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STORE YOUR TENSION!! GET READY TO LAUNCH!! How far can you launch an object? Store energy into the Lever by changing the tension of the rubber bands. Program the motor to release the weight of the Lever.
Catapult
Cam Cam Beige Pin/Axle
Beige Pin/Axle
#8 Axle
Step 1You will Need:
8#
Green 2x4Plate
Red 1x16with Holes
Red 1x16with Holes
Step 2You will Need:
Choose the correct ho le .
White 2x6 Plate
White 2x6 Plate
White 2x6 Plate
Green2x4 Plate
Step 3You will Need:
Step 4You will Need:
Green Flat Tile Green Flat TileYellow 1x6Brick
Yellow 1x6Brick
Yellow 1x4Brick
Yellow 1x4Brick
Step 5
Attach the assembly !
White 1x8Plate
White 1x8Plate
Grey 8x16 Brick
Step 6You will Need:
Red 2x6 Brick
Red 2x6 Brick
Red 1x4Brick
Red 1x4Brick
Step 7You will Need:
Red 1x6with Holes
Red 1x6with Holes
Red 1x2with Hole
Red 1x2with Hole
Step 8You will Need:
Bushing Bushing #6 Axle
Step 9You will Need:
6#
Choose the correct ho le ! !
Red 2x2 Brick
Red 2x2 Brick
Red 2x2Wedge
Red 2x2Wedge
Red 1x2with Holes
Red 1x2with Holes
Red 1x2with Holes
Red 1x2with Holes
Step 10You will Need:
Bushing Bushing Beige Pin/Axle
Beige Pin/Axle
Step 11You will Need:
Yellow 2x2Brick
Yellow 2x2Brick
Red 2x4Brick
Red 2x4Brick
Step 12You will Need:
Yellow 2x4Brick
Yellow 2x4Brick
Yellow 1x2Brick
Yellow 1x2Brick
Step 13You will Need:
Hub
Step 14You will Need:
White 1x8Plate
White 2x8Plate
White 2x8Plate
Step 15You will Need:
Trap the cord .
Yellow 2x6Brick
White 2x8 Plate
Step 16You will Need:
Motor
Step 17You will Need:
White 2x8 Plate
Plug the Motor into the Hub.
Cam Bushing #3 Axle
Step 18You will Need:
Rubber Band Rubber Band
Step 19You will Need:
Step 20
Use the Cam to ho ld the Lever down.
Your Catapult is Built!...Time to Program it!
Load up your Catapult , secure the Lever w ith the Cam, and get ready to launch!
Programming
Start StartTurn Motor This Way
Turn Motor That Way
Motor on for 1 Motor on for 1 Noise #5
Th is program moves the Cam and re leases the Lever of the Catapult . Pu l l the Catapult back down and re load!
Launch! Reload!
1 . M in imize these instruct ions and open the LEGO® WeDo® software.2 . Program your robot with the program above.3 . If you f in ish , open the instruct ions and cont inue to the extens ion act iv it ies !
Extension 1Change the pos it ion of the rubber bands by mov ing the pegs up.
What happens to the Force generated? When is there more? When is there less?
Extension 2Combine the two programs and use the Display Tab to disp lay
launch ing messages!
Start on Key
Display“Fire”
Motor This Way
Motor That Way
Motor on for 1
Motor on for 1
Display Background
Sound Wait for16 seconds
Display“Re-Load”
DisplayBackground
Extension 3Try to h it a target! Set up 2 targets at different distances
(keep one c loser than the other) . Adjust e ither the load or the force in order to h it each one as accurately as poss ib le .
