments. The first test was trying to finish the foot plate welds on the horizontal thrust stand I have made for static testing alpha rockets motors of similar size with S-type load cell donated to the RRS by Interface Force Inc.

Interface Inc. – Precision Load Cells

The construction of the horizontal thrust stand is nearly complete, but unfortunately the desert winds made welding of the plates impossible. This steel frame will firmly hold alpha-sized rockets for static fire testing when bolted down to concrete slab in front of the old blockhouse. As a historical note, it was a young Dave Crisalli that helped pour this slab in the late 1960’s.

Osvaldo prepares to weld the foot plates of the horizontal thrust frame at the MTA

Scribe marks were made on the plates and the assembly was taken back to the city to be completed later. Many thanks to Jim Shirley of Shirley Design and Custom Fabrication in Huntington Beach for finishing the structural welds. The integration of the load cell and final mounting to the concrete slab will take place at the next launch event where the RRS hopes to measure the thrust and impulse bit of our standard alpha rockets.

The RRS horizontal thrust stand frame is complete and ready for mounting at the MTA

Richard Garcia built his own vertical test frame to support a small steel engine case he made for a rocket-candy grain.

Richard mounts his frame to the MTA structure for his experiment.

Rocket-candy is a simple mixture of potassium nitrate and sugar. Under moderate heat, the sugar caramelizes to form a viscous but firm mixture that suspends the oxidizer and can be packed in to the paper tube cases.

Richard “cooks” the sugar and potassium nitrate under low heat of the electric hot plate.

Richard’s work was documented by RRS member, Alastair Martin, who is working on a larger documentary of the RRS classes and our members’ experimental work at the society.

Alastair Martin films the tools and process of Richard Garcia’s rocket candy production

Once the motor grains had set, they were test fired to verify the quality of the mixture. The second motor grain was loaded in the steel rocket tube mounted to the vertical stand. Results were not spectacular as the end-burner grain design didn’t create much pressure. More testing will be done to improve performance, but the steel case and nozzle were undamaged.

Richard Garcia’s steel motor case and nozzle, just before loading the motor grain

Richard’s sugar rocket motor fires securely from the vertical mounted stand

One of the newest tools invented by our president, Osvaldo Tarditti, is a new ratcheting tool that pulls the rocket straight from the ground by a simple portable frame that can be angled to get the rocket to come out straight. The tool must be operated by two people to pull the rocket body straight from the ground. The tool was successfully demonstrated and nine rockets were pulled from the ground without any of the back-breaking work of shoveling. This is an excellent advancement for the society and will be very handy in the future.

Osvaldo’s newest invention, the Rockextractor

As this is the first launch event of this 75th anniversary year of the society those of us that were at the MTA at the end of the day took a group photo by the old I-beam which has been a part of the RRS since our earliest days of rocket testing. You can see the I-beam by itself in many of the old society photos. At the new MTA site, it is an integral part of our larger test structure that has seen hundreds of uses and still going strong.

Frank Miuccio, Alastair Martin, Dave Nordling, Richard Garcia and Osvaldo Tarditti pose by the iconic RRS I-beam

The RRS will be having their next monthly meeting on Friday, April 13th. The RRS 75th anniversary symposium is also happening on Saturday, April 21st. Please come out as it will be a great occasion with speakers and exhibitors from industry, universities and other amateur rocketry groups.

March 2018 meeting

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The RRS held its monthly meeting on Friday, March 9, 2018 at our usual location at the Ken Nakaoka Community Center. We got a timely start at 7:31pm. After the reading of the treasury report, we proceeded to discuss the agenda items.

The first item is the release of the Astrojet newsletter. We’ve sold the first twenty copies already. Copies are $10 each and proceeds go to benefit society activities in this 75th anniversary year. The RRS’s newsletter hasn’t been in print for nearly 20 years. The RRS is very proud to offer a tangible token for the public’s reading pleasure. The RRS is grateful to member Bill Janczewski for making a very professional looking newsletter to commemorate this milestone year for our society.

75th anniversary issue of the Astro-Jet is now on sale for $10/copy.

The second item on the agenda was to get an update on the on-going RRS educational event with the students at Florence Joyner Elementary supported by the growing and successful LAPD CSP program. The program that started in February is going well and the students were able to visit the California Science Center as part of the five session program. The rocket build was completed today and the painting will commence on Saturday. Frank had the students make the paper tube rockets for use with the air launcher. The launch event at the MTA was rescheduled to April 7th. The forum has also been updated with this change.

Flo Jo Elementary students visit the California Science Center with the RRS

Frank has compiled a lot of educational materials from the many Powerpoint presentations over the last few classes, but the amount of material is getting pretty large. Some work should be done to pare down the content to have a greater impact to our younger audience. Also, Frank has bound the information in a booklet which might make for a fine publication as we refine our content with the great questions we get from the students.

For the third agenda topic, we discussed the progress on the RRS symposium. All is going very well and our speaker list is nearly fully confirmed. We held our first teleconference and will hold the next one on Tuesday, March 13th to continue the many planning activities left. 116 free tickets on Eventbrite have been sold already. Frank has been putting out flyers to local high schools such as Redondo Beach, Torrance, and Gardena. We ask all members to download the flyer and spread the word to colleagues, friends and other fans of rocketry both past and present.

The RRS 75th anniversary symposium will be Saturday, April 21st, 2018 and will have speakers and exhibitors from academia, industry and government agencies on topics related to professional and amateur rocketry. If there are any questions, please contact Frank Miuccio our society vice president and symposium coordinator.

vicepresident@rrs.org

At the symposium, the RRS would like to show photos of people and projects throughout our long history. We have received a lot of great items from members past and present and we encourage everyone to contribute whatever they can to the on-going RRS history project. In particular, photos, articles or stories from the 1970’s and 1980’s are of particular interest to us as we have little from this time period.

I am happy to lead this project and hope to give a nice montage to display before all of our symposium attendees and also invite people to write articles describing their experiences and past projects with the RRS. It is through storytelling that the RRS history is kept for future generations to learn and appreciate those that have come before us. Please email the RRS secretary if you have anything to share for the RRS history project.
secretary@rrs.org

On the next agenda topic, we discussed the possibility of moving the meeting start time to 7:00PM. The purpose was to try to have more time to discuss the growing activities at the RRS. The RRS is growing and the meeting time is important. After some discussion, it was decided to keep the meeting time at 7:30PM. The meetings will start on time and discussions will have to stay on the topics of the agenda. Many people come from great distances, but if other topics want to be discussed they can be done before the meeting starts.

For the next topic, a lot of progress was made on the horizontal thrust stand that will be used at the MTA on the small concrete slab just in front of the old blockhouse at the MTA. I had the load cell adapter pieces made and they fit quite well. Many thanks to Matt Moffitt of CNC Specialty Machining in Huntington Beach.

adapter blocks made for the S-type load cell

The horizontal thrust stand will go out to the MTA on the April 7th launch event, but this will be only for final fit checks. Osvaldo is also helping with getting the last mating hardware pieces to complete the set.

load cell adapter matching a standard alpha payload tube

The main frame pieces were welded, but we will not be able to use the thrust stand at the next launch event until the foot plates are aligned and welded. Many thanks to Jim Shirley of Shirley Design and Custom Fabrication in Huntington Beach for his welding skills. I hope to complete the thrust stand and have it ready to static fire alpha rockets at the next launch event after April 7th.

main structure of the horizontal thrust stand to be used for alphas at the RRS MTA

Richard spoke briefly about the progress he’s made to date on his liquid rocket vehicle build. The RRS standard liquid rocket will be the result of a few builds and a lot of testing to arrive at what will be a practical and effective standard design. Richard has built his thrust chamber with a G10 fiberglass internal liner insert and a graphite nozzle. Richard found a good supplier of fiberglass tubes and pipes that are sold in convenient 5-foot lengths.

Richard’s liquid rocket thrust chamber with fiberglass interior wall liner

Richard’s design also includes a pintle-type of injector which is in the works. We hope to see more details when he finishes this piece in the coming month or so.

The last agenda topic was about that fact that we are flying a lot of alphas, but few of them have payloads besides the smoke grenade which works well to help spotting them in flight at apogee. I have looked into making flight speed sensor and my parachute system. I am hoping this will be a semi-regular topic in future meetings.

A future topic for next month’s meeting will be to discuss the pyrotechnic operator’s exam. Licensing is done by the California Fire Marshall’s office and it is an important qualification to have. The RRS is working to get more members trained to help us expand our rocketry activities at the MTA and help us expand knowledge about safety in our hobby.

The meeting adjourned at 9:03pm. The next RRS meeting on April 13th will likely be spent working on the final details of the RRS symposium which will take place 8 days later at the same Ken Nakaoka Community Center in Gardena, Saturday, April 21, 2018.

If there is anything from the meeting that I missed or misstated, please let me know. I am also trying to keep the email list updated. Please let me know if anyone isn’t getting the meeting notices.

secretary@rrs.org

USC testing at the RRS MTA – Traveler III

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The University of Southern California (USC) Rocket Propulsion Laboratory (RPL) team led by Haley Karow had a static firing of their prototype solid rocket booster at the RRS MTA on February 17, 2018. The RRS was glad to support USC on yet another advancement in their solid rocket motor program for students.

USC prepares their booster motor for get clomid testing at the RRS MTA, 2-17-2018

USC’s successful test demonstrated a 6-element bates grain solid motor with two improved features:
(1) a newly designed carbon phenolic nozzle with graphite inserts for the converging section and throat and (2) a linen phenolic and EPDM thermal protection system for the case. The motor grains were cast in Victorville at a site owned by Exquadrum.

USC Traveler III motor firing at the MTA, screen shot from Osvaldo’s camera

This full-sized motor design will power the Traveler III space-shot vehicle. The nozzle looked great after the firing, but a second nozzle will be used for the flight. The motor liner also did well. With a peak thrust of 4,864 lbf as measured by the USC horizontal thrust stand load cell, the total impulse was 41859.0 lbf-sec. Post-test inspections showed good results and the project can move forward with their flight vehicle. Ultimately, the Traveler III will attempt to reach an altitude of 400,000 feet (121.9 km) most likely from Black Rock, Nevada.

USC’s horiztonal thrust stand

The Reaction Research Society (RRS.ORG) is a 501(c)3 educational non-profit group that supports universities, high schools and other responsible private groups with both educational programs and resources for xanax online rocket testing. Now in our 75th year as a society, we hope to expand our reach to others as we grow into a new quarter century.

Contact USC RPL or the RRS for more details.
USC RPL contact information