Quote Originally Posted by Bill Berson View Post
The lightest uncertified Dacron from Aircraft Spruce should work. With perhaps two coats of dope or acrylic exterior house paint. I would definately rib stitch or aluminum pop rivet (if metal ribs) the fabric securely to the ribs.
Fabric adds weight, so check for aft weight shift.
If it's like most older ultralights it probably had sewn sails rather than doped fabric.