Instructables
Picture of Autogyro Kite - Hafner Rotabuggy
CAM00332.jpg
CAM00343.jpg
CAM00345.jpg
This model works on the same principle as the real Hafner Rotabuggy from WWII, being tethered and pulled through the air to spin the blades and create an air-catching disk which then lifts the craft into the air. Craft like the Rotabuggy, Focke Achgelis Fa330  and many others would have been towed by a truck or a U-Boat to give it speed and lift, but the model I will teach you how to build will work like a traditional kite powered by the wind.

To build this model you will need;

Scissors
A pin
Tape
String (use any string that you would associate with kite flying. I recommend thin nylon string.)
Wire and Pliers
Prestik/Blue Tac/Putty/Small coin} to use as ballast
Something to wind the string around
A windy place to fly it in
Beads
Packing/Floor insulation/other lightweight foam sheets (I used the kind used for protecting eggs when you buy a tray of 30.)
 
Remove these adsRemove these ads by Signing Up

Step 1: Making the Rotors

Picture of Making the Rotors
CAM00333.jpg
CAM00334.jpg
CAM00339.jpg
CAM00340.jpg
First, cut a blade out of the foam sheet. Then trace it and make 2 others like it. To make the centre that holds them together, cut out an equilateral triangle with each side the same length as the width of a blade. Tape the blades to it as shown. Then poke a hole in the centre for the rotor shaft to fit through.

Cut 2 small circles out of the foam. These will help reduce friction.  Make a small hole in the centre of each one. Then place all the parts mentioned (and 2 beads) onto the pin to create the rotor hub. The order should be like this:  0-o-O-X-O-o----------------
If 0=pin head, o=bead, -=pin shaft, X=rotor centre.

Also cut out a shape like the one shown in the 2nd last picture. This is what the shaft will be connected to the fuselage with.
awesomecreations (author) 1 year ago
Some modifications made after I published this instructable:

-Thin wire along the leading edge of each blade for better stiffness and strength + also to help the blades keep momentum when there is a short break in the wind.
-More ballast to counter the heavier blades (or it flips upside-down)
-2 extra beads on the shaft to further reduce friction
-Poked the tip of the pin out the side of the holder and bent it 90 degrees to prevent it from pulling out and releasing the rotors.
-bent the shaft slightly forward to prevent tail strikes by the blades.
That's pretty cool :) You should enter this into the Holiday Gifts Contest!
Thanks, I have.
awesomecreations (author) 1 year ago
I have published another more in depth autogyro Instructable and here is the link:

http://www.instructables.com/id/Simple-model-De-La-Cierva-Autogyro/
Kiteman1 year ago
Do the blades have any sort of aerofoil cross-section or twist to provide lift?
awesomecreations (author)  Kiteman1 year ago
Yes. An autogyro works by remaining in a state of constant autorotation by the blades basically having a negative angle of attack of about 3 degrees or so. A bigger angle will reduce lift and allow it to spin and accelerate faster while closer to neutral will give more lift and a lower rpm number. You could just bend the blades depending on the wind conditions for better flying results.
These are great. I am going to try make one.