A P-30 class plane is a beginner plane limited to 30 inches in length and span.  It must weigh at least 50 grams, with a maximum of 10 grams rubber installed.  The propeller is a 9.5 inch diameter commercial one made of plastic, by AMA rule. The wing of the Peck "One Night 28" was increased from 28 inches to nearly 30 inches, and the tail was modified to pop up at a time determined by a fuse.  I haven't used this feature, because I couldn't get it to fly quite as long as the 2 minute "max" anyway.  The rubber motor is made up of 6 strands (3 loops) of 1/8 inch wide rubber 20 inches long, to meet the 10 gram rule.  I can wind it sufficiently (about 900 turns) to fly over a minute most days, depending on wind and rising "thermal" air.  Total weight is 57 grams, only about 7 grams above minimum. Wing Area is 126 square inches, making wing loading 2.3 ounces per square foot, and cube loading 2.5 ounces per cubic foot.