Bf109 test data

[Robo.]

Originally Posted by csThor

On the Bf 109 E-3/b, E-4/b and E-7 and the engine thingy. Do not distinguish the bomb carriers too much, especially not when talking about the engine. IIRC not a single E-3/b was produced (unsurprising since the E-3 went out of production even before the Luftwaffe even thought about using the 109 as Jabo) so any potential aircraft of that type would be converts. Although this is somewhat doubtful since they would most likely be upgraded to E-4 standards at the same time and labeled E-4/b afterwards, anyway.

IMO the E-4 (and E-4/b) would be the most probable candidates for the 601Aa while E-1 and E-3 should feature the 601A. IMO, of course.

There was a theory that the Aa low alt performance (take-off HP) was desirable for the JaBo variants and therefore Aa DBs were primarily used for /B variants. Only 25% 601s were Aas. This theory is supported by the fact that every JaBo 109 examined after being shot down has had Aa engine (AND the bomb rack installed.) I am aware that this is just a theory and it is not mine after all, but it makes sense.

Maybe you are right and the numerous engine overhauls would cause for majority of the later BoB Emils flying with Aas despite the lower overall number of 601 made (e.g. one airframe could have several engines installed during its lifespan). What we have now is a DB 601 with A-1 FTH and Aa rating, that is certainly incorrect.