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Thread: 62" Zephyr look-alike build log

  1. #11
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    looking forward to the paper / glue method.

  2. #12
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    Quote Originally Posted by roberto View Post
    looking forward to the paper / glue method.
    Same! This looks awesome, and I would love to keep using EPS instead of EPP. Carbon is bad for RF.
    Don't steal, the government hates competition.

  3. #13
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ID:	3155OK, guys I am swamped with work, and on top of that tomorrow I have to start a new commission for a LAN for a school laboratory. Basically I can only spend like 30 minutes in the evening to work on this thing than it's time to go to sleep.

    The model is almost rady to cover with the brown paper.... so for those who want to see what it's all about.... it's the right time.

    The servos are in (HS-81s), and the 72mhz receiver is also in with the antenna running along the leading edge.

    I CNC cut the main compartment door, out of 2 millimeters coroplast, using 0.8mm bit so the lid closes tightly.
    The paper will cover all of it , for a uniform result (I hope) .
    Well these are the pics.

  4. #14
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ID:	3243Ok, this afternoon I did the paper+white glue and water covering.
    here are some pics, it should be pretty clear.

  5. #15
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  6. #16
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    it takes 24 hours for the glue to dry and the paper to pull hard.

  7. #17
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    Very cool. I just wonder how crash resistant this is. I used a disposable lumber tarp from Home Depot, free from the trash can in the lumber department. It is woven plastic/fiber type stuff which is very strong and lightweight. I used 3M 77 adhesive, but it melts EPS foam, so I had to spray it thick on the tarp and let it get tacky a bit before applying it. I wonder if white glue would bond the tarp stuff any better.
    Don't steal, the government hates competition.

  8. #18
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    You won't believe how crash resistant it is, it's a rc combat proven method through the years, it's not just trying out new stuff that may or may not work.

    On top of this I will cover with Hobby King iron on monokote.
    A lot of its crash resistance comes from the cross-weave fiber tape, the thick brown paper+glue just makes it stiff so it flies very well , as opposed to a flapping epp wing.

    Iron-on covering on top of it makes it more scratch and dent proof.

  9. #19
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ID:	3256Ok, so this morning the wing is dry and I trimmed the excess paper, and cut the slots for the elevons, and for the motor mount.

    the motor mount will be different from the ones seen so far, it is 5mm aircraft grade ply, I designed on the pc and will cut with my cnc router.
    It acts as a small center spar as well as providing motor mount functions.
    Also the ailerons slots will be lined with 4mm balsa that will also act as extra spars, reinforcing the outer sections of the wings.

    Weight so far is 620grams, that includes 2 servos, rc rx, a/v tx, and wires.

    The projected weight for this large wing is 1800-1900 grams (the motor weighs 200gr)
    Not bad for this size wing.

    Note the camera is a sony bullet cam, which is waterproof. It has an o-ring under the front glass piece.
    That should make it more reliable in bad weather and/or landing in wet environments.

    The cam seems to be working very well, better than other sony cameras, as far as auto white balance goes.

  10. #20
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    Looks really good. I will try this method definitely.

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