Focke Wulf 190A-4\
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History\
For the early development history of the FW190, see the FW190A-3.\
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The A-4 began to see service in early 1943.  It is identical to A-3, with the
exception of the radio and placement of the radio antenna.  The A-4, although it
has the same BMW 801D-2 engine as the A-3, produces 65 more horsepower, because
the A-3's engine was de-rated to extend its service life.  All A series Wulfs
had a sophisticated control system, called the Kommandgerat that coordinated
control of mixture, propeller pitch, and RPM with throttle setting.  In de-rated
Wulfs, a limit was set on available boost in the Kommandgerat, that could not be
overridden by the pilot.  In the A-4 this limit was extended, plus the pilot had
override capability.
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Given that it carried the same weight as the A-3 but with more horsepower, the
A-4 was the supreme dogfighting version of the Focke Wulf 190.  Later marks of
the A series Wulf were heavier, with no corresponding increase in horsepower.
Many, from the A-6 onward, had nitrous oxide injection to boost engine output by
as much as 400hp for short periods.  This, however, only worked at higher
altitudes and the increase elevated the relatively anemic power the 801 produced
up high.\
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The Focke Wulf 190A-4 in Air Warrior\
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This early variant of the Wulf made its debut with the Air Warrior II release.  Thus, 
the A-4 has not yet had a long history in the game.  It, along with the A-3 and D-9, 
have served, thus far, to displace the heavier A-8 which has been in Air Warrior for 
many years.  Nowadays if players elect to fly a Focke Wulf other than the D-9 Dora, 
they tend to fly the A-4.  All A series Focke Wulfs boast extraordinary roll rate and 
lethality, but none of them are a good choice for a low speed dogfight. \
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Armament: two, 7.9mm machine guns in the cowl; four, 20mm cannon in the wings.
Ammo load: 900 machine gun rounds for each cowl gun; 250 cannon shells for each
wing gun.  Payload: one, 550lb bomb.\
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Performance\
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The A-4, like all A series Focke Wulfs, has impressive speed at low to medium
altitudes.  Its numbers begin to fall off above 18,000 feet.  As few fights
online are at high altitudes, this drawback seldom comes into play.  In offline
missions or campaigns, this will rarely prove a factor either, because it
was not tasked with the role of intercepting high altitude bomber formations in
1941-42 when the A-4 flew.  Climb rate is good but unspectacular, as is steady
turn performance.  High speed maneuverability, however, is very good,
particularly in roll performance.\
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Performance Comparison\
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The Focke Wulf A4 is one of the fastest WWII fighters at low to medium altitudes
- faster below 20k than all propeller driven aircraft it faced during its era.\
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Comparing climb numbers, however, reveals the superiority of the Spitfire, and
the Me109 in this department.\
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Turn performance comparisons favor the Wulf at high speeds.  It is, however,
not as outstanding in low speed turns, or sustained turn rate.  This, more than
any other comparative performance aspect, dictates the tactics you should use
when flying the Focke Wulf, particularly online against human pilots only.\
