by Xavier Marshall, Vice President of EAA Chapter 96 and RRS member
The Experimental Aircraft Association, Chapter 96, at the Compton Airport in Los Angeles will be holding their monthly meeting on Saturday, April 20th starting at 10AM. The EAA hangar 96 is at 901 West Alondra Blvd., Compton, CA, 90220.
At the meeting, they will be hosting Terry Price, retired expert in composite structures. Composite structures have become common in aerospace vehicles. This in-depth presentation will show examples of how different composite types from fiberglass to stealth technology.are used.
Terry Price is a member of EAA Chapter 7. He is a composites material consultant and a nationally recognized expert. He recently retired as a Professor where he taught Composites Manufacturing Technology at the Cerritos College and Composites Training Center (CTC) for over 40 years. He has organized, developed and delivered technical training assistance to the U.S. Air Force, U.S. Coast Guard, U.S. Navy, NASA, Boeing, Honeywell, Lockheed Martin on the F-35 program, Northrop Grumman on the FA-18 and B-2 programs, (DoD) and McDonnell Douglas on the C-17 program.
Terry has also written
various Industry training manuals and publications some which include the FAA
Technical Manual: “Manufacturing Advanced Composite Components for Airframes” and
The Boy Scouts of America – Merit Badge for “Composites”.
This presentation will include a brief overview of composite materials, applications and processes, as well as hands-on examples for attendees. RRS members and other interested parties are welcome to join the EAA 96 at this event on Saturday, April 20th.
Before then, feel free to stop by the RRS meeting this Friday, April 12th, at 7:30pm, at the Ken Nakaoka Community Center in Gardena.
For any questions, contact: firstname.lastname@example.org
The Reaction Research Society (RRS) had another launch event at the Mojave Test Area (MTA). We had a nice cool day for the launch with a little wind. The winter seasonal rains left the land green which was a lovely change to the usual desert brown.
We were pleased to be joined by California State Fire Marshal, Ramiro Rodriguez, who came out to see our amateur rocketry group in action. David Crisalli was our pyro-op for the event and I was glad to apprentice under him once again for this event.
Also joining us was the students at University of Southern California’s Rocket Propulsion Laboratory (USC RPL). The students had prepared a 6-inch solid motor for static fire test. They were demonstrating an improved carbon-phenolic nozzle design. They arrived the night before and made preparations all morning.
USC still had a few more steps to go in their preparations before our other guests from Compton Elementary arrived. LAPD CSP and the RRS were glad to bring another class of young minds to see firsthand a rocket in flight. After all had arrived and settled, we held our safety briefing with our pyro-op, Dave Crisalli.
We had six of our standard alphas made by the kids at Compton Elementary. This launch event is the final day in the educational sessions we do with local schools thanks to our partnership with the LAPD CSP.
We loaded each of the rockets in the numerical order they were labelled. Each team had their own color scheme to help make them unique. Reds and blues stand out well against the desert browns and green of the brush.
After the last alpha from Compton Elementary, we launched Osvaldo’s alpha with a parachute recovery system packed in the payload tube. The parachute deployment system has a simple timer circuit that starts when a pin is pulled as the rocket speeds away off the rails. The red flagged plug in the photo is the safety pin to prevent accidental activation of the payload.
Unfortunately, the parachute system didn’t deploy after launch. It’s possible that the timer deployed the parachute too early which the forward pressure against the payload tube may have held the system in place. The other possibility is the timer didn’t start at all. Either way, the recovery of Osvaldo’s rocket had to be done like all the others… with a shovel.
After the last of the alphas fired, LAPD CSP packed up Compton Elementary for the long ride home. The RRS is grateful for the chance to show young people the excitement of rocketry in the Mojave desert.
The USC RPL team was ready after waiting through our fusillade of micrograin alphas. With final preparations made and instrumentation checking out, the installation of the igniter package on the end of a long sacrificial stick was inserted to the proper depth. Standing back and bringing everyone to safety, USC began their countdown.
USC had predicted a peak thrust of 800 lbf and a burn duration of 11 seconds. Actual burn time matched predictions, but thrust levels may have been short of expectations. USC was crunching the data as the RRS moved on to recovery of the alphas from down-range.
We were fortunate to find three of the alphas from the launch event. They were found north-west of the launch site which was unexpected. Another alpha from last year’s event was also found.
Osvaldo’s ratcheting extractor tool came in handy once again to avoid the back-breaking work of shoveling out an alpha once it’s found.
The next RRS meeting will be Friday, April 12th, at the Ken Nakaoka Community Center in Gardena. This will be our last meeting before the 2019 RRS symposium on Saturday, April 27th. We’ll have more information posted here on RRS.ORG very soon.