Step 1: Making the Base
After this in the middle of the pipe add ether wood or iron bars to make a trapezoid with the pipe. On the top of this add a flat bar with a hole in the top (for the wings) and on the top left and bottom right add a wood block that will make the wings rest level. In the middle of the trapezoid add a pulley on each side.
Step 2: The Wings
The wing's backbone consist of three different parts, the first extends past the mount on the base a little bit (refer to picture). The second fits into the first and has the first wing. Between the two is a trampoline spring and the third is just long enough to hold the second wing. The wings mount on opposite ends of the base mount.
The wings are dowles cut at different lengths to look like a bird wing with an old sheet attached to the top with string.
Near the begining of the second wing backbone segment attach a rod with a spring on the bottom then attach the spring to the base pipe. After this attach a ring to the bottom of the second segment of the wing backbone (for the rope).
For this I used a hack saw but a Craftsman Cut Off Saw would sure make this faster.
Step 3: The Peddles
Second the peddles are just two planks of wood one with a hole in each of the corners and one with a hole in the middle on each side.
Step 4: The Ropes
The paddle with one hole goes on the bottom. Attach the rope through teh hole in the paddle with a knot, the rope then goes through the hole in the bottom corner of the ring board this rope then goes to pulley 1 and attaches to the end of wing backbone one that extends opposite of the rest of the wing.
The second peddle goes on top. Put a rope through the hole on the bottom corner then go through the hole in the middle of the ring board and attach to the rod you put in the second wing backbone righ were the rod and spring attach at the bottom this will make it so that as the wing comes down they will turn slightly.
Now attach a rope to the hole in the top corner of the peddle don't put this through a hole in the ring board but take it strait to the number 2 pulley then through the ring on the second wing segment and fimaly attach it to the end of the third wing segment.
Step 5: Extra Information
If you have trouble or don't get any thing ask me and I will try to get back to you asap.