Crossbows - Everything about Building, Modding, and Using your Crossbow Gear

Latest topics

» Balestra Veloce / Leonardo DaVinci
by msalazar2310 Today at 10:37 am

» Goats Foot Lever
by Geezer Wed Apr 18, 2018 12:42 pm

» Hickory and Ipe 180lb flatbow
by actionbow Mon Apr 16, 2018 1:56 pm

» goat foot questions.
by Geezer Sat Apr 14, 2018 10:26 am

» My latest crossbow
by actionbow Wed Apr 11, 2018 11:10 am

» Prod questions....
by Geezer Mon Apr 09, 2018 10:58 pm

» convert compound cross bow to ball shooter
by kenh Sun Apr 08, 2018 7:34 am

» Skane Lockbow replica (and making of)
by actionbow Wed Apr 04, 2018 11:10 am

» horn inlay and veneer
by Geezer Wed Apr 04, 2018 7:21 am

» String traps bolt to tiller when loosed
by Geezer Tue Mar 27, 2018 9:36 am

» How close to original would you go
by jamesjohnson Thu Mar 22, 2018 4:36 am

» Crossbow bullet bolt's
by Geezer Sun Mar 18, 2018 5:27 pm

» Moving the nut lugs forward.
by Dark Factor Mon Mar 12, 2018 12:33 pm

» Bridle length and waxing?
by Geezer Sun Mar 11, 2018 9:08 pm

» Draw length VS. prod length on wood prods
by Dark Factor Tue Feb 27, 2018 10:32 am

» Typical dimensions of late Gothic composite bows
by Dark Factor Sun Feb 25, 2018 4:10 am

» Medieval stirrup crossbow
by Dark Factor Fri Feb 23, 2018 10:55 am

» Reciprocating Saw?
by stuckinthemud1 Sun Feb 18, 2018 8:59 am

» Help Needed with Bullet Crossbow Prod
by Crossbowmen Sat Feb 17, 2018 2:43 pm

» Leaving the prod strung?
by JacobL Sat Feb 17, 2018 2:37 pm

» Crossbow for a 8 year old kid
by Daniel Levesque Fri Feb 16, 2018 2:11 pm

» Chinese carpenter make bed crossbow, earlest repeating crossbow and chu-ko-nu
by c sitas Thu Feb 15, 2018 8:49 pm

» Linen or Hemp String
by kenh Thu Feb 15, 2018 10:47 am

» New member
by Geezer Sun Feb 11, 2018 7:00 pm

» Why the ratchet in Greek gastraphetes can hold on the string force?
by Dark Factor Wed Feb 07, 2018 12:20 pm


    Hi to all, beginner here with a few questions

    Share

    guest_user
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 2
    Join date : 2013-10-06

    Hi to all, beginner here with a few questions

    Post by guest_user on Sun Oct 06, 2013 5:19 am

    Hi all, I'm just a beginner starting to learn about this so pardon me for my noob questions lol. I'm quite curious about the DIY of modern crossbows and in general how they work especially those reverse draw/limb types from an engineering perspective.

    What tools and materials are actually needed to build one of those?
    E.g. Do I need a CNC milling machine? I've noticed those commercial crossbows that they sell have laminated fibreglass prods and maybe duralumin(Not sure about this though) stock? Are there different grades of fibreglass or duralumin that they use that can be produced by the hobbyist?

    Are there dimensions to the prod or stock that must be followed strictly for optimal performance? How are those calculated?



    avatar
    kenh
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 761
    Join date : 2012-08-03
    Age : 69
    Location : Living Aboard a Sailboat in Fort Myers, FL

    Re: Hi to all, beginner here with a few questions

    Post by kenh on Sun Oct 06, 2013 7:56 am

    There are folks here who have built "reverse action" crossbows literally from garden sticks and string (see the paleo-legal compound bow discussion), from DIY store wooden blocks and lumber, and from the highest of high-tech materials like carbon fiber, cast and machined exotic metals, plastics and a pair of junked snow skis.

    That's the fun of making your own as compared to buying OTC.  The bow in my avatar picture has its prod made from two pieces of fiberglass chainlink fence tension bar, while the Skane or pinlock action is probably a thousand year old design.

    Here are a couple of my favorite discussions to check out:

    http://thearbalistguild.forumotion.com/t689-paleo-legal-compound

    http://thearbalistguild.forumotion.com/t774-compound-project

    guest_user
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 2
    Join date : 2013-10-06

    Re: Hi to all, beginner here with a few questions

    Post by guest_user on Sun Oct 06, 2013 10:18 am

    Do you have links or resources that can teach me how to make laminated fibreglass or work with carbon fibre/dural?

    What about the dimensions of the crossbow? I would expect that there must be some calculations involved in getting the right size of each part.

    Seventeen76
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 28
    Join date : 2013-09-08
    Location : Florida

    Re: Hi to all, beginner here with a few questions

    Post by Seventeen76 on Sun Oct 06, 2013 12:55 pm

    You don't "need" a computer controlled mill, any normal milling task can be done on a normal mill and most parts can be made using some combination of milling, forging, casting, welding, sawing, grinding, stamping, filing etc. Usually there is a "best" way to do something but there is almost never an "only" way so it pays to keep an open mind and design your project around the tools and materials that you actually have available.
    avatar
    kenh
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 761
    Join date : 2012-08-03
    Age : 69
    Location : Living Aboard a Sailboat in Fort Myers, FL

    Re: Hi to all, beginner here with a few questions

    Post by kenh on Sun Oct 06, 2013 2:54 pm

    If you mean "laminated fiberglass" in the sense of a laminated fiberglass recurve bow, there are dozens of resources on the web that can teach you that.  The  'loose laminate' fiberglass that comprises the prod on my avatar crossbow is not glued together, just lightly held together like old fashioned leaf springs. 

    I've never worked with carbon fiber, personally.  Much too expensive for my blood. 

    Dimensions of prods, tillers, bolts, actions depend upon the desired draw weight of the prod you want to build, the materials you want to use, etc.  Give us some specifics and we can probably help.   If you're just starting out, a good resource are the "replacement fiberglass prods" available on Ebay in 50#, 80# and 120-150# draw weights.

    We're not really a "tell me everything I need to know" kind of place.  But we will help you once you've done some research and decided upon the rough dimensions and specifications of your first build.  Read into the discussions here.  Read the Building Wiki referenced on the right side of this page.  Then ask us some pointed questions, not vague generalities, please.

    Sponsored content

    Re: Hi to all, beginner here with a few questions

    Post by Sponsored content


      Current date/time is Fri Apr 20, 2018 9:59 pm