Sorry, helps if one types the acronym properly! I've corrected that now.
Hesham: you're right, the postwar designations do seem illogical. The constant appears to be 'P' for designer Ermenegildo Preti. So, does PR and PM suggest the involvement of other designers? 'M' could, of course, be for Milano. But, if so, why is it only applied to the Tartuca?
For postwar CVV designations, I've got the "versioni motorizzate" of the CVV.6 Canguro. Neither seem to have been given distinct designations. I've seen the pusher-propeller version assigned the designation 'P.25' but this is surely a confusion with its 22 hp Ambrosini P-25 2-cyl horizontally-opposed engine. The Turbomeca jet-powered Canguro Palas still carried the original CVV.6 designation it seems. Other are:
PR.2 Saltafossi (Ditch-Hopper): cabin lightplane with 3-cyl Macchi MB.2 motor. Completed in 1946 but it's not clear whether the prototype actually flew prior to the 2002 flight of the restored (and re-engined) aircraft.
PM.280 Tartuca (Tortoise): 1947 low-wing single-seater racer, 60 hp CNA flat 4-cyl.
-- retractable gear, 260 km/h on 60 hp engine
-- NB: Dominique Mahieu also lists a PM.80 Tartuca [typo?]http://www.hag-italy.it/FotoAlbum/tabid/60/galleryType/SlideShow/ItemID/142/language/it-IT/Default.aspxhttp://www.flightglobal.com/pdfarchive/view/1962/1962%20-%200524.html
-- photos of both PM.280 and P.19
P.110 - 3-4 seat low-wing cabin monoplane, precursor to the P.111
-- aka known as Agusta P.110 or Politecnico P-110, I-COLJ
P.111: 4-seat low-wing cabin monoplane, 145 hp Alfa Romeo 110 4-cyl, prototype by Agusta
P.19 Scricciolo (Wren): 1959 2-seat trainer for Aero Club d'Italia.
-- Series production by Aviamilano. 51 built (incl. prototype).
- P.19 - tailwheel undercarriage
- P.19Tr - tricycle undercarriage
- P.19R - rebuild with 150 hp Lycoming for use as glider tug
Going back to Aviamilano, the well-known F.8L Falco and its 4-seater F.14 Nibbio derivative are obviously Frati designs as were the later F.250 and F.260 prototypes. But who designed the A-2 Standard sailplane?