I built this very light model of a Taylorcraft in 2008 from a kit by MicroX, a defunct firm with a well designed group of models.  It is light for its size, at an airframe weight of 19 grams, but may be slightly off scale. 

Its wing span is 21.5 inches.  After I made minor modifications to the power set up, it began flying fairly well, and then it flew into one of the many thickets at Bong Recreation Area and disappeared.  I need to build another one. 

 The Taylorcraft flew best with a 12 inch loop of 3/16 inch wide rubber, turning a 6 inch Peck Plastic Propeller.  Length from prop hook to rear rubber peg was 10.25 inches.  Rubber weighed not quite 3 grams.  Winding to about 900 turns gave good climb out and best times.  Wing area is 52 square inches, and wing loading was a bit over 2 ounces per square foot with cube loading of 3.4 ounces per cubic foot.  Winds at Bong tossed it around, so times were variable with best near a minute.  This sensitivity to wind finally tossed the Taylorcraft into a thicket, and it was lost.