In this challenge, you will have to build one of leonardo da vincis inventions(You can also take the ones he has drawn but never build). For those who dont already know: Dont worry, there are lots of them(type in google images: "leonardo da vinci inventions"). 
Prices: 
1. = 10 upvotes 
2. =5 upvotes 
3. = 3 upvotes 
(If im going to be really impressed by one of you, I will give him 25 upvotes) 
You have time until March. Show me your skills!
        
          
              
                  
                  
                
@Noman0rumeral @Overland
Thanks (-:
https://www.simpleplanes.com/a/pdWEtN/Da-Vinci-Helical-Air-Screw
Ill think about it