This is an easy to build crossbow expansion set.
This crossbow is made to use it in your hand or to attached it to your fire machine
You can also use your imagination to build your remixed version.
The new pieces allows you to make with the crossbow a very long shoots.
One thing that I didn't made is to create the crossbow machine box with some cartoons.
I think that is better if you create your crossbow box by you own, in this way you will have fun and you will increase your imagination.
Obviously you can also combine the prices in different way to create very interesting design, the only limit is only your imagination!

I want to apologize if same pieces which you see in the picture are not as the pieces .stl you can download because I have printed tham before realizing that the contest doesn't allows me to do so big pieces.
Anyway I have uploaded some pictures that show you how to obtain tham.
And i want also to apologize if in the picture you see too long rod, but i have finished the pla to print them, so i had to make them in wood.
All pieces of my design can enter in an area of 10x10x12.5cm

PIECES THAT YOU NEED:

(downloadable from the sets of official thikfun )

5.5” Rod (2 piece)
7” Rods (2 pieces)
2” Rod (2 pieces)
1.5” Rod (7 pieces)
Large Connector ThinkFun Maker Studio (4 pieces)
Extra Long Connector Plate (2 pieces)
Hub caps (26 pieces)
Hole Punch (1 pieces)

(pieces invented by me)

C (2 pieces)
D (gomma ruota v1) (4 pieces) or D (ruote v2) (4 pieces)
F (cerchione) (4 pieces)
Elastic rubber(2 pieces)
Cc(1 pieces)
Y(1 pieces)
J(1 pieces)
X(1 pieces)

I build my own printer, is similar to the prusa i3

Doesn't Matter

No

0.26

60%

You have to use support only with " F cerchine"

You have to take the file.stl "F (cerchione)" and the file "D (gomma ruota v1)" and to assemble them as the picture shows

You have to take one nine hole piece "Large_Connector_ThinkFun_Maker_Studio" and to joint it with the "C" Piece as the picture shows . In this way you have assemble one part of crossbown skeleton . (You have to do it again two times) (to attached it to the c piece use aslo four Hub Caps)

Now you have to take two 12 hole pieces "Extra Long Connector Plate " and the new piece "X" now you have to attach the two "Extra Long Connector Plate With the "X" piece with four stick (rod) in total (to not let them to rotate) and with eight Hub caps to block them

Now you have to take two the "J " piece and place it in the "Y" piece as the picture shows
Now you have to attach it with the pieces previously assembled with two stick (rod) in total (to not let them to turn) and with four Hub caps to block them.
After you have to take your elastic rubber and connect to ' end ( if you want to get a shot more powerful ) of the two pieces called "Extra Long Connector Plate " or if you want you cane place some one rod for each "Extra Long Connector Plate " and attached to them the rubber ends.
Then take anoter cable or elastic rubber and drive it into the hole on the piece "J" to pull the crossbow.

Now you have to take the "Cc " piece and the "2" piece as the picture shows and attached them to the pieces previously assembled as the picture shows and to blok them with some Hub caps where tey are needed.

Now you have just to attached with some stiks (rods) and some Hub caps the crossbow previously assembled to the crossbow frame through two pieces with 9 holes "Long Connector Plate " ,two rodas and 8 Hub caps to block and keep everything in place as the picture showd. Now your crossbow fire machin is ready!!!

You have to take two 12 hole pieces "Extra Long Connector Plate " and the new piece "X" now you have to attach the two "Extra Long Connector Plate With the "X" piece with four stick (rod) in total (to not let them to rotate) and with eight Hub caps to block them

Now you have to take two the "J " piece and place it in the "Y" piece as the picture shows
Now you have to attach it with the pieces previously assembled with two stick (rod) in total (to not let them to turn) and with four Hub caps to block them
After you have to take your elastic rubber and connect to ' end ( if you want to get a shot more powerful ) of the two pieces called "Extra Long Connector Plate " or if you want you cane place some one rod for each "Extra Long Connector Plate " and attached to them the rubber ends.
Then take anoter cable or elastic rubber and drive it into the hole on the piece "J" to pull the crossbow and now your crossbow fire machin is ready!!!

You have to set the rubber in tensoion by stretching it. Now you arm the catapult and the last thing you have to do is to release the elastic rubber and... Shot!!!