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your drawing seems to be missing some parts like the motor mount,the cover over the motor,the side nacells where the servos mount. dimensions for these parts would be helpful for those of us who would like to build your plane.
actually the circuit is the Dunwoody circuit from 1909. Its a fair performer at best, but will still pass muster on local signals. old magnetic headphones are a must...nothing modern will work except sound powered 'phones with a transformer.