Question: Where did Leonardo da Vinci test his flying machines according to his manuscript of 18 pages ?

text: List of works by Leonardo da Vinci
Manuscripts

Leonardo da Vinci (1452-1519) was one of the leading artists of the High Renaissance. Fifteen artworks are generally attributed either in whole or in large part to him. However, it is believed that he made many more, only for them to be lost over the years or remain unidentified. The authorship of several paintings traditionally attributed to Leonardo is disputed. Two major works are known only as copies. Works are regularly attributed to Leonardo with varying degrees of credibility. None of Leonardo's paintings are signed. The attributions here draw on the opinions of various scholars. The small number of surviving paintings is due in part to Leonardo's frequently disastrous experimentation with new techniques and his chronic procrastination. Nevertheless, these few works together with his notebooks, which contain drawings, scientific diagrams, and his thoughts on the nature of painting, comprise a contribution to later generations of artists rivalled only by that of his contemporary, Michelangelo.
Details Pages Notes Dates
Codex Atlanticus C.A . Pinacoteca Ambrosiana , Milan 1,119 12 volumes , collated by the sculptor Pompeo Leoni 1478-1519
Codex Windsor W. Royal Collection , Windsor 153  1478-1518
Codex Arundel B.L. , Arundel MS. or Br.M . British Library , London 283  1480-1518
Codex Trivulzianus Triv . Biblioteca Trivulziana , Castello Sforzesco , Milan 55 ( originally 62 )  c. 1487-1490
Codex Forster Forster I , II and III ( including I , I and II ) ; formerly known as S.K.M . I , II and III Victoria and Albert Museum , London 354 Five pocket notebooks bound into three volumes , here listed in chronological order . I.2 ( Milan , c. 1487-1490 ) : Discusses hydraulic engineering , the moving and raising of water and perpetual motion . III ( Milan , c. 1490-1493 : Notes on geometry , weights and hydraulics interspersed with sketches of horses legs , what might be designs for ball costumes and a description of the anatomy of the human head . II.1 ( Milan , c. 1495 ) : Notes on the theory of proportions and other miscellaneous material . II.2 ( Milan , 1495-1497 ) : Notes on the theory of weights , traction , stresses and balances . I.1 ( Florence , 1505 ) : Notes on the measurement of solid bodies and on topology 1487-1505
Paris Manuscripts A , B , C , D , E , F , G , H ( including H , H and H ) , I ( including I and I ) , K ( including K , K and K ) , L and M Bibliothèque de lInstitut de France , Paris more than 2500 12 volumes , here listed in chronological order . B ( 1488-1490 ; 84 folios ) : Notebook including designs for flying machines ( including the helicopter ) , a submarine , centrally-planned churches and war machines . C ( 1490-91 ; 28 folios . One section missing . ) Treatise on light and shade ; also discusses flow of water and percussion . A ( c. 1492 ) : Fragment of a larger MS which included the Codex Ashburnham II . Subjects covered include painting , perspective , water and mechanics . H ( 1493-94 ; 142 folios ) : Three pocket notebooks bound together . Discusses Euclidean geometry and the design of drawing materials . M ( late 1490s-1500 ; 48 folios ) : A pocket notebook on geometry , ballistics and botany . L ( 1497-1502 ; 94 folios ) : A notebook on military engineering , used by Leonardo when he was in the employ of Cesare Borgia . K ( 1503-1508 ; 128 folios ) : Three pocket notebooks , mainly on geometry . I ( 1497-1505 ; 139 folios ) : Two pocket notebooks with notes on geometry , architecture , Latin , perspective and proportions for painters . D ( 1508-09 ; 10 folios with 20 drawings ) : Discusses theories of vision . F ( 1508-1513 ; 96 folios ) : Discusses water , optics , geology and astronomy . E ( 1513-14 ; originally 96 folios ) : Discusses weights and the effects of gravity , an invention for draining the Pontine Marshes , geometry , painting and the flight of birds . G ( 1510-1515 ; 93 folios ) : Primarily discusses botany 1488-1505
Codex Madrid Madrid I and Madrid II Biblioteca Nacional de España , Madrid  Two volumes , rediscovered in 1966 . I ( 1490s ) : Mainly concerned with the science of mechanisms . II ( 1503-04 ) : Miscellaneous drawings , including maps of the Arno relating to the project to divert its course and notes and drawings relating to the casting of the Sforza monument 1490s-1504
Codex Ashburnham Ash.I . or B.N.2037 ( formerly part of MS.B . ) Ash.II or B.N.2038 ( formerly part of MS.A . ) Bibliothèque de lInstitut de France , Paris  Two volumes , taken out of Paris Manuscripts A and B and sold to the Earl of Ashburnham , who returned them to Paris in 1890 c. 1492
Codex on the Flight of Birds Turin Biblioteca Reale , Turin 18 Originally part of Paris Manuscript B ; probably stolen by Count Guglielmo Libri in around 1840-1847 dated 1505
Codex Leicester Leic . Private collection , United States 72  1506-1510
Codex Urbinas and libro A Urb . and L°A . Biblioteca Apostolica Vaticana , Vatican City  An anthology of writings by Leonardo compiled after his death by his pupil Francesco Melzi . An abridged version was published in 1651 as a treatise on painting ( Trattato della Pittura ) c. 1530