Lakeroadster's Lifting Rocket

Discussion in 'Scratch Built' started by lakeroadster, Dec 27, 2018.

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  1. Mar 11, 2019 #241

    neil_w

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    What's your speed off the rod? I'd be nervous about asking a single E15 to lift a 1 lb rocket.

    Also, when simming with the E15, be careful about which version you use, there is an old and a new, I forget how to tell which is which. o_O
     
    Last edited: Mar 11, 2019
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  2. Mar 11, 2019 #242

    Scotty Dog

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    As we say up here in New England (Massachusetts and north is true New England to us) that rocket is "Wicked Pissa" . And then ad all the detail drawings , professional work all around. I've been watching from afar for sometime now. Again,thanks for posting all the detail drawings. WOW ! Me-self and computers, or any electronic devise for that matter do not play well together.
     
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  3. Mar 11, 2019 #243

    lakeroadster

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    Thanks again Neil. 28 ft/s off the rod is a bit slow using the E15 (it would look awesome though). The E30 is much better at 42 ft/s

    Thanks. I've been a CAD Monkey since the early 1980's.. without it I feel like one hand is tied behind my back. I've seen your work here... You sir are a steely eyed model rocket wizard.
     
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  4. Mar 11, 2019 #244

    BABAR

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    How big is your recovery field? Are you gonna get this back if it goes to 1200 feet with the Full Monte?
    An option with a central E that can do the job itself would be put adapters in the clusters for A4-3Ts for show. They won't boost your altitude much, they shouldn't cause much of a problem with eccentric thrust if one or more doesn't light (and likely won't even take it off the pad IF the E doesn't light, so less likely to land shark), and they will still look cool.
     
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  5. Mar 11, 2019 #245

    lakeroadster

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    It shouldn't be a problem.... knock on wood. Thanks for your input.
     
  6. Mar 13, 2019 #246

    lakeroadster

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    In an attempt to add some detail to the Mercury capsule I searched for details on the dimple pattern that was used back in the day.

    I found a nice card stock template that had some pretty good detail. The plan is to basically "decoupage" these onto the balsa nose cone and then clear coat it with the same spar urethane I'm planning to use on the fins.

    Below are a few iterations of the wraps. I think I like the plain black the best. What's your thoughts?

    I did the decoupage thing last April on an enclosure I made to protect the plastic oil reservoir on my 2-post lift. Basically the same concept: Use thinned Elmers white glue to attach the paper to the wood, then apply the spar urethane.


    Mercury Capsule Template.jpg TLR-2 REV 01 Sheet 8 of 8.pdf.jpg 004.JPG 003.JPG 002.JPG 001.JPG Guard 001 2.jpg
     
    Last edited: Mar 13, 2019
  7. Mar 13, 2019 #247

    BABAR

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    try it on a scrap piece of balsa first to see how the decoupage and the printer ink get along.
     
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  8. Mar 13, 2019 #248

    neil_w

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    Is "plain black" what is shown in the first two pictures? If so that is my favorite as well. Are you going to get rid of the black-on-black text or leave it as shown?
     
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  9. Mar 13, 2019 #249

    lakeroadster

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    Sound advice!

    I'm not sure what's up with the text.. it looks good in the CAD Model, but not in the printed version. I posted a screen grab below. I think I may have to go in and outline the text in white.

    Here's the mock up of the other wraps. Needs a bit of fine tuning but it's coming along nicely. I'll need to paint some of the areas that end up uncovered black, maybe before doing the decoupage?

    002.JPG 001.JPG TLR-2 REV 01 Sheet 8 of 8.pdf.jpg Mercury Capsule Template.jpg
     

    Attached Files:

    Last edited: Mar 13, 2019
  10. Mar 13, 2019 #250

    neil_w

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    That looks really good.
     
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  11. Mar 14, 2019 #251

    lakeroadster

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    Well... that was easy. I just used Elmers White Glue. The glue softened the paper and made it super easy to get a good tight.

    After a few coats of spar urethane I'll paint the tip grey, the silver and the red stripe near the base.

    Remember the goal is to simulate a rocket made from salvage yard Mercury / Gemini / Apollo parts, crusty steam punk look. This should fit that spec.


    001.JPG Mercury Friendship 7.jpg Gemini 8 Capsule – 1966.jpg
     
    Last edited: Mar 14, 2019
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  12. Mar 14, 2019 #252

    Bruiser

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    Came out great!

    -Bob
     
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  13. Mar 14, 2019 #253

    mbeels

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    That looks fantastic!
     
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  14. Mar 14, 2019 #254

    Crawf56

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    That is the same thing I experienced with my Estes Saturn V.
     
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  15. Mar 16, 2019 #255

    lakeroadster

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    SRB nozzle shrouds. I made some 1/2" balsa plywood, then cut the shrouds using a jigsaw, and sanded them on a belt sander. I'll install them after I fill and finish the cluster area of the rocket. That way they won't get in the way during finishing.

    002.JPG 004.JPG 005.JPG 006.JPG
    _____________________________________________________________________
    Also shot some clear on the Mercury capsule. I ended up using Rustoleum 2X Clear instead of Spar Urethane... because... I've used it for sealing decals and I had a can available.

    When I first sprayed it on the test piece it was splotchy looking. I was a bit discouraged.:( But once the clear soaked into the paper the blotches went away. :cool:

    007.JPG 008.JPG

    009.JPG
     
    Last edited: Mar 19, 2019
  16. Mar 23, 2019 #256

    lakeroadster

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    I bought a used wood lathe this week. Wood turning is another hobby from my youth that I've been wanting to get back into. And it'll also be useful for my scratch built rockets.

    Case in point: I needed some centering rings to mount the BT-50 motor tubes in the BT-52 cluster tubes. Now these are some pretty delicate centering rings, 1.140 OD x 0.970 ID. That means they are only 0.085 wall.

    1st Lathe Project!

    I made a mandrel using a piece of BT-50, slid the centering rings on and secured them with a couple wraps of blue painters tap. Then put this assembly in the wood lathe, sanded the ring OD with 80 grit until it was close, then finished the OD with a file.

    Easy Peazy...

    Once I get my lathe tools I'm wanting to make some wooden mandrels so I can make more pieces parts like these.. as well as nose cones, transitions, etc.

    Here's the mandrel with rings, & the rocket cluster section. See how the rings are too big for the BT-52 cluster tube.
    010.JPG
    ______________________________________________

    Here's the lathe it's a Jet JWL-1236. It's really in excellent shape. And the guy I got it from was 4 miles from my home.
    013.JPG
    _____________________________________________

    Here's the BT-50 Mandrel and Centering Rings, before and after
    012.JPG 014.JPG 015.JPG 016.JPG
    __________________________________________

    Now the rings fit great.
    017.JPG
    __________________________________________

    Check out how thin the rings are.. The ring at the top is a std BT-50 to BT-60 which is what I modified.
    018.JPG
     
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  17. Mar 24, 2019 #257

    lakeroadster

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    Boring motor mount stuff... But my custom centering rings worked most excellent!

    001.JPG 002.JPG 002A.JPG 003.JPG 004.JPG
     
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  18. Mar 25, 2019 #258

    lakeroadster

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    Finally got a day with temp's above 50 F.... Put 1st coat of Helmsman Spar Urethane on the fins. Love how it makes the wood grain "pop".

    001.JPG
     
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  19. Mar 25, 2019 #259

    Nytrunner

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    What wood type is that again?
     
  20. Mar 25, 2019 #260

    lakeroadster

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    Just regular balsa... 3 pieces of 1/8" glued together, each fin.
     
  21. Mar 27, 2019 #261

    lakeroadster

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    Painted the Gunmetal, Silver and Red to the Mercury Capsule. The red is too large, but once I shoot the copper on the body tube I'll mask the red to be a thin stripe.

    Then I'll shoot some clear over it ... that way the "sheen" will be uniform. Good enough ;-)

    001.JPG

    Mercury Friendship 7.jpg
     
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  22. Apr 8, 2019 #262

    lakeroadster

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    Sanded transitions today and the applied a liberal amount of CA to them (and my finger). ;)

    Hoping to get some paint on this before the next snow storm rolls in later this week.

    001.JPG
     
  23. Apr 8, 2019 #263

    kuririn

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    Q tips are your friends!
     
    Last edited: Apr 8, 2019
  24. Apr 8, 2019 #264

    lakeroadster

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    I used them... ;)
     
  25. Apr 8, 2019 #265

    neil_w

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    How did you actually fabricate those? Did you need to do any tricks to keep the cardboard from creasing? How did you join the ends?
     
  26. Apr 8, 2019 #266

    Scotty Dog

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    For whatever reason, I seem to forget that I have a box full of nitrile gloves . I am reminded every time I play with CA when it comes time to sand my finger tips to get it off. And same goes when I am applying pigment. LOL. Cant teach and old dog new tricks I guess. LOL
     
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  27. Apr 11, 2019 #267

    lakeroadster

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    Check out post #228
     
  28. Apr 11, 2019 #268

    lakeroadster

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    Pardon my insanity..... :confused:

    https://news.yahoo.com/black-hole-seen-first-time-130916365.html

    The media frenzy surrounding the rendered Black Hole image (see above link) reminded me of a photo I took back when I was building the cluster section of this rocket.

    I spent 10 minutes on Ipiccy and low and behold... there is a Black Hole lurking within my Lifting Rocket.

    Lifting Rocket Black Hole.jpg

    The Real Black Hole.jpg
     
    Last edited: Apr 11, 2019
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  29. Apr 11, 2019 #269

    kuririn

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    There is another transition maker as well as a bunch of other tools here on Wayne Hill's blog:
    https://rocketry.wordpress.com/free-rocketry-tools/
    Might be easier to use than the UK one cuz you can enter the BT sizes instead of mm. Also shows how you can use a separate glue strip instead of a glue tab to eliminate the overlapping "bump" of a glue tab.
    The centering ring template maker is also useful. Cheers.
     
  30. Apr 12, 2019 #270

    Rktman

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    Rub fingers/hands with a light coat of petroleum jelly or, better still, Apogee sells a skin barrier cream: https://bit.ly/2VGfH0S that works even better. This way you still have the sensitivity of using fingers that gloves remove (and the darned CA still stuck to my gloves. Hated having to laboriously pull/sand/scrape little bits of glued on nitrile off of whatever I just CAd :confused: ).
     

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