The current milestone for first hover flight of this aircraft, taken from the AHS calendar is July 14 1954. An alternative source (Journal of the AHS, Vol. 1, No. 1, page 57) states that this was actually the first hover flight of the second prototype. This source states that the first flight of the first prototype was February 11 1954. It also states the aircraft name as 'Convertiplane' not 'Convertaplane'.
Can anyone clarify which of these 2 sources provides the definitive information?
* Last updated by: comodo15 on 7/14/2016 @ 9:32 AM *