Originally posted by straffo
Mark Ib 44 , it's not really an hybrid ,just the propeller is different.
Mk 1B - 1942
4 bladed prop - late 43 (only shortened take-off run)
bubble canopy - late 43
Problems comes with the boost, which is suspect.
Not even sure if ours is a Sabre IIa, IIb or IIc.
Rockets and eggs from fall 1943.
So take your choice -
1943 if a bubble canopy, a 4 bladed prop count, and ord capacity count as performance changes.
1942 if they don't.
Seen the argument used for the 109 with the extra stuff (armour plating etc), that as it didn't increase performance it should be slotted in at its earlier introduction date. (which i believed happened in the AVA)
Same argument over the old Spit IX - Some classed it as mid 44 because of 50-cals, even though performance was strictly based on 1942 F IX.
Edit - Dug out a few things -
July 1943 - +7 boost 1 hour, +9 boost 5 mins
Now tell me its a 1944 Tiffy?