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Info EDUARD 06/2023, Page 11
Info EDUARD 06/2023, Page 12
(66gal), the same that already equipped the
Bf 109E-7. The system of pumping fuel from the
auxiliary tank to the main fuel tank was based on
the principle of pressurizing the auxiliary tank
with compressed air, dispensing the need for
a fuel pump. It should be noted that photographs
of the Bf 109F-2 carrying the centerline drop
tank are very rare.
The Bf 109F-2 could also be modified for the
fighter-bomber role by installing an ETC 500/IXb
bomb rack under the fuselage to carry a 250 kg
(550lb) SC 250 aerial bomb, or an ETC 50/VIId
combined bomb rack for four 50 kg (110lb) SC
50 bombs. The designation of the bomb capable
version was Bf 109F-2/B or Bf 109F-2/Bo.
In terms of performance, H.H. Vogt states
a maximum speed of 630 km/h (390mph), and at
sea level, 528 km/h (330mph). According to Vogt,
the rate of climb is the same as that of the F-1,
17 m/s (56ft/s), a range of 700 km (430 miles),
and a service ceiling of 12,000m ((39,300 feet).
M. Baumgartl, in a performance table derived
from the British Research iInstitute R.A.E. at
Farnborough, gives a top speed at 6,629 m
(21,750 ft) 597 km/h (371 mph), 491 km/h (305
mph) at sea level. The Soviet institute NII VVS
gives a top speed 561 km/h (350mph) at 2,900m
(9,500ft) and 510 km/h (317mph) at sea level. The
British data in this case are consistent with the
German figures for the Bf 109F-1. All in all, this
would correspond to the fact that both versions,
the F-1 and F-2, were powered by the same
engine with the same performance, while the
differences in the design of the aircraft were
essentially negligible.
The F-2 also had a number of shortcomings that
manifested themselves in service. A report from
early April, 1941 by the commander of Luftflotte
2, General-Field Marshal Kesselring, described
twenty-four defects of varying degrees of
severity. These were gradually addressed on
the production line, but most were resolved
with the next production version, the Bf 109F-4.
A total of 1,586 Bf 109F-2s (Vogt) were built,
production ran in parallel at five factories: Mtt
Regensburg (228 units produced), Erla Leipzig
(219 units), AGO Oschersleben (378 units), WNF
(169 units) and Arado Warnemünde (358 units),
where production ended in August 1941.
Bf 109F-3
This version was a direct development of the F-1,
and featured a combination of the DB 601E engine
and the MG/FF engine mounted gun. Production
was stopped after 15 aircraft had been built
after the new more powerful MG 151/20 cannon
became available.
Bf 109F-4
Production of the final and most powerful
version of the Bf 109F, the dash-4, began at the
WNF factory in May 1941, and the Erla factory in
June. The first Bf 109F-4s arrived at front line
The nitrous oxide (N2O) injection system
of the GM-1 engine cylinders allowed for
a short-term increase in engine power at
high altitudes (above 9,000m or 29,500ft). The
principle of increasing performance is that
when the mixture burns in the cylinder, nitrous
oxide is decomposed into oxygen and nitrogen.
Nitrogen cools the mixture and oxygen causes
the mixture to become lean (the mixture
contains more oxygen than fuel). Thanks
to this, it is possible to add more fuel to the
mixture, without the need to supplement the
boost pressure with the compressor, because
the necessary additional amount of oxygen
to burn the fuel in the cylinder is obtained by
the decomposition of nitrogen oxide. For this
reason, the GM-1 system was used at high
altitudes. To increase performance at altitudes
of up to 8,000 m (26,250ft), the water injection
system MW 50 or MW 30 was later used, which
reduced the temperature of the mixture by
evaporating the water in the cylinder, but did
not generate the necessary oxygen. This had
to be supplemented by increasing the filling
pressure with a compressor, but could no
longer produce the necessary filling pressure
at higher altitudes.
The GM-1 system increased the DB 601N and E
engine power at 9,000 m and 2600 RPM by up to
246 hp (250 PS), and the aircraft's speed by as
much as 90 km/h. Maximum N2O injection time
was 3 minutes (Baumgartl – sources vary on
the exact numbers.
GM-1
JG 27 Bf 109 F-4 Trop in North Africa. Mechanics are cleaning the barrel of the MG 151/20 cannon.
A photo reconnaissance Bf 109 Fs from the 4.(F)/123 in 1943 at Cherbourg.
Photo: Bundesarchiv
Photo: SDASM
HISTORY
INFO Eduard12
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Bf 109F-2 and Bf 109F-4

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RUFE part two

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Air war over Ukraine - Migs fly East!

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Air war over Ukraine - Another calm before the storm

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