This model of the Dayton-Wright Racer is built with a profile fuselage covered on one side. Wing span is 16 inches   Information on the prototype is available at  Dayton-Wright Racer - Wikipedia and is displayed at the Henry Ford Museum in Dearborn MI.  It had a variable camber wing and retractable landing gear, both remarkable for the early 1920's.  I've flown my model in an old Hangar in Rantoul, IL, and one flight lasted 80 seconds. A kit is available from RetroRC, and plans by Mike Welshans are in FAC newsletter issue 258 (March/April 2011).

The airframe weighs 11.7 grams, and total weight with 2.0 grams of rubber is 13.7 grams.  Wing Area is 60 square inches.  The length from propeller hook to the rear hook for the rubber motor is 10.75 inches.  A 15.5 inch loop (2 strands) of 3/32 inch wide rubber turns a 7 inch diameter Peck Plastic propeller. Winding to 1300 to 1500 turns (90-100 turns using 1:15 winder)  gives a good climb to over 20 feet, and about 80 seconds flight time in a suitable room or outdoors in a calm.