How to make a slingshot crossbow

Slingshot crossbow

Difficulty: ★★★☆☆

Time: About 4 hours

From scrap: ████████░░ 80%

Preamble

I really don't know how I should call this device, because technically it is a crossbow, but bow replaced by rubber, like a slingshot. And finally it looks like a shotgun and shoot with steel balls. Oo.

Materials

• 5x5 block of wood
  
• Plywood
  
• Spring
  
• Strong rope
  
• Rubber band (catheter)
  
• Durable fabric
  
• Magnet

Tools

• Drill
  
• Jigsaw
  
• Chisel
  
• Cutters
  
• Pliers
  
• Scissors
  
• Fixing Tool
  In general, approximately the home workshop like this
  
  

Body of slingshot crossbow



• Step 1

  
  Body is made of two wooden bars. The design includes handle
  

  



Trigger system



• Step 2

  
  The trigger mechanism is of a slightly modified classic scheme "nut".
  

  

  
  
  Trigger parts are cut of plywood
  

  


• Step 3

  
  In the body make a hole for trigger system
  

  

  
  

  


• Step 4

  
  Assemble a trigger system. Axises are bolts, fix them with glue
  

  


• Step 5

  
  Glue spring to the trigger
  

  


• Step 6

  
  Free end of the spring will fixed in wooden part. Make a hole in it so that the spring will not moved
  

  


• Step 7

  
  Assembled trigger system
  

  



Bowstring



• Step 8

  
  Bowstring is a catheter is purchased at a pharmacy for 150 p. The two tubes are connected in the center with fabric. Fabric forms a loop which will be attached in trigger system (like a bowstring in an ordinary crossbow)
  

  Slingshot crossbow will shoot steel balls (like slingshot, yes), so fix the magnet inside fabric. You can see it at the next photo

  
  

  


• Step 9

  
  Fix rubber to the body by a rope
  

  


• Mistake

  
  The first version of slingshot crossbow was not powerful enough, so it was necessary to extend the body.
  

  Advice: make a long body first, then cut extra after few tests of rubber

  
  

  

  
  

  


• Step 10

  
  The ends of the rubbers bundles are bonded with rope, which is threaded into a hole in the front end of the body.
  

  Also you can see steel ball on magnet

  
  

  


• Step 11

  
  This is how rubber fixed on the trigger system by fabric loop
  

  

  
  

  


• The end

  
  

  

  
  Author: дождь

Video

And such device was proposed by notorious JoergSprave, so that the topic slingshot crossbow remains open and ready for new ideas

Results and tips

• The total length of the body: 56 cm
  
• The tension: 18 kg
  
• Ammunition: 10 mm steel ball
  
• Effective range: 25 m
  
• Power: 10 meters broken / splatter down pine board with thickness of 1.5 cm. Very good for simple crossbow.

Tags: crossbow