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» Hello All!
by JacobL Sun Jul 30, 2017 12:54 pm


    My First "flipper"

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    octavioaugusto.oliveira
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 32
    Join date : 2013-07-15

    My First "flipper"

    Post by octavioaugusto.oliveira on Sat Aug 15, 2015 10:38 am

    Hello Friends


    As a matter of fact I am trying to build a flipper...Why?! First of all I was enthusiasmed with some of them made for members of this forum...


    Just now, it is not finished but I tested and using spring coils, each with a power of 8 Kilos the shoots are amazing in my opinion!



    http://2.bp.blogspot.com/-jcS3ess7diE/Vc9kUNQvVUI/AAAAAAAALcc/k2YEAgSfHW4/s1600/GEDC0735.JPG


    http://1.bp.blogspot.com/-Fk94L8sbllc/Vc9kUR_BMhI/AAAAAAAALcg/c7uLxWulGx8/s1600/GEDC0736.JPG


    Sorry...I post the links of two photos...because I have problems to edit them...


    The "weapon" use a pin trigger...it works very well. It is not fixed yet...



    I would like to know your opinion of my strange carbine...



    Regards

    c sitas
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 438
    Join date : 2012-11-24

    Re: My First "flipper"

    Post by c sitas on Sat Aug 15, 2015 12:27 pm

    Octavioagusto; I built one of the same  flipper. I used divers rubber 5/8" in dia. Mine pulls about 150 plus US pds. I use a red dot sight. Wicked machine . I took some  ideas from Jeep and went on from there.I love working with the ideas from this site. It's a great way for an old man to while away.

    octavioaugusto.oliveira
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 32
    Join date : 2013-07-15

    Flipper again...

    Post by octavioaugusto.oliveira on Sat Aug 15, 2015 12:48 pm

    Yes, I am 78 years old and Jeep has made a very interesting flipper. I saw it here...Nice.
    You see I am working with wood...I am not any conditions at home to work with metal, but no problem. I consult this excellent forum to catch ideas...

    In spite of my 2º cancer I try to be occuped. I made also before conventional homemade crossbows buying the bows...

    Thanks a lot for your answer C sitas

    Octávio Oliveira from Portugal

    c sitas
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 438
    Join date : 2012-11-24

    Re: My First "flipper"

    Post by c sitas on Sat Aug 15, 2015 2:28 pm

    Octavio; I remember you . we talked a while back.  Have fun and enjoy yourself.It's really cool to talk to someone on the other side of the world. This time in life is really something.

    Andy.
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.

    Posts : 61
    Join date : 2014-09-05

    Re: My First "flipper"

    Post by Andy. on Sat Aug 15, 2015 5:38 pm

    Must make one of these one day.
    Looks elegant in its simplicity, and efficient.

    Would love to see a video! Is it noisy?

    rolynd
    Techno Weeny

    Lets put a laser on it!!!


    Techno WeenyLets put a laser on it!!!

    Posts : 56
    Join date : 2011-05-16

    Re: My First "flipper"

    Post by rolynd on Mon Aug 17, 2015 9:00 am

    Nice work!   I think you could draw the arms back even further to use its maximum capability. Greater travel of the swing arms is the advantage the inswinger has over the traditional "outswinger " ballista. At the moment you are wasting a bit of its possibility.

    c sitas
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 438
    Join date : 2012-11-24

    Re: My First "flipper"

    Post by c sitas on Mon Aug 17, 2015 9:16 am

    Good point Roylnd; More could be gained but, the brackets on the stock would need stiffening. Possible a block of wood in front of them. They seem to lean forward. Nice work Octavio.

    octavioaugusto.oliveira
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 32
    Join date : 2013-07-15

    My First "flipper"...Again...

    Post by octavioaugusto.oliveira on Sun Aug 23, 2015 7:57 am

    Hello everybody

    First of all, I appreciate a lot your very good explanations. That's true, I am very grateful...

    A little history concerning this amazing experiment. Two or three year ago, I tried to build a carbine using the simple technology of a slingshot launching flechettes...I build an pretty stock...but the results were very poor...

    http://1.bp.blogspot.com/-c_owbuD15Nc/VdnHMKqC8GI/AAAAAAAALc4/thPESztPQko/s1600/22.JPG

    Then some days before I cut the stock...

    http://1.bp.blogspot.com/-kn4wMTLV5oc/VdnHMelncUI/AAAAAAAALdA/wqoLLc0dpbw/s1600/23.JPG

    And I begin To make a small flipper...it was an experimentation to lauch small darts...

    http://4.bp.blogspot.com/-GFz35PzKnJU/VdnHMoYwLQI/AAAAAAAALc8/_MclbN-h-Gw/s1600/24.JPG

    And it works! Yes I need to make strong with more length of the arms...but I was very anxious to see the results...

    And I follow with my poor project...making a support for give pression to the dart using plastic...

    http://3.bp.blogspot.com/-E2SCi1H8w9k/VdnHNSDP9bI/AAAAAAAALdI/OXC46Wgq96I/s1600/25.JPG

    http://2.bp.blogspot.com/-FMTNaIsqXiY/VdnHN1neNKI/AAAAAAAALdU/1IFL1Z5rc_Q/s1600/26.JPG

    http://1.bp.blogspot.com/-up0V3W5hEVc/VdnHOks5s0I/AAAAAAAALdg/vXBLnSn9HWw/s1600/27.JPG

    http://1.bp.blogspot.com/-7bbf9MtXfTM/VdnHOdF55oI/AAAAAAAALdY/czit0u-JerI/s1600/28.JPG

    The piece is now mounting as the springs...

    http://1.bp.blogspot.com/-Bzhx6Em881k/VdnHO9vvETI/AAAAAAAALdk/yRP5-JDmzGo/s1600/29.JPG

    Not bad as you see (distance, inside at home, about 12 meters...)

    Where the bowstring is retained...a block of pine is very weak too...

    But this weapon is just a prototype...Now I intent to make one new weapon definitevely using metal or wood reforced with allu and with the central ruler longer as the limbs or arms. The piece to retain the bowstring it will be made of allu too, and it is my ideea to lunch arrows...

    No so strong as a carbon bow this mechanism is funny and more easy to control as my tools...

    Have a nice week end!
    And Thanks a lot

    Octávio Oliveira

    c sitas
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 438
    Join date : 2012-11-24

    Re: My First "flipper"

    Post by c sitas on Sun Aug 23, 2015 8:34 am

    Octavio; A very good presentation. I like your results.I, too am a fan of the flipper.

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    Re: My First "flipper"

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