home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Game Killer
/
Game_Killer.bin
/
348.AN225.DOC
< prev
next >
Wrap
Text File
|
1992-10-28
|
4KB
|
76 lines
ANTONOV AN-225 MRIYA
Written and modelled by Tim Vasquez, CIS 71611,2267
The An-225 Mriya (Dream), the largest flying aircraft in the world
today, boasts a wingspan of nearly 100 yards and a maximum takeoff weight
of 1.3 million pounds! It first flew on December 21, 1988, from Kiev,
Ukraine (then USSR), and a series of payload records and performances were
set in 1989. There have even been exhibits at international airshows
touting a possible commercial version for sale which could seat 800
passengers or carry multiple decks of freight.
HISTORY
In 1985 there was a need to transport the Soviet space shuttle, along
with rocket components and equipment for the petroleum, chemical, and
electrical industries, to remote portions of the country. Antonov was
assigned the project, and they based their designs on the already-existing
An-124, an aircraft slightly larger and similar to Lockheed's C-5 Galaxy.
The wing was extended, engines changed from 4 to 6, and the vertical fins
were placed away from the center to eliminate aerodynamic wake effects from
piggybacked cargo.
There are only two An-225s in existence; the aircraft is highly
expensive and its development was a major burden on the Soviet economy
and industry. It is unlikely any more will be built unless financed by
private companies.
PERFORMANCE DATA
Due to its large size, the An-225 suffers from tremendous parasitic
drag. This is offset by its six high-bypass turbofan engines, which come
in at a respectable 51,000 pounds of thrust each. Its rather wide wingspan
and a low aspect ratio contribute to a high lift capability, however, this
and its huge thickness also amounts to a slow cruising speed (in the Mach
.65 to .7 range).
Although I have been unable to find numbers on the An-225's performance,
talk with experienced airline pilots along with technical references suggest
the following data, which has been modelled into the simulation aircraft.
TAKEOFF CHARACTERISTICS, Antonov An-225
V1, takeoff decision speed........................ 115 kts
Vr, rotation speed................................ 121 kts
V2................................................ 135 kts
Takeoff run....................................... 7,500 feet
Takeoff roll
-Flaps 10
-Max power
-Rotate at Vr, aircraft will lift at V2
-Gear up on positive rate of climb
Climbout below 10,000 feet
-Maintain pitch of 4 deg, slow acceleration to flap retraction (148 kts)
-Trim to gradually accelerate to and maintain 250 kts
Climbout 10,000 feet and above
-Maintain pitch of 4 deg, slow acceleration to 400 kts TAS
-Reduce power as needed
Cruise
-Maintain pitch of 0 deg, use power as needed according to load/speed
LANDING CHARACTERISTICS, Antonov An-225
Vref, basic minimum operating speed, full flaps... 105 kts
Vref, flaps 10.................................... 118 kts
Vref, flaps 5..................................... 125 kts
Vref, no flaps.................................... 132 kts
Final approach speed, flaps down.................. 115 kts
Landing run....................................... 5,000 feet
Approach to terminal
-Apply flaps and apply power using flap schedule Vref + 20 knots:
Apply 5 deg flaps upon deceleration through 155 kts
Apply 10 deg flaps upon deceleration through 135 kts
Apply full flaps upon deceleration through 125 kts
Final Approach
-Maintain pitch of 12 deg and 40% power to maintain 115 knots,
adjust power and pitch as required for glidepath