Messerschmitt Me-109 F (Source: Jet & Prop Archiv 7)

The F-series had its beginning in the V-21, V-22, V-23 and V-24 prototypes. The F-series was to be powered by the DB 601 E engine, delivering 1350hp on take-of. In the F variant, the airframe of the Me-109 got a overall aerodynamic clean-up. The nose got a new contour, the wing area was increased by adding rounded wing tips and the bracing struts for the tail plane were eliminated.

F-0 (1940)
Ten F-0 pre-production airframes were ordered. As the DB 601E was not yet ready, they were equipped with the DB 601N. Tests of the new type were all positive. The F-0 was armed with two MG 17's and an engine mounted MG FF/M.

F-1 (1940)
The F-1 was identical to the F-0  but was fitted the new MG 151/20 engine mounted machine gun.

F-2 (1941)
The F-2 replaced the engine mounted MG 151/20 with the faster firing MG 151/15.

F-3 (1942)
The F-3 was similar to the F-2 but was finally fitted with the DB 601E.

F-4 (1942)
The F-4 was similar to the F-3 but the engine mounted gun was again exchanged for the MG 151/20. Furthermore self-sealing fuel tanks were used and a armour plate was added behind the pilot.

F-5 (1942)
This was the reconnaissance version of the F-3, carrying no engine mounted gun. It had a ETC rack for a 300l drop tank under the fuselage.

F-6 (1942)
This was the reconnaissance version of the F-5, carrying no armament.

The F-1 to F-4 could be fitted with a ETC 250 rack under the fuselage. Thus modified aircraft were designated with a "/B" behind the type, like F-4/B. Likewise, tropical versions were designated with "/Trop".

From the F-series, aircraft could be fitted with "Rüstsatze". These were field modification kits that could be fitted by mechanics in the field.

Rüstsätze
R1: 2 x MG 151 in gondolas under the wing
R2: unknown
R3: unknown
R4: unknown
R5: a 300l drop tank under the fuselage
R6: a ETC 250 bomb rack with a 250kg bomb

Messerschmitt Me-109 V-24 (Source:  Messerschmitt "O-Nine" Gallery)

Messerschmitt Me-109 V-24 (Source: AJ Press Monografie: Messerschmitt Me-109 Cz. 2)

Messerschmitt Me-109 V-24 (Source: AJ Press Monografie: Messerschmitt Me-109 Cz. 2)

Messerschmitt Me-109 F (Source: Flugzeug Archiv 1)

Messerschmitt Me-109 F (Source: Jet & Prop Archiv 7)

Messerschmitt Me-109 F (Source: Koku Fan Me-109 Special)

Messerschmitt Me-109 F (Source: Koku Fan Me-109 Special)