In 1898, Bell experimented with tetrahedral box kites and wings constructed of multiple compound tetrahedral kites covered in maroon silk.[N 23] The tetrahedral wings were named Cygnet I, II and III, and were flown both unmanned and manned (Cygnet I crashed during a flight carrying Selfridge) in the period from 1907–1912. Some of Bell's kites are on display at the Alexander Graham Bell National Historic Site. COUNT 5
QSN1 What color silk covered Bell's kites? ANS1 maroon QSN2 Who was on Cygnet I when it crashed? ANS2 Selfridge QSN3 Bell's kits were flown from 1907 to what year? ANS3 1912 QSN4 How many tetrahedral wings did Bell create? ANS4 3 QSN5 Some of the kites remain at what National Historic Site? ANS5 Alexander Graham Bell