A stable and fast paper airplane, the Twin Shark is a development on a previous design, the Shark. All credit goes to lieuwe for the original design, this is a development.
TAA USAF Designation: A4-2
Step 1: Materials
1 Piece of 8.5 by 11 inch paper
Step 2: X Fold
Fold one corner of your paper to the edge of the opposite side. Then open and repeat on the other side.
Step 3: Tucking Preparation
Pull the top down over itself. Then open. After, fold the paper in half length-wise.
Step 4: Tucking Folds
Tuck the paper into itself as shown in the photos. Then proceed to pull the paper up to the center front as cited. Repeat on the other side.
Step 5: Wing Fold
Fold your Twin Shark in half along the center with it's large dorsal fin on the inside. About 3/4 inch above the center fold of the aircraft, fold the wing down to reveal the vertical fin. Repeat on the other side.
Step 6: Fin Folding
Fold one of your fins down along the wing root as shown. Repeat on the other side. Then pull the tips of the fins up to the wing root as pictured.
Step 7: Winglet Folds
Open your aircraft as shown in the picture. Fold in half along its center and fold a winglet from the outer half inch of the wing. Repeat on the other side.
Step 8: Taping
Open your aircraft up and tape the cited places.
Places to tape:
Nose front of the fin folds (along the leading edge)
The wings just forward of the rear on top
The plane should be secure after this step.
Step 9: Flight
Your Twin Shark is now ready to fly into whatever mission you sent it, as one of the most stable and fast planes you can have.