Adrodd fel Amhriodol

' Avro 707A tail-less delta-wing research aircraft (part of the Avro 698 Vulcan research effort, of which it was a 1/3 aerodynamic replica) '

Dywedwch wrthym pam mae’r cynnwys hwn yn amhriodol *(gofynnol)

Dewis categori *(gofynnol)

Os ‘Arall’ rhowch fanylion (dewisol)

Eich enw (dewisol)

Eich cyfeiriad e-bost (dewisol)

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