The September 2013 meeting was attended by about 6 members. The date for the next launched has been moved back to November.

I brought two LR101 rocket engines to show. One brand new, and one that had been flown and salvaged. A friend of mine from college who sometimes comes to me with his crazy ideas wants me to put an LR101 rocket engine on a BD-5 aircraft witch would make it the world’s smallest rocket plane. I’m aware of how crazy and nearly impossible accomplishing a flight with that setup would actually be. I have realist expectations and only really expect to do a static test with a non-flight version of the engine and a stretch goal of static firing the same version while mounted in the aircraft with it tied town. His end goal is to use this stunt to impress investors enough to give him money to peruse building a space plane with a similar configuration to ambien online Virgin Galactic’s vehicles capable of sub orbital flights from LA to London. I don’t have any expectation of success there, but it can’t hurt to let him try. It should be fun to try firing that LR101, especially since he’ll be footing the bill.

Osvaldo also brought 2 LR101’s. He borrowed them from Norton Sales in North Hollywood. That is also where my friend got his engines and it’s really an amazing place. They have all sorts of aerospace surplus stuff from the cold war and the space race. It really warrants a visit if you’re in the LA area. One engine Osvaldo brought was complete with the thrust frame and all the gimbaling hardware. The second was just a thrust chamber. He also had a mandrel of some kind used for forming the thrust chambers.

I brought a sand casting of the Beta rocket coupler I made from a 3D print. I used a very course sand and the surface was far too ruff to use, but the process shows potential, I just need to figure out the right details to get better results. Also from 3D printing was a servo valve I brought that I’ve been working on. The valve is pretty much complete save for one or two small changes. I was originally planning to use them as the main propellant valves, but they actuate too slowly, however they can still be used on valves that don’t need to be actuated fast. Now I’m thinking about designing some pneumatic valves based on Tom Mueller’s Pyrovalves which he wrote a clomid great article for in the RRS Newsletter in February 1995 .

Frank brought a list of all the newsletters that the RRS has published so now I know how many we have left to digitize.

I haven’t had time to work more on the web site. since the last meeting report I sent out. There is not to much more that needs to be done, but I’ll need to work with Frank and Osvaldo to finish membership access.

The attached pictures are the two LR101s, the dual pneumatic valve for the LR101, my servo valve, and two BD-5s.

-Richard Garcia
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The August 9^th meeting had 6 members present. Unfortunately Frank and Osvaldo couldn’t make it but Matt our treasurer filled in for them. The only official business discussed was a treasury report and the moving of the October launch date to accommodate Polaris, but a new date has not been set.
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I got to let everyone know that 3D printed rocket competition has finished and the winners have been announced, and our team did not win. The team that won was the Canadian team who’s flight configuration was an air launch from a Gulfstream.

I also had the opportunity to share what I’ve been doing with my 3D printer since I’ve gotten it. I brought in a few sample parts including some stuff I’ve made for working on a Beta Rocket. I made a sample of the coupler which fitted nicely into the pipe sizes without any trouble. I also made a larger version (to account for shrinkage) so I could try investment casting it in aluminum. I also brought in my first attempt at 3D printing a nose cone mandrel for the Beta. The idea is to 3D print an undersized nosecone in plastic and then to wrap the 3D print in Fiberglass for a finished product. My printer uses PLA and I will be leaving the plastic in the final product. Alternately the form can be printed out of a different plastic, high impact Polystyrene. If this plastic is used it can be dissolved out using limonene. I hope to bring some actual castings to the next meeting. I’ve also made a prototype servo valve using printed parts and I’ll bring that to the next meeting as well.
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In other news I’m nearing the completion of the new web site. I’ve managed to solve the last two bothersome issues that were slowing me down. So I hope to have it up and running sometime soon.

And don’t forget to renew your membership.

-Richard Garcia

The July 12^th meeting was quite an active one with about 13 in attendance and some interesting things to be shared. To accommodate Polaris this October the Launch may either be moved up to September or postponed to November. We’ve not officially set the date.

Larry Hoffing and his son did a great demonstration of polyurethane casting a nosecone. They had a mold of the nosecone and they poured in the polyurethanemix which was onepart resin and one part hardener by volume. They poured in some of the mix and rotated the mold as it hardened to make a layer of urethane around the walls of the mold. They did a few layers like this. The mold can be left like this to be hollow or as they did it can be filled the rest of the way to make a solid nosecone. The finished product can be sanded and it can be drilled out to make it hollow as well. The process is less precise than machining but significantly reduces tooling costs.It was discussed that the mold was originally from George Dosa for the Alpha rocket, and that Frank has some of the original forms from George Dosa for making the molds for casting nosecones.
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At the last meeting a few copies of the RRS beta plans went out. (I’ll eventually have a PDF of the plans on the new web site) With an impressive turnaround time Keven Tice came back this month with a finished rocket. He did an excellent job with the rocket and it looked great. He made some modifications to the design. He increased the diameter of the payload section, and he made a fin can instead of using straps. He also changed the fin shape from a parallelogram to a symmetric trapezoid.It total he spent around 40hrs building his beta. Since he changed the OD of the payload section he will have to make an adapter for the launcher. We look forward to seeing it fly at the next firing.

The 3D printed rocket competition has finished and I had to opportunity to share the end results and talk a little about the engine that we submitted. The winners will be announced around the end of July. If you want to know more you can see everything from us and the other competing teams at the contests site. http://www.openspaceuniversity.org/#!designs2/cun6

 
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Frank brought an RRS patch from the late 80’s and an RRS hat. He also brought and gave out some extra copies of an old RRS newsletter. (Volume 58, number 1, march 2001)  He also mentioned to me that from his stint as the secretary of the PRS (there equivalent of the RRS president) he has a copy of all the PRS newsletters that he wants to bring to the next meeting of the RRS so I can scan them for the RRS library.

I think the best treat of the meeting was something Frank brought to share. Frank showed a very interesting sort film featuring the RRS. Around the late 50’s early 60’s a college student from UCLA for a school film project create a short film originally recorded on 16mm film called “Whity” I won’t describe the whole thing here but it takes place at the MTA and Whity is a young boys pet mouse who’s is set to be launched in the nose cone of a large rocket when the boy has second thoughts about his pet’s safety.The film was well directed and well shot with believable and relatable characters and compelling story telling with a clear climax and resolution. The film felt like a little slice of history especially with every one dressed normally for the time. One of the characters also reminded me just a bit of Biff from “Back to the Future”

We were informed by John who was active in the society around that time about the concept for the rocket used in the film. It originated from the fact that typicalzinc-sulfur rockets seen at the RRS would have very high accelerations and would fly so fast that they would be very difficult to photograph and impossible to follow the rocket through its flight on film. To make a rocket more conducive to filming they made a very heavy rocket to slow its flight down so it could be filmed more easily. The rocket made use of a galvanized flue pipe for an outer skin and generous amount of wood on the inside.The crash as filmed was real and the parachute deployment was a special effects.

Frank has this film on DVD and I hope we can get it up on the new version on the web site. Since we don’t have contact with the original creator we may have to post it for members only. However most artists love to have their work seen, and I’m confident that if we got ahold of him they would be fine with making it publicly available.
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I also wanted to share these pictures I found of Microcosm’s Scorpius S-RM launch vehicle with 20,000lb of thrust being static tested at the MTA.

-Richard Garcia