Introduction: Knex Arrow Slingshot
This is a really easy slingshot made with Knex and will only take you about 5 mins to create.
Add a Teacher Note to share how you incorporated it into your lesson.
Step 1: Materials
6 x 19cm rods
2 x 13cm rods
2 x 8.5cm rods
2 x 5.5cm rods
2 x 3cm rods
4 x 1.5cm rods
6 x 2-slot connectors
12 x 'V'connectors
4 x 4-slot connectors
2 x 3-slot connectors
2 x rubberbands (medium and large)
Step 2: Begin to Create Barrel
Align two long grey rods
Step 3: Finish Barrel
Slide on 10 V conectors onto the long grey rods about 1cm from the end.
Step 4: Start of Frame
Click on a 3 slot connector on each rod, as shown in red
Step 5: Supports
In this step you are creating the two supports.
Step 6: Joining the Supports to the Barrell
Take the barrell and join the red '3' slot connectors to the larger support. Join the smaller support to the barrell's 2 long grey rods.
Step 7: Adding the Rubber Band
Loop a long rubberband around the front of the slingshot as shown.
Step 8: Rubber Band Bow
Take a second rubber band and loop it over the front of the barrel to behind the row of 'V' connectors on the barrel. The rubber band should cover the hole at the back of the barrel.
Step 9: Making the Arrows
The arrows are easy!! Join a long grey rod to an orange 2-slot connector and then join a tiny rod.
Step 10: Loading the Sling Shot
Thread the arrow down the barrel of the sling shot. Be sure that the arrow collects the rubberband and stretches with the arrow. To fire, hold the arrow with the rubber band at full stretch and let go. DO NOT POINT THE ARROW AT PEOPLE...IT WILL HURT!!!
Step 11: Demonstration on How to Fire
This short vidoe will show you how to load the arrow and how fast they fire!