Quantcast
Shockwave 29: Finished!
Onebadhawk Giveaway!


Page 1 of 2 1 2 LastLast
Results 1 to 30 of 43
  1. #1
    Join Date
    1st April 2011
    Location
    Utah / UROC
    Posts
    3,123

    Shockwave 29: Finished!

    After a long Sunday of talking with my brother, Ive decided to take up a new project. The Mach-Mobile 2, replacing my Mach-Mobile 1 (pronounced automobile, minus the auto, plus the mach). The MachMobile2 will be 29mm minimum diameter rocket, built like a tank. The tubes will be 2 wraps of fiberglass and 3 wraps of 2x2 twill carbon fiber. The fins will be of my own creation, I will be pressing my own fiberglass sheet and laminating it with more 2x2 CF. I dont have plans for a nose cone, possibility a ShockWave 1.14in Fiberglass one.

    This project is largely inspired by Jim Jarvis's Articles on Rocketry Planet and Tfish's videos. I will be following most of the steps the RP articles, including the epoxy coating and T2T carbon. Right now, I'm in the designing stage, drawing up Openrocket files, designing for maximum sexy-ness. Tonight, I might make the trip to ACE to see if I can find a good dowel for the mandrel.

    Tonight or tomorrow, I'll order the CF, FG, and Peel-Ply from Aircraft Spruce.

    Also, THIS IS A VIDEO BUILD!!!! You will see me do everything instead of me just telling you everything. I want to format it similar to Tfish38's videos. I will narrate the build as I go but I'll speed up the boring parts to make this more enjoyable. You might be able to help me more that way.

    Most likely, this will be a long build, so go pop some popcorn.

    So, without any further delay, Let the building begin!

    Alex
    Subscribe to my Youtube Channel!
    NAR Jr. L1
    TRA Jr. Flier

  2. #2
    Join Date
    1st April 2011
    Location
    Utah / UROC
    Posts
    3,123
    Designed some rockets on OpenRocket just a minute ago.
    Rough Draft. I'll specify the weight of the CF and stuff later.

    MachMobile2 Dual Deploy.ork

    MachMobile2 Single Deploy.ork


    Alex
    Subscribe to my Youtube Channel!
    NAR Jr. L1
    TRA Jr. Flier

  3. #3
    Join Date
    1st April 2011
    Location
    Utah / UROC
    Posts
    3,123
    A few more things.

    I drew up the plans for where to cut the CF in study hall. After finding out how much CF I needed, I found the area af the CF and the fiberglass. Figuring the CF was $31 a yard and the FG was $10 a yard, I included epoxy and peel ply and got a price of $21 for the fins and airframe. Whoa. That didn't seem right. I checked my numbers again. Everything was included, CF, peel ply, fg, epoxy. Still, $21-25. There ya go guys! Everything but the NC and recovery for $25!

    Another thing is, my family is moving. I will have little time to build In the next two months. I'll do my best, still this'll be a long build.

    I ordered the Cf, peel ply and fg from aircraft spruce last night.


    Alex
    Subscribe to my Youtube Channel!
    NAR Jr. L1
    TRA Jr. Flier

  4. #4
    Join Date
    20th January 2011
    Location
    Cache Valley, UT
    Posts
    916
    Moving far?

  5. #5
    Join Date
    1st April 2011
    Location
    Utah / UROC
    Posts
    3,123
    Not moving far, a few blocks away from my old house!

    While on an orchestra trip to California, I drew up newer, sexier openrocket plans (at least in my opinion)

    mach rocket 1.1.ork

    Tell me what you think!

    I will also be building a tower to eliminate the need of lugs or rail buttons.

    My order of CF and FG came in while I was away. Looks good.

    First flight might be on an H410Vmax at hellfire 17 in August Sims to about 5K at about mach 1.5. Zero to 1137mph in .4 seconds! (according to openrocket)

    New name: the "SHOCKWAVE"

    Alex
    Last edited by Aksrockets; 19th March 2012 at 01:35 AM.
    Subscribe to my Youtube Channel!
    NAR Jr. L1
    TRA Jr. Flier

  6. #6
    Join Date
    13th February 2012
    Location
    Central Jersey
    Posts
    5,074
    I'm building something like this, only the el-cheapo version: a footlong 29mm phenolic tube with 3 rectangular airfoil fins and a nosecone. I designed and built a minimum-diameter ogive tailcone retainer so I can use motor eject, though I might end up not doing that for the planned H410 flight because it would early eject at 200 ft/s at around 9000 feet.

    Some questions:
    How do you plan on implementing a tailcone like that? The CTI 29mm tailcone closure doesn't taper nearly that much.
    What are you using for deployment? (I plan to get a Telemini for tracking and deployment on mine, but CF will impede tracking for you)
    Why is the streamer so small? OpenRocket predicts a 150-200 ft/s landing speed depending on the motor you put in (quite a crater that'll make!).

    Also, if you can find a lighter nosecone strong enough for supersonic flight than the Shockwave, you would get significantly more speed. The Shockwave is kinda heavy.
    Two rocket motors burned this year.

  7. #7
    Join Date
    1st April 2011
    Location
    Utah / UROC
    Posts
    3,123
    Quote Originally Posted by CarVac View Post
    Some questions:
    How do you plan on implementing a tailcone like that? The CTI 29mm tailcone closure doesn't taper nearly that much.
    What are you using for deployment? (I plan to get a Telemini for tracking and deployment on mine, but CF will impede tracking for you)
    Why is the streamer so small? OpenRocket predicts a 150-200 ft/s landing speed depending on the motor you put in (quite a crater that'll make!).

    Also, if you can find a lighter nosecone strong enough for supersonic flight than the Shockwave, you would get significantly more speed. The Shockwave is kinda heavy.
    Sorry, I don't have the tapered retainer yet so I don't know the specs.
    For deployment I'm using motor eject, tracking smoke and a pair of sharp eyes.
    I will have several streamers on site, I'll just choose one depending on wind conditions

    what would you suggest for the nc?

    Alex
    Subscribe to my Youtube Channel!
    NAR Jr. L1
    TRA Jr. Flier

  8. #8
    Join Date
    6th February 2010
    Location
    Camarillo, CA
    Posts
    2,185
    So far I haven't seen any videos. Something wrong?

    Bryce Chanes
    ROC Board Member
    NAR 89467, TRA 13928 L3
    KJ6TEC
    Follow me on: YouTube, Twitter, Google+, Facebook

    2011: 14,773Ns (44% N)
    2012: 38,670Ns (89% O)
    2013: 26,936Ns (32%O)
    2014: 7,392Ns (45%M)

    www.Project60k.com

  9. #9
    Join Date
    18th January 2009
    Location
    Savannnah, Ga
    Posts
    4,046
    Quote Originally Posted by Aksrockets View Post
    Sorry, I don't have the tapered retainer yet so I don't know the specs.

    Alex
    Here ya go.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Picture 2.png 
Views:	49 
Size:	13.5 KB 
ID:	75785  
    Jim Hendricksen
    L-3 Tripoli 9693
    ICBM, Orangeburg SC - QCRS ,Princeton ILL - MDRA , Price Maryland - Woosh, Bong Wisconsin- ROCC, Charlotte NC
    "Made" member of Chicago & Carolina Rocket Mafia
    Rocketry...........an exact science.......but not exactly !!!

  10. #10
    Join Date
    13th February 2012
    Location
    Central Jersey
    Posts
    5,074
    I don't have any alternatives to suggest for nosecones, other than making one out of balsa or something, I was just stating the fact. I'm probably gonna have to use a Shockwave because the extreme compact size of my rocket requires the tracker to go in there.
    Two rocket motors burned this year.

  11. #11
    Join Date
    1st April 2011
    Location
    Utah / UROC
    Posts
    3,123
    Quote Originally Posted by bandman444 View Post
    So far I haven't seen any videos. Something wrong?
    Actually quite a few things went wrong.
    I wont make a video for this post because I dont see the point.

    I went to ace with my 29 3g casing to try to find a mandrel. I browsed around and found a 1in dowel that looked to be the same OD as the casing. It matched up pretty well, anyways. I took it home and wrapped it in plastic and made my fiberglass tube . Unfortunately, this tube was stuck to the mandrel. I filmed the process but will not post the video.

    The I went to ace again and bought the same mandrel. This time, I took it home and wrapped it in parchment paper. I gave it 3 wraps of 6oz glass. After the epoxy cured, the tube slid off and the parchement paper peeled off easily. However the tube was to small for my casing #$@@**!!!!!!!!!!!!!.

    Anyway, now i'm really pissed off.

    CHANGE OF PLAN.

    I do have a 29mm motor mount tube. I will peel off 75% of the outer layer on the tube. At this point, the tube will be very weak, flimsy and thin. I will wrap the tube in 3 layers of carbon fiber and voila! a 29mm carbon tube (well, almost).
    This way I dont have to worry about the fiberglass getting stuck or small mandrels.

    The catch is, the new tube is only 21in long, 8in shorter then the original tube. Still, it's stable and will work nicely.

    Does that sound like a good plan?


    Alex
    Subscribe to my Youtube Channel!
    NAR Jr. L1
    TRA Jr. Flier

  12. #12
    Join Date
    19th November 2009
    Location
    Brooklyn, NY
    Posts
    852
    Do you have digital calipers to measure the tubes?

  13. #13
    Join Date
    1st April 2011
    Location
    Utah / UROC
    Posts
    3,123
    Quote Originally Posted by New Ocean View Post
    Do you have digital calipers to measure the tubes?
    Sadly, no. I need to make a trip to harbor freight

    Wish me luck, I'll start on the tube soon.

    Alex
    Subscribe to my Youtube Channel!
    NAR Jr. L1
    TRA Jr. Flier

  14. #14
    Join Date
    13th February 2012
    Location
    Central Jersey
    Posts
    5,074
    May I ask, what made you think that 1" tubing would work as a mandrel for 29mm motors? 1" is 25.4mm.

    You probably should have looked into getting a properly sized mandrel before even buying the materials for the rocket.

    Anyway, the thin paper tube + carbon will probably work fine, just make sure that it's absolutely straight and still round after peeling off the outer layers. Are you using peel ply on the surface?
    Two rocket motors burned this year.

  15. #15
    Join Date
    1st April 2011
    Location
    Utah / UROC
    Posts
    3,123
    It's finshed. I only made one video but took lots of pictures, i'll put the video on first (making the tube) followed by the pictures.

    Hows about a teaser....
    Click image for larger version. 

Name:	IMG_4741.jpg 
Views:	128 
Size:	104.6 KB 
ID:	78064

    Alex
    Subscribe to my Youtube Channel!
    NAR Jr. L1
    TRA Jr. Flier

  16. #16
    Join Date
    6th February 2010
    Location
    Camarillo, CA
    Posts
    2,185
    Very pretty.

    I'm beginning to think this isn't going to be full of videos.

    Sorry to be a hardass. You promised videos galore.

    Bryce

    Bryce Chanes
    ROC Board Member
    NAR 89467, TRA 13928 L3
    KJ6TEC
    Follow me on: YouTube, Twitter, Google+, Facebook

    2011: 14,773Ns (44% N)
    2012: 38,670Ns (89% O)
    2013: 26,936Ns (32%O)
    2014: 7,392Ns (45%M)

    www.Project60k.com

  17. #17
    Join Date
    1st April 2011
    Location
    Utah / UROC
    Posts
    3,123
    Quote Originally Posted by bandman444 View Post
    Very pretty.

    I'm beginning to think this isn't going to be full of videos.

    Sorry to be a hardass. You promised videos galore.

    Bryce
    Sorry about that, videos are a pain in the butt to make! I've had every single video problem imaginable, my tripod broke, the camera needed a new battery (couldn't recharge) I spent several hours just TRYING to upload an hour and on top of that, our computer's memory was full so it deleted itself. Then about half an hour of editing and another hour of exporting, I spent twice as much time on the video then I did actually building! I realized that I couldn't build like this so I decited to make just one.

    Sorry for the dissapointment.

    Alex
    Last edited by Aksrockets; 14th April 2012 at 07:06 PM.
    Subscribe to my Youtube Channel!
    NAR Jr. L1
    TRA Jr. Flier

  18. #18
    Join Date
    20th January 2011
    Location
    Cache Valley, UT
    Posts
    916
    Looks awesome! When will it fly?

  19. #19
    Join Date
    1st April 2011
    Location
    Utah / UROC
    Posts
    3,123
    Quote Originally Posted by kenstarr View Post
    Looks awesome! When will it fly?
    I'll put it up on an H410 vmax at hellfire 17. Should be a nice little pop.

    Video is boring, just skim through it but it gives you a general idea....

    http://www.youtube.com/watch?v=q4nK2G26kX8



    Pictures to follow...

    Alex
    Subscribe to my Youtube Channel!
    NAR Jr. L1
    TRA Jr. Flier

  20. #20
    Join Date
    6th February 2010
    Location
    Camarillo, CA
    Posts
    2,185


    It looks great.

    What are your stats for the H410VM?

    Bryce Chanes
    ROC Board Member
    NAR 89467, TRA 13928 L3
    KJ6TEC
    Follow me on: YouTube, Twitter, Google+, Facebook

    2011: 14,773Ns (44% N)
    2012: 38,670Ns (89% O)
    2013: 26,936Ns (32%O)
    2014: 7,392Ns (45%M)

    www.Project60k.com

  21. #21
    Join Date
    1st April 2011
    Location
    Utah / UROC
    Posts
    3,123
    I expect about mach 1.3-1.5 ish and about 1 mile high. Some crazy acceleration, 0-mach 1.3 in .4 seconds (openrocket)

    After the tube was done, it was time to make the fins, I set a peice of parchemnt paper on a book and gave it a generous coat of epoxy. Then, I laminated a layer of carbon fiber. After the carbon i put on 12 layers of 6oz fiberglass. After the fiberglass came another layer of carbon. I pressed more parchment paper on top of that and set another book on top of that. I placed about 80lbs of weight on top of that.
    I got a nice, stiff carbon fiber-fiberglass sandwich. I took pictures of the entire process, unfortunately they were accidentally deleted.

    I cut the fins out using a jig saw.

    Click image for larger version. 

Name:	IMG_4688.jpg 
Views:	71 
Size:	127.2 KB 
ID:	78315

    Click image for larger version. 

Name:	IMG_4690.jpg 
Views:	78 
Size:	73.7 KB 
ID:	78316

    Click image for larger version. 

Name:	IMG_4695.jpg 
Views:	73 
Size:	174.1 KB 
ID:	78317

    Click image for larger version. 

Name:	IMG_4693.jpg 
Views:	86 
Size:	65.3 KB 
ID:	78318
    Subscribe to my Youtube Channel!
    NAR Jr. L1
    TRA Jr. Flier

  22. #22
    Join Date
    1st April 2011
    Location
    Utah / UROC
    Posts
    3,123
    I cut out a fin guide using The Payload Bay.com. The fin guide is made out of a shoe box and worked nicely. I roughed up the bottoms of the fins and attached them with CA.
    Click image for larger version. 

Name:	IMG_4702.jpg 
Views:	46 
Size:	112.6 KB 
ID:	78319

    Click image for larger version. 

Name:	IMG_4705.jpg 
Views:	46 
Size:	67.4 KB 
ID:	78320

    Click image for larger version. 

Name:	IMG_4710.jpg 
Views:	51 
Size:	78.9 KB 
ID:	78321

    Click image for larger version. 

Name:	IMG_4715.jpg 
Views:	55 
Size:	64.2 KB 
ID:	78322
    Subscribe to my Youtube Channel!
    NAR Jr. L1
    TRA Jr. Flier

  23. #23
    Join Date
    1st April 2011
    Location
    Utah / UROC
    Posts
    3,123
    After that was the Chopped Carbon fillets. I mixed finely chopped carbon with proline thin epoxy resin and smeared it along the spot where the fin meets the BT. This created very strong (but ugly) fillets.
    Click image for larger version. 

Name:	IMG_4718.jpg 
Views:	80 
Size:	130.2 KB 
ID:	78323

    Click image for larger version. 

Name:	IMG_4719.jpg 
Views:	75 
Size:	78.3 KB 
ID:	78324


    Alex
    Subscribe to my Youtube Channel!
    NAR Jr. L1
    TRA Jr. Flier

  24. #24
    Join Date
    1st April 2011
    Location
    Utah / UROC
    Posts
    3,123
    After the carbon fiber fillets came the cosmetic fillets. I wanted a black epoxy but did not have any thick proline on hand. So, I mixed super fine graphite with epoxy and used that. It's glass smooth and has a nice dark black color. IT smoothed out nicely and created good, clean fillets.

    Click image for larger version. 

Name:	IMG_4739.jpg 
Views:	75 
Size:	52.5 KB 
ID:	78325

    Click image for larger version. 

Name:	IMG_4741.jpg 
Views:	81 
Size:	104.6 KB 
ID:	78326

    Alex
    Subscribe to my Youtube Channel!
    NAR Jr. L1
    TRA Jr. Flier

  25. #25
    Join Date
    1st April 2011
    Location
    Utah / UROC
    Posts
    3,123
    After the fillets, it was time for finishing.

    I sanded down the tube, first with 220 grit, to remove the rough texture, I worked my way up to a 400grit wet sand.

    After the wet sand I applied 3 coats of Rustoleum clear gloss with the following results:

    Click image for larger version. 

Name:	IMG_4720.jpg 
Views:	94 
Size:	198.5 KB 
ID:	78327

    Click image for larger version. 

Name:	IMG_4750.jpg 
Views:	85 
Size:	168.0 KB 
ID:	78328

    Click image for larger version. 

Name:	IMG_4746.jpg 
Views:	113 
Size:	170.5 KB 
ID:	78329


    Still waiting on an NC
    Alex
    Subscribe to my Youtube Channel!
    NAR Jr. L1
    TRA Jr. Flier

  26. #26
    Join Date
    13th February 2012
    Location
    Central Jersey
    Posts
    5,074
    If you put peel ply on chopped carbon fillets, it keeps them smooth without them needing as much of a cosmetic layer on top.
    Two rocket motors burned this year.

  27. #27
    Join Date
    1st April 2011
    Location
    Utah / UROC
    Posts
    3,123
    Quote Originally Posted by CarVac View Post
    If you put peel ply on chopped carbon fillets, it keeps them smooth without them needing as much of a cosmetic layer on top.
    I would have never thought of that.
    I kind of just wanted to try out the graphite/epoxy mix and I think it turned out quite nicely. Sure, Proline would be stronger but this is fine for now. The fins are ROCK SOLID also, not even the slightest wiggle. This thing is built like a tank. She'll look even better with a shock wave nose cone. I just got allowance (yes, i still get that, I'm 15) so I'll purchace one shortly.

    I'll try again with some pics that didnt upload the first time...





    Alex
    Subscribe to my Youtube Channel!
    NAR Jr. L1
    TRA Jr. Flier

  28. #28
    Join Date
    13th February 2012
    Location
    Central Jersey
    Posts
    5,074
    You can also adjust the epoxy:filler ratio to be much, much much leaner on epoxy, keeping the fillet weight down while keeping the strength up.
    Two rocket motors burned this year.

  29. #29
    Join Date
    1st April 2011
    Location
    Utah / UROC
    Posts
    3,123
    Well, it's pretty much finished.
    I received my shockwave 29mm NC. It's good quality, fells very sturdy and pretty smooth. No gel coat.
    I spread some bondo on the high spots and primered with Rustoleum 2x grey. I gave it a coat of rustoleum 2x aluminum and it was done!

    Click image for larger version. 

Name:	IMG_0420.jpg 
Views:	63 
Size:	165.3 KB 
ID:	79730

    I masked off the fin can and painted one of the fins aluminum with a little pointy thingy.

    Click image for larger version. 

Name:	IMG_0406.JPG 
Views:	70 
Size:	179.1 KB 
ID:	79732

    I made my own decals with chrome monokote trim. I printed out what I wanted, taped it to the Monokote and used a hobby knife to cut out the letters.

    Click image for larger version. 

Name:	IMG_0408.JPG 
Views:	66 
Size:	334.0 KB 
ID:	79731

    I dont think I did to bad. Well worth a few weekends and $50!
    Click image for larger version. 

Name:	IMG_0401.jpg 
Views:	85 
Size:	106.6 KB 
ID:	79733
    Click image for larger version. 

Name:	IMG_0413.jpg 
Views:	84 
Size:	286.9 KB 
ID:	79734

    More pics in the next post!
    Alex
    Subscribe to my Youtube Channel!
    NAR Jr. L1
    TRA Jr. Flier

  30. #30
    Join Date
    6th February 2010
    Location
    Camarillo, CA
    Posts
    2,185
    Wow that looks great!

    Hopefuly you get it back so you can fly it more than once! :P



    Bryce

    Bryce Chanes
    ROC Board Member
    NAR 89467, TRA 13928 L3
    KJ6TEC
    Follow me on: YouTube, Twitter, Google+, Facebook

    2011: 14,773Ns (44% N)
    2012: 38,670Ns (89% O)
    2013: 26,936Ns (32%O)
    2014: 7,392Ns (45%M)

    www.Project60k.com

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •