![Image](https://i.imgur.com/0aAXn4Hl.png)
I don't have any plans, just printed this and used it for inspiration.
Cut up the main parts using Ash and started the glue up. This was just a lot of cutting and milling of stock. Before I could start I had to decide that the catapults should be 30cm long and 15cm wide and the profile of the wood parts should be 20x25mm, then I could start making parts.
![Image](https://i.imgur.com/53p6LNah.jpg)
I sold my wood lathe this summer so I used the metal lathe to cut the cylinders, with some preparation to get as much dust as I could, wood dust is not nice to the machines.
![Image](https://i.imgur.com/Mto2He0h.jpg)
![Image](https://i.imgur.com/mLdEcV2l.jpg)
I made the ratchet wheels in Solidworks and printed out two templates which I cut on the bandsaw.
![Image](https://i.imgur.com/dEfGW1Plh.jpg)
Then I used the mill to cut the slots that will hold the wooden leaf springs.
![Image](https://i.imgur.com/6hWc23jh.jpg)
![Image](https://i.imgur.com/sET1b7Dh.jpg)
![Image](https://i.imgur.com/AEnz6Yph.jpg)
Then I had to make some dowels, so I used a tip from Mattias Wandel and made a dowel jig. Worked real well, have idea for making one in metal now for different sizes.
![Image](https://i.imgur.com/5fCy7yH.jpg)
![Image](https://i.imgur.com/6WxYOzw.jpg)
![Image](https://i.imgur.com/IXLKGJn.jpg)
![Image](https://i.imgur.com/IT68yqx.jpg)
Also worked on the trigger mechanism, the original one in the 1st pic wasn't very good. I instead made a wooden, spring loaded sear that you use a lever to release:
![Image](https://i.imgur.com/4bueND7.jpg)
The "spoon" came out nice I thought. I used a wood router bit to make the gouge in the mill, I modified it and cut off the bearing that was used to follow along edges. It was broken anyway, a cheap 1/2" router bit set from ebay. I needed a pilot hole though so I used a normal 12mm router to make that, then I plunged the router bit on the mill and moved it a little along the X-axis to make an oval indentation.
![Image](https://i.imgur.com/LaZktbTl.jpg)
Almost finished now.
![Image](https://i.imgur.com/x6gRwZml.jpg)