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  1. #1

    Bucky Jones (PemTech) build thread

    Just started on the Pemberton Technologies' Bucky Jones kit. This is the original mid-power version of the kit.

    This a rocket I wanted as soon as I saw it! I love curvy fins and this has some great ones. It's styling is unique and futuristic. It is 3" in diameter with a 29mm motor mount.

    Bought the kit in December and am just starting it now. It's about third priority on the rocket projects I'm working on so it may take awhile. However, I'll periodically post my comments along the way.

    Here's a photo:


    Jim


  2. #2

    First Impression: Great Kit!

    Below is a photo of the kit as it arrives.

    I found the components of very good quality.
    - Centering Rings are 3/16" plywood
    - Fins are 1/8" plywood
    - Top-Flight nylon parachute, and a serious nylon shock cord
    - Heavy Duty body tube and motor mount

    I've read the instructions through and they are GREAT! Very detailed (42 steps!) including lots of photos. What sets them apart is that they are also hilarious! Layne's humor keeps 'em fun.

    The CD is a novel add-in. It contains all the instructions in DOC and PDF format, a RockSim file of the design, and a demo copy of RockSim.

    The build starts by cutting the body tube at an angle using the provided template.

    <img src="http://www.rocketryforum.com/attachment.php?attachmentid=40479&d=1180847252">

    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  3. #3
    Join Date
    22nd January 2009
    Location
    Cairns, Australia
    Posts
    761
    I got mine back in December, too (#14). And, like you, I also had to have it as soon as I saw it. I've been holding off building it until I have my motor situation sorted out (should be soon now). I'm looking forward to reading about your build.
    Matthew Small

    Lucky I like long walks in the countryside.

    http://australianrocketry.org/

  4. #4

    I'll be following your thread closely

    I WON a mid-power Bucky Jones at the last S.P.A.R.C. Launch!!! This is my first mid-power kit with a 29mm mmt & I can't believe the great quality of the kit! As stated, that's a serious shock-cord!!!Don't have to worry about that sucker breaking! The bright yellow ripstop chute is beautiful & the highest quality. The dvdrom is a really neat extra too. I got # 20, written on the header in sharpie!
    I've made a couple of threads in the past about getting ready to build a mid-power rocket (other than 24mm E) but never carried through with them. This will be my first true 29mm mid-power kit! Talk about doing it in style!!!Have you seen those gorgeous lines again! I'm a little scared though..........this will probably open up the floodgates on APCP.
    -In the picture, couldn't ya just see "the wires suspending the rocket & the sparks shooting out the multiple engines"!
    OMG-I just checked out the website link & it's an $80 rocket. It's well worth it, though! No corners cut here. I'm just shocked that I won it!!!

  5. #5
    I think it's definitely worth the $79. I've built quite a few mid and high-power custom rockets. Making fins like this on your own without snapping off the fin tip is very hard. This kit's quality components aren't cheap. It's a great design, top notch materials, and I expect to keep it a long time. [Provided I don't get crazy with an H97J at NERRF].

    FWIW, mine is #12.

    Jim

  6. #6

    Let's check out PemTech's customer support...

    Well I got the tubes sanded, the angled cut done on the BT and started on the fin slotting.

    Unfortunately, when I looked more closely at the kit's contents I found that one of the components is incorrect or missing. I've written PemTech support (presumably, Layne) and so we'll get a chance to check out their support.

    Of course, I didn't want to make it too easy for Layne. I just told him he should be able to figure out what's wrong from looking at the photo above!

    It'd be nice to get this done in time for NERRF but I have a PML Cirrus Dart to finish (actually, I haven't started it), two electronics bays to complete, three rockets to paint, two birthday parties to throw, and a ton of poison ivy to pick from around my house. Wish me luck!

    Jim

  7. #7
    Join Date
    18th January 2009
    Location
    Haverhill, MA
    Posts
    1,331
    Jim,

    I hope you do get this done for NERRF, I'd like to see it.
    I haven't had the chance to see a PemTech kit.
    I've got one of the new Space Arc Jr.s coming next week.
    Tony Vincent
    NAR 45082 L1
    Member CMASS & MMMSC

  8. #8
    Join Date
    22nd January 2009
    Location
    Cairns, Australia
    Posts
    761

    Re: Let's check out PemTech's customer support...

    Originally posted by jcsalem
    Unfortunately, when I looked more closely at the kit's contents I found that one of the components is incorrect or missing. I've written PemTech support (presumably, Layne) and so we'll get a chance to check out their support.

    Of course, I didn't want to make it too easy for Layne. I just told him he should be able to figure out what's wrong from looking at the photo above!
    Hehe. So I'm not going mad after all. I noticed that earlier. Perhaps you got the unmanned version?

    Actually, there looks to be a couple of differences in our kits. I'll try and get a photo and post it later.

    btw - Layne travelled to NSL for the w/e, so he might be away from a computer for a few days.

    It'd be nice to get this done in time for NERRF but I have a PML Cirrus Dart to finish (actually, I haven't started it), two electronics bays to complete, three rockets to paint, two birthday parties to throw, and a ton of poison ivy to pick from around my house. Wish me luck!
    Good luck! I wasn't kidding when I said I'm keen to see your build. GLR claim that the Talon is the world's sexiest rocket, but with the BJ-SC I think it has serious competition.

    Rob, you lucky dog! You won yours. I think I could say that I stole mine.
    Matthew Small

    Lucky I like long walks in the countryside.

    http://australianrocketry.org/

  9. #9
    Join Date
    20th January 2009
    Posts
    4,234
    OK Jim...
    I'm busted....
    Or rather the QC Gnomes are busted!
    Have to spank their little hind-ends.
    You replacement part went out this morning USPS Priority mail.

    Bad Gnomes..
    Bad Gnomes..
    Layne Pemberton NAR# 83083
    Mad Scientist, Minion and Owner
    PembertonTechnologies.com
    P.O. Box 250760
    North Little Rock AR, 72225

    L1 on Pem-Tech Space Ark

    pem_tech (at) Yahoo (dot) com
    TRF (at) pembertontechnologies (dot) com
    ---------------------------------------------------

    L2 - CTI Certify With Us - 4" HMAS Bonestell build

    Under Development: Marza as of 04/29/06, Ten-Ten (10-10) as of 03/01/07, LPR M2-Mars Challenger 04/17/07, Starship Achilles as of 07/30/07, Goonie Kraken as of 07/12/08 (Thanks to Jewel Barton), The Gorgon as of 02/12/2010, Sorta' Saturn VII Gemini Launch Vehicle as of 08/08, Lemon Aid as of 08/15/08, Arcturus as of 08/25/06, MPR Bonestell
    as of 1/21/07, Orion Boom-Boom as of 07/01/08,Gorgon 2010

  10. #10
    Join Date
    19th January 2009
    Location
    New Lebanon, OH
    Posts
    3,100
    I won one of these at NSL - I think I'm going to work on it next.

    Layne: The nose weight bag. What is this stuff, or should I say, how did you get tear-shaped lead? Do you have a pet lead monster in your basement, and you told him something to make him cry? Or did the Underpants Gnomes give him a painful wedgie?
    NAR# 86830 Level 1 (25 Mar 2007)
    Member TORC 703, QUARK 624

  11. #11
    Join Date
    20th January 2009
    Posts
    4,234
    Originally posted by DaveCombs
    I won one of these at NSL - I think I'm going to work on it next.

    Layne: The nose weight bag. What is this stuff, or should I say, how did you get tear-shaped lead? Do you have a pet lead monster in your basement, and you told him something to make him cry? Or did the Underpants Gnomes give him a painful wedgie?
    Lead Monster wedgies?
    And I thought I was disturbed.....
    Layne Pemberton NAR# 83083
    Mad Scientist, Minion and Owner
    PembertonTechnologies.com
    P.O. Box 250760
    North Little Rock AR, 72225

    L1 on Pem-Tech Space Ark

    pem_tech (at) Yahoo (dot) com
    TRF (at) pembertontechnologies (dot) com
    ---------------------------------------------------

    L2 - CTI Certify With Us - 4" HMAS Bonestell build

    Under Development: Marza as of 04/29/06, Ten-Ten (10-10) as of 03/01/07, LPR M2-Mars Challenger 04/17/07, Starship Achilles as of 07/30/07, Goonie Kraken as of 07/12/08 (Thanks to Jewel Barton), The Gorgon as of 02/12/2010, Sorta' Saturn VII Gemini Launch Vehicle as of 08/08, Lemon Aid as of 08/15/08, Arcturus as of 08/25/06, MPR Bonestell
    as of 1/21/07, Orion Boom-Boom as of 07/01/08,Gorgon 2010

  12. #12
    Thanks, Layne! [For those who were wondering, my kit had two dorsal fins and just one wing. The fin tabs are in different places.]

    Since DaveCombs mentioned the nose weight, I was wondering if I needed all of it or if you're being extra-conservative? It seems like quite a bit for a rocket with large fins that extend well behind the motor. How much do you trust the RockSim-calculated CP?

    Thanks again!

    Jim

  13. #13
    Join Date
    20th January 2009
    Posts
    4,234
    Originally posted by jcsalem
    Thanks, Layne! [For those who were wondering, my kit had two dorsal fins and just one wing. The fin tabs are in different places.]

    Since DaveCombs mentioned the nose weight, I was wondering if I needed all of it or if you're being extra-conservative? It seems like quite a bit for a rocket with large fins that extend well behind the motor. How much do you trust the RockSim-calculated CP?

    Thanks again!

    Jim
    From a fliers standpoint, with that nose weight she has flown on everything from a 24mm F-39, through an F40, F52, G64 to a G77 at NSL. So it seems to work quite well.
    From a Company Spokesman point of view, USE IT ALL! We at Pem Tech cannot be responsible for damages, fire, earthquakes or speared cattle due to a lack of nose weight.
    Layne Pemberton NAR# 83083
    Mad Scientist, Minion and Owner
    PembertonTechnologies.com
    P.O. Box 250760
    North Little Rock AR, 72225

    L1 on Pem-Tech Space Ark

    pem_tech (at) Yahoo (dot) com
    TRF (at) pembertontechnologies (dot) com
    ---------------------------------------------------

    L2 - CTI Certify With Us - 4" HMAS Bonestell build

    Under Development: Marza as of 04/29/06, Ten-Ten (10-10) as of 03/01/07, LPR M2-Mars Challenger 04/17/07, Starship Achilles as of 07/30/07, Goonie Kraken as of 07/12/08 (Thanks to Jewel Barton), The Gorgon as of 02/12/2010, Sorta' Saturn VII Gemini Launch Vehicle as of 08/08, Lemon Aid as of 08/15/08, Arcturus as of 08/25/06, MPR Bonestell
    as of 1/21/07, Orion Boom-Boom as of 07/01/08,Gorgon 2010

  14. #14
    Join Date
    20th January 2009
    Posts
    4,234
    Originally posted by DaveCombs
    I won one of these at NSL - I think I'm going to work on it next.

    Layne: The nose weight bag. What is this stuff, or should I say, how did you get tear-shaped lead? Do you have a pet lead monster in your basement, and you told him something to make him cry? Or did the Underpants Gnomes give him a painful wedgie?
    Actually, using a butane torch I melt lead ingots suspended about one inch over a container of water. The drops don't splatter and solidify into those cool Lead Monster Tears.

    Though I do like the wedgie idea.
    Layne Pemberton NAR# 83083
    Mad Scientist, Minion and Owner
    PembertonTechnologies.com
    P.O. Box 250760
    North Little Rock AR, 72225

    L1 on Pem-Tech Space Ark

    pem_tech (at) Yahoo (dot) com
    TRF (at) pembertontechnologies (dot) com
    ---------------------------------------------------

    L2 - CTI Certify With Us - 4" HMAS Bonestell build

    Under Development: Marza as of 04/29/06, Ten-Ten (10-10) as of 03/01/07, LPR M2-Mars Challenger 04/17/07, Starship Achilles as of 07/30/07, Goonie Kraken as of 07/12/08 (Thanks to Jewel Barton), The Gorgon as of 02/12/2010, Sorta' Saturn VII Gemini Launch Vehicle as of 08/08, Lemon Aid as of 08/15/08, Arcturus as of 08/25/06, MPR Bonestell
    as of 1/21/07, Orion Boom-Boom as of 07/01/08,Gorgon 2010

  15. #15
    Join Date
    19th January 2009
    Location
    New Lebanon, OH
    Posts
    3,100
    Originally posted by Pem Tech
    And I thought I was disturbed.....
    You have no idea... To wit: I had imagined they were made exactly the way you describe, by letting hot lead fall into water.

    The sick part? Guess where I was when I had that picture form in my head...

    Everyone take a moment to call your respective therapist to get that image out of your heads.
    NAR# 86830 Level 1 (25 Mar 2007)
    Member TORC 703, QUARK 624

  16. #16
    Join Date
    20th January 2009
    Posts
    4,234
    Originally posted by DaveCombs
    You have no idea... To wit: I had imagined they were made exactly the way you describe, by letting hot lead fall into water.

    The sick part? Guess where I was when I had that picture form in my head...

    Everyone take a moment to call your respective therapist to get that image out of your heads.


    Would someone please gouge out my minds' eye, please?
    Layne Pemberton NAR# 83083
    Mad Scientist, Minion and Owner
    PembertonTechnologies.com
    P.O. Box 250760
    North Little Rock AR, 72225

    L1 on Pem-Tech Space Ark

    pem_tech (at) Yahoo (dot) com
    TRF (at) pembertontechnologies (dot) com
    ---------------------------------------------------

    L2 - CTI Certify With Us - 4" HMAS Bonestell build

    Under Development: Marza as of 04/29/06, Ten-Ten (10-10) as of 03/01/07, LPR M2-Mars Challenger 04/17/07, Starship Achilles as of 07/30/07, Goonie Kraken as of 07/12/08 (Thanks to Jewel Barton), The Gorgon as of 02/12/2010, Sorta' Saturn VII Gemini Launch Vehicle as of 08/08, Lemon Aid as of 08/15/08, Arcturus as of 08/25/06, MPR Bonestell
    as of 1/21/07, Orion Boom-Boom as of 07/01/08,Gorgon 2010

  17. #17
    Originally posted by Pem Tech
    Actually, using a butane torch I melt lead ingots suspended about one inch over a container of water. The drops don't splatter and solidify into those cool Lead Monster Tears.

    Though I do like the wedgie idea.
    Huh, i wondered how you did that!

  18. #18

    got a bit more done on the Bucky this weekend...

    A full replacement set of fins arrived from Layne on Friday. They're laser cut now. Very nice...

    I made a bit of progress over the weekend. Got the fins sanded, fin slots cut into the BT, and carved the little swept-back "nose probes" out of the basswood stock. [Gack! Isn't there a better name than "nose probe"?]

    I cut the TTW fin slots using an Xacto blade. It would've been faster with the Dremel but it's loud and I'm more prone to error with it.

    It looks like I have a bunch of tricky steps ahead that involve assembling parts but only gluing some of them together and then removing the unglued parts. Given how messy I tend to work, this should be interesting.

    I'm also trying to decide whether to foam the fin can as the instructions state or to just epoxy fiberglass strips over the fin tab-MMT junctions. The latter is lighter and seems to be at least as reliable. I've had problems in the past where a fin would break away from the MM tube inside a foamed fin can. Having the fin can foamed made the repair much more difficult. On the other hand, fiberglassing six fin-MMT junctions takes alot longer than just pouring in the two part foam. On the other hand, it's hard to judge the amount of foam and I often end up having to scrape out the extra which is a pain.

    Jim

    PS: I'll add a photo of my "dry fit" later tonight.

  19. #19
    Join Date
    20th January 2009
    Posts
    4,234

    Re: got a bit more done on the Bucky this weekend...

    Originally posted by jcsalem
    A full replacement set of fins arrived from Layne on Friday. They're laser cut now. Very nice...
    Those are cut by our very own Don of Squirrel Works fame!


    Originally posted by jcsalem
    I made a bit of progress over the weekend. Got the fins sanded, fin slots cut into the BT, and carved the little swept-back "nose probes" out of the basswood stock. [Gack! Isn't there a better name than "nose probe"?]
    You know you like that name....
    Admit it...


    Originally posted by jcsalem

    I'm also trying to decide whether to foam the fin can as the instructions state or to just epoxy fiberglass strips over the fin tab-MMT junctions. The latter is lighter and seems to be at least as reliable. I've had problems in the past where a fin would break away from the MM tube inside a foamed fin can. Having the fin can foamed made the repair much more difficult. On the other hand, fiberglassing six fin-MMT junctions takes alot longer than just pouring in the two part foam. On the other hand, it's hard to judge the amount of foam and I often end up having to scrape out the extra which is a pain.
    A beta tester of ours has explored other means of affixing the fins inside the fin can. Once method is to epoxy large diameter dowel rods on either side of the TTW tab. Fiberglassing would surely work as well, and I would guess be stronger than foam.
    Layne Pemberton NAR# 83083
    Mad Scientist, Minion and Owner
    PembertonTechnologies.com
    P.O. Box 250760
    North Little Rock AR, 72225

    L1 on Pem-Tech Space Ark

    pem_tech (at) Yahoo (dot) com
    TRF (at) pembertontechnologies (dot) com
    ---------------------------------------------------

    L2 - CTI Certify With Us - 4" HMAS Bonestell build

    Under Development: Marza as of 04/29/06, Ten-Ten (10-10) as of 03/01/07, LPR M2-Mars Challenger 04/17/07, Starship Achilles as of 07/30/07, Goonie Kraken as of 07/12/08 (Thanks to Jewel Barton), The Gorgon as of 02/12/2010, Sorta' Saturn VII Gemini Launch Vehicle as of 08/08, Lemon Aid as of 08/15/08, Arcturus as of 08/25/06, MPR Bonestell
    as of 1/21/07, Orion Boom-Boom as of 07/01/08,Gorgon 2010

  20. #20

    Dry fit photo...

    Here's a photo of the dry fit (pre-glue) assembly. You can see those scary nose probes lying on either side of the rocket.

    <img src="http://www.rocketryforum.com/attachment.php?attachmentid=40769&d=1181622018">

    BTW, I always use a belt sander to round the edges of plywood fins. It's quick and easy.

    Jim
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  21. #21
    I picked up a Bucky Jones and a Jr at NSL and they have come up on my building queue. I totally messed up the fins on the Jr so I will need to pick up more plywood stock.

    But my Bucky Jones is proceeding great. Fins dry mount nicely, the exhaust tubes look great, and the MMT is made for Econojets.

    I think I like the look without the nose cone fins so will probably skip those.

    I will post some photos tomorrow night.

    If I epoxy the fins with the fillets inside the BT, can I skip the whole foam thing?

    James.
    James Kalemis
    http://www.kalemis.com/rockets/index.htm

  22. #22
    Join Date
    20th January 2009
    Posts
    4,234
    Originally posted by jimmyk
    I picked up a Bucky Jones and a Jr at NSL and they have come up on my building queue. I totally messed up the fins on the Jr so I will need to pick up more plywood stock.

    But my Bucky Jones is proceeding great. Fins dry mount nicely, the exhaust tubes look great, and the MMT is made for Econojets.

    I think I like the look without the nose cone fins so will probably skip those.

    I will post some photos tomorrow night.

    If I epoxy the fins with the fillets inside the BT, can I skip the whole foam thing?

    James.
    You can skip the foam, it is just structural reenforcement for the TTW tabs, but make sure you do some honkin' fillets cause if a TTW tab breaks loose there is no way to get to it.

    Send me your address and I'll ship you out more ply for the Little Bucky, no charge.

    Can't wait for the pics!
    Layne Pemberton NAR# 83083
    Mad Scientist, Minion and Owner
    PembertonTechnologies.com
    P.O. Box 250760
    North Little Rock AR, 72225

    L1 on Pem-Tech Space Ark

    pem_tech (at) Yahoo (dot) com
    TRF (at) pembertontechnologies (dot) com
    ---------------------------------------------------

    L2 - CTI Certify With Us - 4" HMAS Bonestell build

    Under Development: Marza as of 04/29/06, Ten-Ten (10-10) as of 03/01/07, LPR M2-Mars Challenger 04/17/07, Starship Achilles as of 07/30/07, Goonie Kraken as of 07/12/08 (Thanks to Jewel Barton), The Gorgon as of 02/12/2010, Sorta' Saturn VII Gemini Launch Vehicle as of 08/08, Lemon Aid as of 08/15/08, Arcturus as of 08/25/06, MPR Bonestell
    as of 1/21/07, Orion Boom-Boom as of 07/01/08,Gorgon 2010

  23. #23

    A little progress...

    Here's a photo of the completed nose cone work. There were two parts:

    1) Added nose weight. In addition to following Layne's "destructions", I scuffed up the interior of the nosecone's tip so the epoxy would bond better. Used sandpaper attached to a thin dowel.

    2) Created a new shock cord attachment point by cutting slits in the bottom of the nose cone using a Dremel tool. This is a very good idea to avoid the flimsy plastic "eye" on the end of the nose cone. To see the difference, compare the parts photo of the nose cone above to this one.

    <img src="http://www.rocketryforum.com/attachment.php?attachmentid=41025&d=1182291269">

    Jim
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  24. #24
    This photo shows a couple views of the motor retainer glued onto the motor mount tube. The bottom photo shows the retainer with a 29/120 casing installed (I want to fly the Bucky on a G77R sometime!)

    As you can see, it's just a thick wire bent around the motor and epoxied to the motor mount tube. Although the retainer looks non-standard, it lies inbetween the "exhaust tubes" better than a thick engine hook like AT uses. For larger motors, it will be more reliable than the thin LPR (Estes) engine hooks.

    The destructions said to just epoxy the wires to the tube. However, I put a little scrap fiberglass on top of the bond to distribute the force across more of the tube. To make sure the wires fit inbetween the exhaust tubes, I first placed the tubes around the MMT and marked where I should glue the wire. I cut the notches into the centering ring using a round hobby file.

    At the top of the photo are the "exhaust tubes" that surround the MMT. To get straight cuts on the BT-20 sized tubes, I used a tube I got from ASP that narrowly fits over a BT-20. This let me draw a perfectly straight line around the tube.

    <img src="http://www.rocketryforum.com/attachment.php?attachmentid=41026&d=1182292308">

    I'm going to take a break on the Bucky J until NERRF is over. See ya next week!

    Jim
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  25. #25
    Originally posted by jcsalem
    I'm going to take a break on the Bucky J until NERRF is over. See ya next week!

    Jim
    So we won't see it at NERRF but do you think it'll be ready for the July Amesbury launch?
    Bob Harrington
    NAR #62740 L1
    AMA #46042
    CMASS & RIMRA Member

  26. #26
    Originally posted by BobH48
    So we won't see it at NERRF but do you think it'll be ready for the July Amesbury launch?
    Definitely, if I'm in town for it! I'm still planning to have it for the CMASS Acton launch on June 30th.

  27. #27
    Well, here is mine dry fitted.

    James Kalemis
    http://www.kalemis.com/rockets/index.htm

  28. #28
    And the business end.

    James Kalemis
    http://www.kalemis.com/rockets/index.htm

  29. #29
    Join Date
    22nd January 2009
    Location
    Cairns, Australia
    Posts
    761
    Such a sweet looking design. The moon and stars are finally starting to align for me, so I'm hoping to get started on mine soon.
    Matthew Small

    Lucky I like long walks in the countryside.

    http://australianrocketry.org/

  30. #30

    Re: Retainer

    So having that wire in front of the jet plume won't affect anything?


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