I finally made a great segmented plane design and so if broken it's easy to fix as you just need to cut the broken piece and replace it.only needs paper and tape or glue.

Steps to make a paper glider that can travel about 20 metres if launched from a balcony(built in sections so if broken it will be easy for you to repair)

Gather 7 up to 9 strips of paper 21x11 cm(might need 2 for ballast)

Fold 3 of them in half and fold them in half again to get 4 folds. Fold them to get a triangle shape , table them 1, 2, 3 and join them. 1 is always the front.

For the wings, search aerofoil and you would see how to make it.

Make 1 support or 2 (for this part bamboo will be a very nice material too)if you wish and tape or glue them right before the joint in 2 meets joint 1.

Tape or glue your finished wings on to the support.

For the tail, take one of your strips and cut 5-6 cm from it.

Make an aerofoil a little bit longer than your wings with the longer piece and for the smaller piece fold the bottom a bit to enable a base to glue or tape on.

Last step, throw it slowly and make sure it will land on a smooth surface. If its nose climbs up and stalls, try to roll up one of your extra slips.
If that still doesn't work then add some more.

Do not try this design in inches as the paper would be too weak.

Normal mass is 10 up to 14 grams

Pics following