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DIY foldable crossbow


31-07-2015, 21:18. Author: AlexGyver

Part 1. DIY crossbow


  • Old crossbow

    First I built an ordinary crossbow with pulley system. Bow made of car's spring, fastened with metal plate and steel corners. Bowstring is made of steel cord. Body of a crossbow I made of fiberglass and aluminium.
    DIY foldable crossbow

    DIY foldable crossbow

  • Pulleys

    Are made on lathe
    DIY foldable crossbow

    DIY foldable crossbow

    DIY foldable crossbow

  • Bolts

    Bolts consisted two parts: shaft is made of stick of crib's back with stud inside it. Second is made of antenna's tube with pressed nut.
    I achieve the bolt with easily exchangeable tips and balance

    DIY foldable crossbow

    DIY foldable crossbow

  • Tail

    3 tails are made of thick paper and fastened with thread and glue
    DIY foldable crossbow

  • Result

    Tension is about 50 kg. Straight part of flight path is about 40 meters.
    Crossbow was very nice, but I decided to make another one, with foldable design

  • Часть вторая


  • Step 1

    It will base on my first crossbow. I treat car's spring to triangle shape. Wide edge to attach to body and narrow for pulleys

  • Step 2

    Body of a crossbow is a two connected plywood layers. Gap between them serves as groove for bolt.

  • Step 3

    Each half of bow is attached with steel plates and fastened to body on hinges.
    DIY foldable crossbow

    DIY foldable crossbow

  • Step 4

    Hinge is a piece of steel rectangle profile, axis of rotation is a steel tube.
    DIY foldable crossbow

    DIY foldable crossbow

    DIY foldable crossbow

    DIY foldable crossbow

    DIY foldable crossbow

  • Step 5

    Also for improving mobility I decided to make foldable buttstock. It would work like this
    DIY foldable crossbow

    DIY foldable crossbow

  • Step 6

    Trigger system cut of 4 mm steel sheet
    DIY foldable crossbow

  • Step 7

    Crossbow's body with mount for buttstock. It is all made of steel plate and fastened with bolts and nuts.
    DIY foldable crossbow

    DIY foldable crossbow

    Assembled crossbow
    DIY foldable crossbow

    DIY foldable crossbow

    Folded
    DIY foldable crossbow

    DIY foldable crossbow

  • Step 8

    Clamp for bolts I made of steel
    DIY foldable crossbow

  • Buttstock

    Here you can see buttstock in two positions
    DIY foldable crossbow

    DIY foldable crossbow

  • Step 9

    I add a handle to nut to ease a process of folding bow
    DIY foldable crossbow

  • Final photoset

    DIY foldable crossbow

    DIY foldable crossbow

    DIY foldable crossbow

    DIY foldable crossbow


    Near my first diy crossbow
    DIY foldable crossbow

    Author: deminpetr74

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