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  1. #18061
    Join Date
    18th October 2016
    Posts
    460
    Printed, tested & tweaked my Eggfinder Rx LCD + GPS case. The screws that hold in the GPS are a little tricky to install, but a long skinny screwdriver works (plus I added some tiny holes on the opposite wall if you want to drill them out for a straight screwdriver run). I have the back cover printed & fit checked. I'll print a new white handle tomorrow and it'll be done.

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    TRA L2. I-class record: "Vanish 29" with an I224, 14,596ft, Mach 1.92. Video here.

  2. #18062
    Join Date
    31st October 2016
    Posts
    86
    What I did rocket wise today -- Watched (listened, mostly) a video on Tested.com in which Simone Gietz (Queen of Sh!##& Robots) built and launched something from Madcow -- while I updated notes for my orbital mechanics/escape speed lecture.

    Last edited by jlabrasca; 6th December 2017 at 07:32 PM. Reason: grammar!
    NAR Level 1, Sheridan Oregon, 09/16/17 -- scratch built 7.6cm x 120cm rocket on an AT H182R.

  3. #18063
    Join Date
    23rd March 2011
    Location
    Goodyear, AZ
    Posts
    2,866
    Finished another Majestic, built specifically for the sustainer on a two stage F15-0/ F15-6. I managed to shave an ounce off the 9.6 oz. estimated weight on the box.
    Got a bunch of 29mm CTI casings from ndrockets, now I know that CTI makes a tailcone closure for 29mm!
    NAR 92675 L-3 TRA 14800 KG7IUN
    I may be getting older, but I refuse to grow up.

  4. #18064
    Join Date
    30th January 2016
    Location
    US > OK > NE
    Posts
    3,326
    Quote Originally Posted by Wayco View Post
    Finished another Majestic, built specifically for the sustainer on a two stage F15-0/ F15-6. I managed to shave an ounce off the 9.6 oz. estimated weight on the box.
    Got a bunch of 29mm CTI casings from ndrockets, now I know that CTI makes a tailcone closure for 29mm!
    You need an h399 for the 6g that goes with that tailcone :-). GD29 machbreaker....

  5. #18065
    Join Date
    23rd March 2011
    Location
    Goodyear, AZ
    Posts
    2,866
    Quote Originally Posted by dhbarr View Post
    You need an h399 for the 6g that goes with that tailcone :-). GD29 machbreaker....
    And an 18 second motor delay for my 11 oz. rocket. Oh, and a psychiatric evaluation for even thinking about flying it.
    NAR 92675 L-3 TRA 14800 KG7IUN
    I may be getting older, but I refuse to grow up.

  6. #18066
    Join Date
    30th January 2016
    Location
    US > OK > NE
    Posts
    3,326
    Quote Originally Posted by Wayco View Post
    And an 18 second motor delay for my 11 oz. rocket. Oh, and a psychiatric evaluation for even thinking about flying it.
    Well, mine's a tubefin; wanna' race?

  7. #18067
    Join Date
    19th January 2009
    Location
    Alexandria VA
    Posts
    1,281
    Starting building again after a year and a half layoff...partly due to being away from home for a year followed by a move across the country (into a house half the size...Wash DC is expensive and small), but also because the rocketry mojo wasn't flowing for a long time. Life was busy and there seemed to be no time for rockets.

    All that's behind me now, new house is all setup, and the rocketry work bench finally in place. So, I *finally* started work on a Wildman Jart 4" that I bought years ago...the rocketry mojo is back! Going to keep the 54mm MMT, but stretch the main body tube about 10" to allow for a 54/2560 motor option. First build I've done in almost two years.

    So good to be back. Now I just need to launch a darned rocket for a change!
    Mark Rose, KG7NWI
    TRA #11717 L3

  8. #18068
    Join Date
    23rd March 2011
    Location
    Goodyear, AZ
    Posts
    2,866
    Quote Originally Posted by Viperfixr View Post
    Starting building again after a year and a half layoff...partly due to being away from home for a year followed by a move across the country (into a house half the size...Wash DC is expensive and small), but also because the rocketry mojo wasn't flowing for a long time. Life was busy and there seemed to be no time for rockets.

    All that's behind me now, new house is all setup, and the rocketry work bench finally in place. So, I *finally* started work on a Wildman Jart 4" that I bought years ago...the rocketry mojo is back! Going to keep the 54mm MMT, but stretch the main body tube about 10" to allow for a 54/2560 motor option. First build I've done in almost two years.

    So good to be back. Now I just need to launch a darned rocket for a change!
    Welcome back Mark! The "Jimbo Jart" is a great place to jump back in, but be careful with the additional weight. I added an avbay and payload tube to "Jughead", my 5" Jart and had to add tip to tip fiberglass to the fins after several broken parts on them.

    Where are you stationed now?
    NAR 92675 L-3 TRA 14800 KG7IUN
    I may be getting older, but I refuse to grow up.

  9. #18069
    Join Date
    22nd September 2017
    Posts
    338
    Took a senior level engineering final exam on supersonic wind tunnels. Oblique shocks and rocket nozzles. A true a**kicker to the brain. We all left guessing if we'll pass this Dr.Margraves. Legend is his dad assisted in design of the SR-71 turboramjets as a mechanical. Margraves is tough on engineering students as has expectations of design your own damn supersonic wind tunnel to blah specs by yourself. Because You're a Senior Engineering Student.. Teach yourself for random exams. Nice guy to talk with. Very hard classes. Home works due on exam days doesn't help the learn part. Advanced Fluid mechanics with compressible gas flow. /Rant.

  10. #18070
    Join Date
    22nd September 2017
    Posts
    338
    Gotta love how he thinks a Mach 2.4 CO2 fed wind tunnel project is trivial. Design for 50,000 ft and altitude pressure. It "only" had a variable throat area and diffuser area. And a compressor. And yah had to use ten formulas to make the tables in the back of book to actually start the problem. The book only covered air. Then yah had to find an oblique shock, a normal shock moving through the diffuser after a test section, the start up diameter, the steady state diffuser area, and the operational costs and other mach numbers. Book had three sentences on variable throat wind tunnels. And if areas weren't right it would un-start. Then the book called "diffuser sizing is an art form", because apparently it's still trial and error since 1880. LOL... Guys... Doing an HPR multistage from scratch twice was easier this semester than that Wind tunnel stuff... Prof started calling us cheaters after entire class failed midterm real bad. Naw man we were just f***ing stupid. Dude can do a FEA sim of a Hellfire missile motor and write up graduate documents, walks you through how to design a gimbal for a test stand similar to the NASA unit he used, but teach... Not his forte'. Verbally teaches it. Concepts.

  11. #18071
    Join Date
    31st October 2016
    Posts
    86
    Quote Originally Posted by Andrew_ASC View Post
    .... but teach... Not his forte'. Verbally teaches it. Concepts.
    Reminds me of my first karate teacher. Nice guy to talk to but he had me wax his car, sand his deck, paint his fence. I worked really hard, but his assignments didn't help me learn anything. I saw him do karate, but he sure couldn't teach it.

    Meanwhile, rocket-wise, I ordered a couple pieces of 38mm motor mount-tube and and laid out patterns for ribs and struts to frame a Haack nose-cone to fit LOC 3 inch motor tube. I also stopped pretending that I am not working on an L2 rocket.
    NAR Level 1, Sheridan Oregon, 09/16/17 -- scratch built 7.6cm x 120cm rocket on an AT H182R.

  12. #18072
    Join Date
    21st January 2009
    Location
    Penns Creek, PA
    Posts
    7,003
    Score!

    Sent from my SAMSUNG-SM-J326AZ using Rocketry Forum mobile app
    ************************************************** ***************************
    SECRET SANTA SENT AND RECEIVED LIST.
    http://www.rocketryforum.com/showthr...04#post1745804


    Celebrating 10 years as Papa Elf!

    http://www.rocketryforum.com/showthr...rs-as-Papa-Elf

    Total Impulse for 2017: 110 - Would love to fly a L1000
    Total money for MOAR IMPULSE: $0

  13. #18073
    Join Date
    21st January 2009
    Location
    Penns Creek, PA
    Posts
    7,003
    Quote Originally Posted by n3tjm View Post
    Score!

    Sent from my SAMSUNG-SM-J326AZ using Rocketry Forum mobile app
    It wont let me upload my pic

    Sent from my SAMSUNG-SM-J326AZ using Rocketry Forum mobile app
    ************************************************** ***************************
    SECRET SANTA SENT AND RECEIVED LIST.
    http://www.rocketryforum.com/showthr...04#post1745804


    Celebrating 10 years as Papa Elf!

    http://www.rocketryforum.com/showthr...rs-as-Papa-Elf

    Total Impulse for 2017: 110 - Would love to fly a L1000
    Total money for MOAR IMPULSE: $0

  14. #18074
    Join Date
    18th October 2016
    Posts
    460
    My case is done for the Eggfinder Rx LCD + GPS module.

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    I ran some tests walking around the neighborhood between it and my twins' Eggfinder Mini av bays. Everything is working great.

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    I also stopped by the local hobby shop and picked up some 2-56 machine screws to attach the Featherweight screw switches to my twins' Formula 38 avionics bays. DONE!

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    TRA L2. I-class record: "Vanish 29" with an I224, 14,596ft, Mach 1.92. Video here.

  15. #18075
    Join Date
    11th April 2017
    Location
    Brisbane Australia
    Posts
    597
    Quote Originally Posted by jlabrasca View Post
    I also stopped pretending that I am not working on an L2 rocket.
    The Serene Rocketeer Prayer:

    Rocket Gods grant me the serenity
    to accept the Rockets I should not build;
    courage to build the Rockets I can;
    and wisdom to know the difference...
    Reasonably new to rocketry and hailing from the land down under.. I speak metric... I know not of these feet and inches you speak of...

    QRS: #193
    AMRS: #148

  16. #18076
    Join Date
    20th January 2009
    Location
    Johnson City, NY
    Posts
    1,984
    I've spent the last week fighting paint issues.

    Plastic nose cone - primed it OK. Wet sanded it. Must not have waited long enough to completely dry. Painted top coat and got fisheye
    Waited a few days and sanded the bad spot off. Re-primed. Primer crazed. (and it was more than the required 48 hours later from the top coat)
    Sanded bad spots. Re-primed - more crazing
    Did even more sanding. Re-primed. Only one small spot had some crazing - left it as it will be skinned
    Went to do new top coat. Static charge appeared to attract every dog hair and piece of lint for 5 miles (well, not quite that bad but still).
    So I need to wait for it to dry and lightly sand to remove the junk

    Rocket Addict
    More...more...I'm still not satisfied (T. Lehrer)

  17. #18077
    Join Date
    22nd September 2017
    Posts
    338
    Kicked that SAAB 372 thread's ass with Open Rocket.. Because no one else would.

  18. #18078
    Join Date
    31st October 2016
    Posts
    86
    Quote Originally Posted by snrkl View Post
    The Serene Rocketeer Prayer:

    Rocket Gods grant me the serenity
    to accept the Rockets I should not build;
    courage to build the Rockets I can;
    and wisdom to know the difference...
    Insofar as I may be heard by anything, which may or may not care what I say...

    --
    RZ


    I've got a mess of grading to do, and two exams to write, but I am going to get into the shop this weekend and work a bit on this

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    I've got the fins milled and assembled, all of the centering rings cut, and the airframe tubes cut. I need to cut fin slots, cut the upper parachute bay tube (is there a name for blind stuffer tube installed in the upper half of a separable airframe?), cut the motor tube, and start assembling... should be easy, right?
    NAR Level 1, Sheridan Oregon, 09/16/17 -- scratch built 7.6cm x 120cm rocket on an AT H182R.

  19. #18079
    Join Date
    14th July 2015
    Location
    Randolph, NJ
    Posts
    3,126
    My first bit of skinning with Accur8 vinyl. Yes, the cuffs are on the outside, whoops.
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    Recently completed: Starship Avalon / in progress: Accur8 Trajector and Ragnarok Orbital Interceptor / planning: Alcubierre and Plasma Dart 2
    My design thread / Fleet pics /
    My OR Renderings

  20. #18080
    Join Date
    23rd March 2011
    Location
    Goodyear, AZ
    Posts
    2,866
    Added a Pico to Jughead's sled, and built another Eggfinder for Sharon's Stinger. The latest version of the Eggfinder has a new method of mounting the GPS module. My little 15w Weller pencil didn't have the juice to fill in the slot so I had to find another soldering iron that could.
    NAR 92675 L-3 TRA 14800 KG7IUN
    I may be getting older, but I refuse to grow up.

  21. #18081
    Join Date
    18th November 2014
    Location
    Somewhere in Ohio
    Posts
    793
    I battled the freezing cold temperatures, and the snow, and walked to my local park to fly my flying saucer on a C6-5.


    Thanks,
    Andrew - 14 year old rocketeer who loves to watch and fly model rockets all year long!!!
    2017 - 255.2 Ns _ Biggest motor, AT G125T, highest flight around 3,500'
    TRA Member #17056
    Owner, Andrew's Rocketry Shop - andrewsrocketryshop.blogspot.com

  22. #18082
    Join Date
    18th October 2016
    Posts
    460
    I finally carved out enough time during daylight hours to spray the color on my Mouse 38. Here are a few shots of peeling off the mask.

    It's definitely not perfect, but looks great from about 5 feet away - good enough! I did learn not to leave on the EnduraMatte vinyl mask as long as I did (a week maybe?). It was pretty stuck on there and the edges aren't as clean as they should be. All the previous times I've used it as a mask, I stuck it on and painted on the same day. It works great if you do that.

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    TRA L2. I-class record: "Vanish 29" with an I224, 14,596ft, Mach 1.92. Video here.

  23. #18083
    Join Date
    10th July 2007
    Location
    Melbourne, Australia
    Posts
    1,211
    Figured how a 2mm piece of CF plate can be my motor mount in my Go Devil 38. Then cut it on the mill.
    TRA 13430, Level 3

    "Everybody's simulation model is guilty until proven innocent" (Thomas H. Lawrence 1994)

  24. #18084
    Join Date
    19th January 2009
    Location
    Alexandria VA
    Posts
    1,281
    Wayco, I am assigned to the Pentagon...not where I wanted to go, but where the AF decided I needed to be. My F-35 field experience coming back to haunt me, as I am working the program for the AF (not JPO). After the luster of working in the five sided building wears off, its damn staff work. I live professionally in front of a computer or in meetings...ugh. Id rather be on a flight line job. But, after being away from home (again) for a year, coming home every day is *nice*.

    And, good point on the weight. The upper airframe piece I have is actually CF airframe. Will not negate the coupler weight, but will help some. Ill keep it from becoming a heifer Jart.

    Stuck a fin for the first time in almost two years today! Damn its good to build a rocket again. Cannot wait to fly this beast (Wildman Jart 4). Space heater is trying hard to cure ES6209 after a VA snow day.Click image for larger version. 

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    Sent from my iPad using Rocketry Forum
    Mark Rose, KG7NWI
    TRA #11717 L3

  25. #18085
    Join Date
    18th October 2016
    Posts
    460
    My Mouse 38's paint is dry & everything fit checks fine. I need to add nose ballast and attach the recovery harness to the nose cone...then fly!

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    TRA L2. I-class record: "Vanish 29" with an I224, 14,596ft, Mach 1.92. Video here.

  26. #18086
    Join Date
    20th February 2009
    Location
    Cayuga, Indiana
    Posts
    12,824
    Quote Originally Posted by GrouchoDuke View Post
    My Mouse 38's paint is dry & everything fit checks fine. I need to add nose ballast and attach the recovery harness to the nose cone...then fly!

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    Nice flames (or waves?)!

    From the Ether...
    L3, TRA #11847
    Tripoli Indiana #132
    Tripoli Central Illinois #59
    Central Illinois Aerospace (NAR) #527
    Chicago Rocket Mafia, "Big Bucks" Dixon
    ___________________________________

    Quiet little voices creep into my head. -- We Were Promised Jetpacks

  27. #18087
    Join Date
    14th July 2015
    Location
    Randolph, NJ
    Posts
    3,126
    Quote Originally Posted by GrouchoDuke View Post
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    That is really one of the nicest paint schemes I've seen around here in a while. Great work.
    Recently completed: Starship Avalon / in progress: Accur8 Trajector and Ragnarok Orbital Interceptor / planning: Alcubierre and Plasma Dart 2
    My design thread / Fleet pics /
    My OR Renderings

  28. #18088
    Join Date
    18th October 2016
    Posts
    460
    Quote Originally Posted by dixontj93060 View Post
    Nice flames (or waves?)!
    Quote Originally Posted by neil_w View Post
    That is really one of the nicest paint schemes I've seen around here in a while. Great work.
    Thanks! Dixon, I guess it's a tribal-flame tattoo inspired wavy thing. It's also kind of a spin off from the paint job I did on my Quicksilver.
    Click image for larger version. 

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    TRA L2. I-class record: "Vanish 29" with an I224, 14,596ft, Mach 1.92. Video here.

  29. #18089
    Join Date
    22nd February 2013
    Location
    Garland, TX
    Posts
    3,644
    Got to playing around with the parts bin, and a salvaged washing machine agitator...yeah, that'll fly.

    So much of my rocket building time has been diverted toward my "other hobby": Race Timing

  30. #18090
    Join Date
    30th January 2016
    Location
    US > OK > NE
    Posts
    3,326
    I'm going to keep an eye out, that's a great dragwagon. Imagine a smoker back there....


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