Mathias what are the differences Early & Late series ?
Model?
flight dynamics?
Power?
BR
Tom
All of that, Tom.
As David sais, each sub variants has a unique set of flight dynamiks reflecting changes in weight, drag, manouverability, engine performance, all that.
The early variants come with 9 models, A-1 through A-4, while the A-2 through A-4 have a variant each with and without outer wing MGFF cannons. In addition there's an export variant Aa-3 which was kind of a mix of A-1 and A-3 (A-1 aramament with A-3 engine). Also there's the A-4/U7, a version with externally visible engine air intakes with a considerably higher critical altitude. The A-4 also has versions with the early style fixed cooling slots and the adjustable cooling flaps that where implemented at some point during the production run.
The A-1 uses the BMW801C-1 engine at 1600PS (not hp) which was severally plagued by overheating problems.
The A-2 uses the thermically somewhat improved BMW801C-2.
The A-3 is equipped with the first batch of BMW801D-2 rated at 1730PS, yet suffering from being prone to overboost damage so that it was usually flown some 200 PS short of it's "theoretical" power.
That's the one the British got their hands on in 1942.
The engine troubles where widestly ironed out when the A-4 entered production so this one is the first really combat-worthy variant, if you will. The A-4 received a new radio which required a modified tail section along with several changes to the cockpit.
Common to all early variants is the lack of blind flying equipment and navigational aids so these are short range day fighters, very agil yet particularly hampered by engine reliability.
Beginning with the A-5 (the first of the late variants) the engine has been moved forward, an artificial horizon has been added and radio navigation equipment was implemented.
The cockpit layout of the late variants changed several times.
The A-6 finally retired the old outer wing MGFF and replaced them with Mg151/20 E.
From the A-7 onwards an improved BMW801D-2 was used, the F-600 rated at 1800PS.
The A-7 also saw the replacement of the nose MG17 with the larger caliber Mg131, giving it the characteristic bulgs on the upper nose. The A-8 sees the implementation of a variometer and a yet again considerably changed cockpit layout. Also an additional 115 liter fuel tank aft of the pilot along with the underbelly fuel/bomb rack being moved fore to make up for the CoG change.
The A-8 Sturmjäger with additional armor use "erhöhte Notleistung" (augmented emergency power) delivering 2000PS,
the A-9 with the bubble canopy uses the BMW801TS, kind of a bastard engine build from components of not materialized projects (basically made of better alloys along with a larger oil cooler allowing for higher manifold pressure) delivering 2000PS takeoff power and 2200 PS augmented emergency power.
If you need more details I'd suggest to read the handbooks, available here:
http://www.classics-hangar.de/downloads_en.htm