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May 4, 2012
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Alice Hawkeye Compound Aircraft by Stealthflanker Alice Hawkeye Compound Aircraft by Stealthflanker
Alice Hawkeye Attack Compound Aircraft
Under Development In BLender 3D Ver 2.49

Specifications
Nicknames :
-Soultaker (School Newspaper)
-Murderous Bitch (Bullies Class)
-Hybrid Gunship (Lita Alexandra)

Dimensions

Length : 19.17 m
Total Length : 21.38 m
Wingspan : 11,24 m
Height (Fuselage) : 3.8 m
Height (Total) : 5.04 m
Main Rotor Diameter : 13.81 m
Tail Rotor Diameter : N/A
Rotor Area : 149,79 Sqm
Wing Area : 32.8 m

Weight Statement

Empty Weight : 8224.138 Kg
Fuel Capacity : 2793.103 Kg
Payload Capability : 4500 Kg
MTOW : 15600 Kg

Performance

Maximum Speed : 500 Km/h
Typical Cruise Speed : 300 km/h
Disc Loading : 104,15 Kg/Sqm
Power Loading : N/A
Number of Engines : 2x Ixiom Dameena Turbofan
Thrust Capability : 4168,13 Kgf/ Engine
SFC (SLS) : 0,425
Mission Endurance : 4 hrs
Range : 1300 km
(Full Internal fuel, 3000Kg payload, Optimum engine setting with SFC of 0,3)
Affiliations : Friendly to my main character

Background

This is the latest iteration of our Hawkeye attack helicopter family.
Resulted from requirements assigned to our helicopter design class for
heavier armaments, longer range, improved fire control suite
and maneuverability than our current Liza Hawkeye attack helicopter.

Another design objective is to outperform school elite guard's attack
helicopters and counter mech based weapons developed by bullies class.

It was projected by our planners that soon our types of attack helos
like Elsa and Liza hawkeye will soon be vulnerable to newly deployed
bullies class's mech weapons and possibly new school elite guard's attack helo
and close support mobile AA weapons, the juggernaut.

In order to fullfill above mentioned requirements. Our design team come
up with a radical solution, that is to adopt compound aircraft layout.

Compund aircraft or convertiplane, known as early as 1950's with Fairey
Rotodyne as one of the famous example, offers VTOL performance as
helicopters, suitable for deployment in rough field and LHD's while
having similar speed and range as typical fixed wing aircrafts.

The main rotors of the compound aircraft does not need to provide
forward speed as typical helicopters, instead forward speed is provided
by dedicated engines. Our design team investigated two possible solution
first is propeller based thruster and jet engine.
The former solution is attractive and has been used in the past
(YAH-56 Cheyenne, Sikorsky X-2)thus offers maturity and reduced cost.

However the advantages of the propeller based thruster might be offset
by need to provide a long shaft and extra gearbox to power the propeller.
The shaft duct may also need to be armored, this may incur weight penalty
and may reduce internal volume available for fuel or countermeasure suites.

The propeller itself are also considered as possible source of single point
failure as battle damage to the propeller (e.g propeller is destroyed) would
means that the aircraft will totally lost its forward thrust capability.
Which will preclude any possibilities to escape and return to base.

Our design team later decided to provide forward thrust capability from
two nacelle mounted turbofan engine. The turbofan is a medium bypass type
having SLS SFC of around 0.3-0.5 and bypass ratio of 3.
The SFC parameters of this engine is Comparable to many turboshaft
engine that powers typical helicopters.

The engine named as "Ixiom Dameena" capable of generating over 3000 Kgf of thrust
bringing total thrust capability of some 6000 Kgf.

During take-off or hovering the turbofans will provide most of its power to the main rotor
via shaft from the high pressure turbine to the main gearbox located in the middle section of
fuselage. The gearbox will reduce the rpm of the shaft, to the level suitable for operating
level of typical rotors. The main gearbox, will also drive 2 three phase AC/DC generators
which will provide electrical power to the aircraft.

In transitional mode from hovering flight to horizontal fixed wing aircraft type flight modes
the the main gearbox will disconnect itself from the turbofan, relying on auto-rotate instead.
This modes will slow down the blade tip speed, reducing acoustic signature and reduce interference flow
to the wing. The turbofan engine will switch to "thrust generating" modes, increasing fuel flow
to the combustion chamber to produce thrust.

The jet engine duct is armored with composite titanium armor capable of withstanding direct hit from 30mm projectiles
or sharpnels of exploding MANPADS.

Controls in horizontal flight modes will be no different than typical fixed wing aircraft, achieved through
hydraulically actuated control surface. Alice Hawkeye is provided with ailerons and tail stabilizers

There is also an APU (Auxilliary Power Unit), in shape of small gas turbine engine located just ahead of the
main gearbox and behind Fuel tank no I, burning the same fuel as the main engine. This APU is used to start
the turbofan and in case of emergency (e.g loss of both engine), providing power to the main rotor,
reducing descent rate and minimize fatality during crash landing.


In aerodynamic performance, our design team faced difficulties, especially to balance between high speed requirements
and hover performance. In this type of rotary wing aircraft. Hover performance is expected to be poorer than typical helicopters
due to reduction of effective disc area due to wing obstruction. However improvements in blade technology and availability of
supercomputing capability allow our design team to solve the problem.

Alice Hawkeye used a specially customized airfoil for her main rotor blades, designed to improve hover capability and to delay formation of
shockwave in high tip speed mach number, reducing acoustic signature. The figure of merit of the blade is around 0,7-0,8 a typical for
state of the art blade designed for hover.

During the horizontal flight phase, the wing will generate most of the lift required to fly, it use typical aircraft airfoil.
Maximum Lift to Drag ratio of Alice Hawkeye is 7, better than typical helicopters but lesser than typical fixed wing due to interaction
with flow from main rotor with wing.

This L/D ratio however is considered enough to "drive" Alice a longer distance than typical helicopters, with over 1300 km range
in internal fuel only, with 3000 Kg of weapons load, an impressive figure for attack helicopters.

The range and endurance can be further extended through provision of external fuel tank or air refuelling
limited only by pilot and gunner's health conditions. Our health expert however consider 5-10 hours to be the maximum.

Avionics is mainly digital types to reduce weight and saving spaces for fuel and armor systems. The core of the avionics lies in
Digital computers named as "Hermione", calculating weapons delivery solutions, correcting flight stability, receive and interpret inputs from
Alice's Sensors and display the result to the pilots or gunners.

The display presentation is based on LED Screen technology, there is also conventional "steam gauge" dials for backup in case of emergency. The
flight critical avionics however also have backup power, generated from APU.

Flight controls is digital fly by optics type, with special "training modes" with built in tutorials from basic stuff till weapons delivery.
This mode simplify training requirements and even obviates need of human instructor as the training modules is constructed with "follow what i show"
and "press button i highlighted" The trainee can also select gender of the digital instructor, Korolev for male and Svetlana for female.

Sensors are typical of ground support aircrafts, centered around optical and mmwave based RADAR. Alice hawkeye is equipped with Salyut multimode FLIR
for pilot, this FLIR provides nightvision and digital enhancement of the image, provided by onboard LIDAR (Laser Imaging Detection and Ranging). the
FLIR also allows targeting for air to air missiles and gunnery in self defense scenario. The FLIR however have limited field of view, to reduce drag.

Gunners seated in front have an improvements of sensors mounted in our previous Liza and Elsa Hawkeye, named as Vostok M. This sensor have six
windows, each with own optical suites and laser illuminator, allowing Alice to engage more targets (up to six simultaneously) than Liza or Elsa.
Vostok M also have similar capability as the Salyut.

RADAR sensor is provided by Topaz phased array RADAR system which works in mm wave band. This RADAR is capable of detecting air target with effective
reflecing area (RCS) of 0,1 Sqm of typical missiles from 5 km. Detection range of moving objects like tanks is around 10-12 km. The RADAR can provide
firing solution for Remora ATGM allowing "surprise shot" where Remora is fired without illumination from Vostok Illuminator. During mid course phase
The missile is steered via mmwave command link provided by Topaz. In terminal phase of some 300 m to 1 km from target Laser Illuminator is then engaged.

The missile can later switch back to its Semi Active LASER homing. This scheme reduces reaction time of the tanks, thus improve missile's lethality.

ESM sensors is provided by Helicopter variants of our Valesca ESM family. The helicopter variants however posessed fewer numbers of antenna, centered
in dedicated mast located above top propeller. Providing 360 degrees coverage around Alice. The ESM system comprised up with network of spiral antenna
array forming a phase interferometer emitter locating. Receiving hardwares are provided by superheterodyne receiver that handling the signals received
by the antenna, demodulates and later identify types of emitter encountered.

The ESM system is also capable to locate emitter in such precision that allow emitter engagement to be made using Anti Radiation Missile

There is also Infra Red based MAWS (Missile Approach Warning System) with multiple aperture spread around the fuselage. The MAWS will detect incoming
missiles by aerodynamic heating generated by missile's friction with ambient air, and then determine its angular coordinate for handoff to countermeasures.

For countermeasure suite. Alice hawkeye are equipped with both Radio Frequency (RF) based ECM in shape of Gardeniya jammer. The Jammer are capable of performing
Range-Velocity Gate stealing and terrain bounce jamming to deceive incoming RADAR guided (Semi active or Active) missiles. To counter IR guided missiles
Alice hawkeye is equipped with "Cyclops" Infra Red Countermeasure System in shape of three turrets located underfuselage. Each turret contain LASER based
emitter. The laser is modulated to produce angular error tracking for incoming IR Missiles using reticle based modulators to obtain angular tracks on target.
The Emitter can also be used to dazzle the missile, overpowering their IR elements. Thereby temporarily "Blind" the missile thus render it incapable to
home in. Classical form countermeasures such as flares and chaffs are also available.

For Armaments section, Alice Hawkeye is comparable to typical attack aircrafts such as Sea Harrier and Su-25, capable of carrying over 4000 Kg of munitions
ranged from iron bombs to Uranium cruise missiles, bringing Alice's "level of armaments" surpass that of typical attack helicopters.

Usual armaments however are similar as Liza and Elsa Hawkeye, but in larger number, Alice Hawkeye is capable of carrying over 32 Remora ATGM, FFAR and self
defense AAM.

When stand-off attack capability is required Alice can carry long range AGM's like TV/IR Guided or RADAR guided Uranium missile with range of 130 km. Target
informations can be supplied by third party of programmed by Alice's gunner. Datalink for midcourse correction can be provided by Tekon datalink pod
mounted under the nacelle, this pod will continuously updates missile position to gunner, provide real-time image of TV guided seeker and transmit command
from the gunner. Once the missile is launched Alice may later make U turn and hover at safe position until missile impact.

Anti Radiation Missiles can also be carried such as Russian Kh-31PD and Kh-58 UsHke with range of over 100 Km. Allowing Alice to engage SAM engagement RADAR's
such as MPQ-65 owned by School Elite Guard

Gun armaments are provided by two fixed 30mm autocannon mounted ventrally, this cannon can be deflected by around 5 degrees downward providing strafe attack
capability without changing pitch. Although the fixed emplacement does not provide flexibility as the turreted one it can yield better accuracy and have more
space for more ammunitions.

For armor section, over 1500-2000 Kg of Alice Hawkeye's empty weight is dedicated for armor protection and safety features, such as ejection seat and composite
titanium armor around cockpit capable of withstanding 30 mm rounds. The canopy is also hardened, requiring micro detonation cords to shatter it thus allowing ejection
Engine frame mounting is also armored, made of titanium and stainless steel, providing structural strength and ballistic resistance against enemy rounds.


And for some trivial matter.. when this attack helicopter appeared... school newspaper quickly named it as "Soultaker". First pilot that pilot the Alice was our
Home Room teacher Sophie in pilot position. Gunner position is occupied by Harry Stanper our ground forces leader. The test flight proceed smoothly with release
of armaments, some aerobatics and air refuelling from our Shateya Fidereal cargo jet converted into tanker. Proving the capability of Alice Hawkeye.


Well that's all for now ...more to come later :D
Add a Comment:
 
:iconsomeone1fy:
someone1fy Featured By Owner Oct 3, 2013
Dosen't it have any machine cannon?
Reply
:iconstealthflanker:
Stealthflanker Featured By Owner Oct 3, 2013  Hobbyist Digital Artist
it has two fixed autocannon located ventrally
Reply
:iconld-silverhawks:
LD-SILVERHAWKS Featured By Owner Jul 25, 2013  Hobbyist Traditional Artist
NICE FUTURIST GUNSHIP!!! You've take some reference on the AV-8B for the main structure and you had the rotor and other chopper equipment. good idea :w00t:
Reply
:iconstealthflanker:
Stealthflanker Featured By Owner Jul 26, 2013  Hobbyist Digital Artist
thanks a lot :D
Reply
:iconcommander-fillmore:
Commander-Fillmore Featured By Owner Jan 25, 2013
very cool looking design dude
Reply
:iconstealthflanker:
Stealthflanker Featured By Owner Jan 25, 2013  Hobbyist Digital Artist
Thanks :D
Reply
:iconcommander-fillmore:
Commander-Fillmore Featured By Owner Jan 25, 2013
your welcome dude
Reply
:icontemplar127:
templar127 Featured By Owner Aug 7, 2012
NICE!
Reply
:iconstealthflanker:
Stealthflanker Featured By Owner Aug 7, 2012  Hobbyist Digital Artist
Thanks a lot :D
Reply
:icontemplar127:
templar127 Featured By Owner Aug 7, 2012
ur welcome!
Reply
Add a Comment: