On a clear Saturday morning, Komrade Mike took to the air with his electrically motivated Hobby King 'Spacewalker'. After an enjoyable 6-minute flight Mike landed and was astonished to see that the tips of his rudder and fin were missing together with a large chunk of the upper fuselage!

What could possibly have caused this damage? Was it a Plane? Was it a Bird? Was it Balsa-fatigue? Five other models were flying at the time and no pilot observed any incident and no other model was reported damaged.
Mike remains mystified as to what happened and would like to hear from anyone who can suggest a possible cause.

