Leonardo's Fighting Vehicle Paper Model

One of the better known inventions of Leonardo da Vinci is his military "fighting vehicle" (aka "turtle tank"). Movement of the vehicle was powered by four men inside operating hand cranks. The idea was to move into the midst of a company of enemy soldiers and then open fire with the cannons mounted around the sides. This paper model of the fighting vehicle may be downloaded at the Russian "Museum on a Desk" web page located here (the two page template is at the bottom). The style of the template reminds me a lot of the templates that used to be published in the Czech children's magazine, ABC.

Other Leonardo Papercraft:

Ornithopter 
Simplified Fighting Vehicle
BBC Models
Cam Hammer Machine

UPDATE 10/15/19: Below is a build photo of the finished model!

Da Vinci Cam Hammer Paper Model

I have always enjoyed functioning models of Leonardo da Vinci inventions. Pictured is a papercraft version of da Vinci's "cam hammer", a labor saving machine for hammering metal. Steam powered machines like this were used hundreds of years after Leonardo's death during the Industrial Revolution. This paper model is the work of my papercrafter friend Giuseppe Civitarese and may be downloaded for free at his website, Paper Pino.

Other da Vinci Papercraft:

Ornithopter (flying machine)
Turtle Tank
BBC Leonardo Foldees

Leonardo Papercraft Vehicles

The BBC's children's television series Leonardo features an imaginative story line that follows the adventures of a teenage Leonardo DaVinci. The kid's activity page for the series features four free paper models of Leonardo's inventions. Included in the set are a tank, a bicycle, a glider and a submarine.  The templates for the papercraft vehicles may be downloaded here.

Da Vinci Tank Paper Model

From RocketmanTan, the creator of this da Vinci tank papercraft:

"...da Vinci was a great inventor, drawing up plans for contraptions hundreds of years ahead of his time. One of these inventions was his moving gun platform (affectionately called the Turtle). This was the closest to a modern day tank that humans would contrive of for four hundred years."

A download of the template for the tank is available here.

Pop Culture Paper Toy Tubes

Designer and animator Eduardo Souzacampus has created a delightful series of simple paper toys which he calls "Tubeland". Each of the toys is assembled by rolling a single piece of paper into a tube, then gluing it in place. Pictured above are the paper toys representing Darth Vader, Carmen Miranda, and Nintendo's Mario. A wide range of pop culture characters are available including historical figures (Da Vinci, Mozart, etc), cartoon characters (Betty Boop, Flintstones, etc), and soccer players (Pele, Ronaldo Fenomeno). One of my personal favs is the Heath Ledger Joker paper toy. All 24 of the Tubeland paper toys may be downloaded here.

Da Vinci Papercraft: Ornithopter

Among Leonardo da Vinci's numerous designs are plans for an ornithopter. An ornithopter is a machine that flys by imitating the flapping motion that birds use. Some examples of fictional ornithopters seen in movies are the aircraft that the Wookies use in Star Wars: Revenge of the Sith and also the "flapters" in Studio Ghibli's Castle in the Sky. This paper model of Da Vinci's invention is offered by Czech Radio Leonardo here.