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Thread: Balsa Bashing a CAC Boomerang.

  1. #1
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    Lightbulb Balsa Bashing a CAC Boomerang.

    This is a subject I have been working on for months now and I'm determined to make a start on this. My goals are to
    produce a scale-ish model of the CA 13 Boomerang around 1/7 scale with working flaps/retracts I also want a 3 blade prop.





    Power: Lipo/esc/motor combo is unknown at this stage(I want to swing a scale 3-blade prop).
    Retracts: I intend to use Eflite electric 60-120 size 90 degree units.
    Servos: All standard size, ailerons will be slim wing servos using a rotary drive system.
    Construction: Balsa and ply, built up cowl.


    I have designed a rudimentary model in Google SketchUp, the fuselage, horizontal and vertical stabilizers are able to be built but I still need to iron out a few issues concerning the wing.

    Click image for larger version. 

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    This is where I'm at as of right now, the fin and horizontal stab are almost complete. I will begin work on the
    rudder and elevators next:



    Last edited by kev.au; 22nd May 2017 at 07:35 AM.
    [B][SIZE=1][FONT=Verdana]Håvard Støre [/FONT][/SIZE][/B]: [SIZE=2][COLOR=#333333][FONT=Verdana]Sir I humbly bow down to your balsa bashing abilities!![/FONT][/COLOR]:)[COLOR=#333333][FONT=Verdana].[/FONT][/COLOR][/SIZE]
    [SIZE=1][B]chicken sashimi [/B][/SIZE]: [FONT=verdana][SIZE=2]my T-Shirts are all 100% guaranteed to get you laid.[/SIZE][/FONT]
    [SIZE=1][B]Roberto [/B][/SIZE]: [FONT=verdana][SIZE=2]you're a legend Kev. [/SIZE][/FONT]
    [SIZE=1][B]ssassen [/B][/SIZE]: [FONT=verdana][SIZE=2]I bow humbly before kev.au's greatness.[/SIZE][/FONT]
    [B][SIZE=1]Danub [/SIZE][/B]:[SIZE=1] [FONT=verdana][SIZE=2]Sir I humbly bow down to your tree bashing abilities!!.[/SIZE][/FONT][/SIZE]
    [B][SIZE=1]MonZon [/SIZE][/B]: [FONT=verdana][SIZE=2]Damn, Kev you are gooooood!.[/SIZE][/FONT]
    [B][SIZE=1]R. Montiel[/SIZE][/B] : [FONT=verdana][SIZE=2]For sure the limiting factor is the earth curvature[/SIZE][/FONT]

  2. #2
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    Skinned the top and bottom of the horizontal stab with 1.5mm balsa plus added the leading edge.



    [B][SIZE=1][FONT=Verdana]Håvard Støre [/FONT][/SIZE][/B]: [SIZE=2][COLOR=#333333][FONT=Verdana]Sir I humbly bow down to your balsa bashing abilities!![/FONT][/COLOR]:)[COLOR=#333333][FONT=Verdana].[/FONT][/COLOR][/SIZE]
    [SIZE=1][B]chicken sashimi [/B][/SIZE]: [FONT=verdana][SIZE=2]my T-Shirts are all 100% guaranteed to get you laid.[/SIZE][/FONT]
    [SIZE=1][B]Roberto [/B][/SIZE]: [FONT=verdana][SIZE=2]you're a legend Kev. [/SIZE][/FONT]
    [SIZE=1][B]ssassen [/B][/SIZE]: [FONT=verdana][SIZE=2]I bow humbly before kev.au's greatness.[/SIZE][/FONT]
    [B][SIZE=1]Danub [/SIZE][/B]:[SIZE=1] [FONT=verdana][SIZE=2]Sir I humbly bow down to your tree bashing abilities!!.[/SIZE][/FONT][/SIZE]
    [B][SIZE=1]MonZon [/SIZE][/B]: [FONT=verdana][SIZE=2]Damn, Kev you are gooooood!.[/SIZE][/FONT]
    [B][SIZE=1]R. Montiel[/SIZE][/B] : [FONT=verdana][SIZE=2]For sure the limiting factor is the earth curvature[/SIZE][/FONT]

  3. #3
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    Subscribed. Looking good Kev:-) I am excited

  4. #4
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    Quote Originally Posted by Håvard Støre View Post
    Subscribed. Looking good Kev:-) I am excited
    I'm excited too!, this might be the first project I actually finish .
    Last edited by kev.au; 26th September 2017 at 02:22 AM.
    [B][SIZE=1][FONT=Verdana]Håvard Støre [/FONT][/SIZE][/B]: [SIZE=2][COLOR=#333333][FONT=Verdana]Sir I humbly bow down to your balsa bashing abilities!![/FONT][/COLOR]:)[COLOR=#333333][FONT=Verdana].[/FONT][/COLOR][/SIZE]
    [SIZE=1][B]chicken sashimi [/B][/SIZE]: [FONT=verdana][SIZE=2]my T-Shirts are all 100% guaranteed to get you laid.[/SIZE][/FONT]
    [SIZE=1][B]Roberto [/B][/SIZE]: [FONT=verdana][SIZE=2]you're a legend Kev. [/SIZE][/FONT]
    [SIZE=1][B]ssassen [/B][/SIZE]: [FONT=verdana][SIZE=2]I bow humbly before kev.au's greatness.[/SIZE][/FONT]
    [B][SIZE=1]Danub [/SIZE][/B]:[SIZE=1] [FONT=verdana][SIZE=2]Sir I humbly bow down to your tree bashing abilities!!.[/SIZE][/FONT][/SIZE]
    [B][SIZE=1]MonZon [/SIZE][/B]: [FONT=verdana][SIZE=2]Damn, Kev you are gooooood!.[/SIZE][/FONT]
    [B][SIZE=1]R. Montiel[/SIZE][/B] : [FONT=verdana][SIZE=2]For sure the limiting factor is the earth curvature[/SIZE][/FONT]

  5. #5
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    Got started on the elevator, was more time consuming than I had anticipated.... I still need to shape the inner
    balsa block and add some lightening holes.


    [B][SIZE=1][FONT=Verdana]Håvard Støre [/FONT][/SIZE][/B]: [SIZE=2][COLOR=#333333][FONT=Verdana]Sir I humbly bow down to your balsa bashing abilities!![/FONT][/COLOR]:)[COLOR=#333333][FONT=Verdana].[/FONT][/COLOR][/SIZE]
    [SIZE=1][B]chicken sashimi [/B][/SIZE]: [FONT=verdana][SIZE=2]my T-Shirts are all 100% guaranteed to get you laid.[/SIZE][/FONT]
    [SIZE=1][B]Roberto [/B][/SIZE]: [FONT=verdana][SIZE=2]you're a legend Kev. [/SIZE][/FONT]
    [SIZE=1][B]ssassen [/B][/SIZE]: [FONT=verdana][SIZE=2]I bow humbly before kev.au's greatness.[/SIZE][/FONT]
    [B][SIZE=1]Danub [/SIZE][/B]:[SIZE=1] [FONT=verdana][SIZE=2]Sir I humbly bow down to your tree bashing abilities!!.[/SIZE][/FONT][/SIZE]
    [B][SIZE=1]MonZon [/SIZE][/B]: [FONT=verdana][SIZE=2]Damn, Kev you are gooooood!.[/SIZE][/FONT]
    [B][SIZE=1]R. Montiel[/SIZE][/B] : [FONT=verdana][SIZE=2]For sure the limiting factor is the earth curvature[/SIZE][/FONT]

  6. #6
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    More work on the elevator:



    This is where I'm at with the wing, still need to figure a few small things out.

    [B][SIZE=1][FONT=Verdana]Håvard Støre [/FONT][/SIZE][/B]: [SIZE=2][COLOR=#333333][FONT=Verdana]Sir I humbly bow down to your balsa bashing abilities!![/FONT][/COLOR]:)[COLOR=#333333][FONT=Verdana].[/FONT][/COLOR][/SIZE]
    [SIZE=1][B]chicken sashimi [/B][/SIZE]: [FONT=verdana][SIZE=2]my T-Shirts are all 100% guaranteed to get you laid.[/SIZE][/FONT]
    [SIZE=1][B]Roberto [/B][/SIZE]: [FONT=verdana][SIZE=2]you're a legend Kev. [/SIZE][/FONT]
    [SIZE=1][B]ssassen [/B][/SIZE]: [FONT=verdana][SIZE=2]I bow humbly before kev.au's greatness.[/SIZE][/FONT]
    [B][SIZE=1]Danub [/SIZE][/B]:[SIZE=1] [FONT=verdana][SIZE=2]Sir I humbly bow down to your tree bashing abilities!!.[/SIZE][/FONT][/SIZE]
    [B][SIZE=1]MonZon [/SIZE][/B]: [FONT=verdana][SIZE=2]Damn, Kev you are gooooood!.[/SIZE][/FONT]
    [B][SIZE=1]R. Montiel[/SIZE][/B] : [FONT=verdana][SIZE=2]For sure the limiting factor is the earth curvature[/SIZE][/FONT]

  7. #7
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    I recently purchased a 50w ebay laser cutter so i've been learning how
    to operate that plus learning the software etc.. It's been fun and I have made some progress:


    80% of the fuselage formers have been cut plus a few wing components.


    [B][SIZE=1][FONT=Verdana]Håvard Støre [/FONT][/SIZE][/B]: [SIZE=2][COLOR=#333333][FONT=Verdana]Sir I humbly bow down to your balsa bashing abilities!![/FONT][/COLOR]:)[COLOR=#333333][FONT=Verdana].[/FONT][/COLOR][/SIZE]
    [SIZE=1][B]chicken sashimi [/B][/SIZE]: [FONT=verdana][SIZE=2]my T-Shirts are all 100% guaranteed to get you laid.[/SIZE][/FONT]
    [SIZE=1][B]Roberto [/B][/SIZE]: [FONT=verdana][SIZE=2]you're a legend Kev. [/SIZE][/FONT]
    [SIZE=1][B]ssassen [/B][/SIZE]: [FONT=verdana][SIZE=2]I bow humbly before kev.au's greatness.[/SIZE][/FONT]
    [B][SIZE=1]Danub [/SIZE][/B]:[SIZE=1] [FONT=verdana][SIZE=2]Sir I humbly bow down to your tree bashing abilities!!.[/SIZE][/FONT][/SIZE]
    [B][SIZE=1]MonZon [/SIZE][/B]: [FONT=verdana][SIZE=2]Damn, Kev you are gooooood!.[/SIZE][/FONT]
    [B][SIZE=1]R. Montiel[/SIZE][/B] : [FONT=verdana][SIZE=2]For sure the limiting factor is the earth curvature[/SIZE][/FONT]

  8. #8
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    Plus I now have retracts.

    [B][SIZE=1][FONT=Verdana]Håvard Støre [/FONT][/SIZE][/B]: [SIZE=2][COLOR=#333333][FONT=Verdana]Sir I humbly bow down to your balsa bashing abilities!![/FONT][/COLOR]:)[COLOR=#333333][FONT=Verdana].[/FONT][/COLOR][/SIZE]
    [SIZE=1][B]chicken sashimi [/B][/SIZE]: [FONT=verdana][SIZE=2]my T-Shirts are all 100% guaranteed to get you laid.[/SIZE][/FONT]
    [SIZE=1][B]Roberto [/B][/SIZE]: [FONT=verdana][SIZE=2]you're a legend Kev. [/SIZE][/FONT]
    [SIZE=1][B]ssassen [/B][/SIZE]: [FONT=verdana][SIZE=2]I bow humbly before kev.au's greatness.[/SIZE][/FONT]
    [B][SIZE=1]Danub [/SIZE][/B]:[SIZE=1] [FONT=verdana][SIZE=2]Sir I humbly bow down to your tree bashing abilities!!.[/SIZE][/FONT][/SIZE]
    [B][SIZE=1]MonZon [/SIZE][/B]: [FONT=verdana][SIZE=2]Damn, Kev you are gooooood!.[/SIZE][/FONT]
    [B][SIZE=1]R. Montiel[/SIZE][/B] : [FONT=verdana][SIZE=2]For sure the limiting factor is the earth curvature[/SIZE][/FONT]

  9. #9
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    I managed to cut all of the ribs for the outer left wing panel. The 2x dihedral braces and the first 3 inner ribs that connect to them are
    all 3mm ply, the rest of the ribs are 3mm balsa.





    Last edited by kev.au; 19th July 2017 at 09:04 PM.
    [B][SIZE=1][FONT=Verdana]Håvard Støre [/FONT][/SIZE][/B]: [SIZE=2][COLOR=#333333][FONT=Verdana]Sir I humbly bow down to your balsa bashing abilities!![/FONT][/COLOR]:)[COLOR=#333333][FONT=Verdana].[/FONT][/COLOR][/SIZE]
    [SIZE=1][B]chicken sashimi [/B][/SIZE]: [FONT=verdana][SIZE=2]my T-Shirts are all 100% guaranteed to get you laid.[/SIZE][/FONT]
    [SIZE=1][B]Roberto [/B][/SIZE]: [FONT=verdana][SIZE=2]you're a legend Kev. [/SIZE][/FONT]
    [SIZE=1][B]ssassen [/B][/SIZE]: [FONT=verdana][SIZE=2]I bow humbly before kev.au's greatness.[/SIZE][/FONT]
    [B][SIZE=1]Danub [/SIZE][/B]:[SIZE=1] [FONT=verdana][SIZE=2]Sir I humbly bow down to your tree bashing abilities!!.[/SIZE][/FONT][/SIZE]
    [B][SIZE=1]MonZon [/SIZE][/B]: [FONT=verdana][SIZE=2]Damn, Kev you are gooooood!.[/SIZE][/FONT]
    [B][SIZE=1]R. Montiel[/SIZE][/B] : [FONT=verdana][SIZE=2]For sure the limiting factor is the earth curvature[/SIZE][/FONT]

  10. #10
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    Wow! Such nice work:-) Do you have a link to the laser cutter?

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