eCharcha.Com   Support eCharcha.Com. Click on sponsor ad to shop online!

Advertise Here

Go Back   eCharcha.Com > Current Affairs > Defense

Notices

Defense Defense and national security...

Reply
 
Thread Tools Display Modes
  #1  
Old January 12th, 2001, 07:41 AM
padhu's Avatar
padhu padhu is offline
Third Echelon
 
Join Date: Aug 2000
Location: USA
Posts: 3,316
padhu is a name known to allpadhu is a name known to allpadhu is a name known to allpadhu is a name known to allpadhu is a name known to allpadhu is a name known to all
Smile

The Indian Light Combat Aircraft (LCA) is the world's smallest, light weight, multi-role combat aircraft designed to meet the requirements of Indian Air Force as its frontline multi-mission single-seat tactical aircraft to replace the MiG-21 series of aircraft. The delta wing configuration , with no tailplanes or foreplanes, features a single vertical fin. The LCA is constructed of aluminium-lithium alloys, carbon-fibre composites, and titanium. LCA integrates modern design concepts and the state-of-art technologies such as relaxed static stability, flyby-wire Flight Control System, Advanced Digital Cockpit, Multi-Mode Radar, Integrated Digital Avionics System, Advanced Composite Material Structures and a Flat Rated Engine.

The LCA design has been configured to match the demands of modern combat scenario such as speed, acceleration, maneuverability and agility. Short takeoff and landing, excellent flight performance, safety, reliability and maintainability, are salient features of LCA design. The LCA integrates modern design concepts like static instability, digital fly-by-wire flight control system, integrated avionics, glass cockpit, primary composite structure, multi-mode radar, microprocessor based utility and brake management systems.
The avionics system enhances the role of Light Combat Aircraft as an effective weapon platform. The glass cockpit and hands on throttle and stick (HOTAS) controls reduce pilot workload. Accurate navigation and weapon aiming information on the head up display helps the pilot achieve his mission effectively. The multifunction displays provide information on engine, hydraulics, electrical, flight control and environmental control system on a need-to-know basis along with basic flight and tactical information. Dual redundant display processors (DP) generate computer-generated imagery on these displays. The pilot interacts with the complex avionics systems through a simple multifunction keyboard, and function and sensor selection panels. A state-of-the-art multi-mode radar (MMR), laser designator pod (LDP), forward looking infra-red (FLIR) and other opto-electronic sensors provide accurate target information to enhance kill probabilities. A ring laser gyro (RLG)-based inertial navigation system (INS), provides accurate navigation guidance to the pilot. An advanced electronic warfare (EW) suite enhances the aircraft survivability during deep penetration and combat. Secure and jam-resistant communication systems, such as IFF, VHF/UHF and air-to-air/air-to-ground data link are provided as a part of the avionics suite. All these systems are integrated on three 1553B buses by a centralised 32-bit mission computer (MC) with high throughput which performs weapon computations and flight management, and reconfiguration/redundancy management. Reversionary mission functions are provided by a control and coding unit (CCU). Most of these subsystems have been developed indigenously.

The digital FBW system of the LCA is built around a quadruplex redundant architecture to give it a fail op-fail op-fail safe capability. It employs a powerful digital flight control computer (DFCC) comprising four computing channels, each powered by an independent power supply and all housed in a single line replaceable unit (LRU). The system is designed to meet a probability of loss of control of better than 1x10-7 per flight hour. The DFCC channels are built around 32-bit microprocessors and use a safe subset of Ada language for the implementation of software. The DFCC receives signals from quad rate, acceleration sensors, pilot control stick, rudder pedal, triplex air data system, dual air flow angle sensors, etc. The DFCC channels excite and control the elevon, rudder and leading edge slat hydraulic actuators. The computer interfaces with pilot display elements like multifunction displays through MIL-STD-1553B avionics bus and RS 422 serial link. The digital FBW system of the LCA is built around a quadruplex redundant architecture to give it a fail op-fail op-fail safe capability. It employs a powerful digital flight control computer (DFCC) comprising four computing channels, each powered by an independent power supply and all housed in a single line replaceable unit (LRU). The system is designed to meet a probability of loss of control of better than 1x107 per flight hour. The DFCC channels are built around 32-bit microprocessors and use a safe subset of Ada language for the implementation of software. The DFCC receives signals from quad rate, acceleration sensors, pilot control stick, rudder pedal, triplex air data system, dual air flow angle sensors, etc. The DFCC channels excite and control the elevon, rudder and leading edge slat hydraulic actuators. The computer interfaces with pilot display elements like multifunction displays through MIL-STD-1553B avionics bus and RS 422 serial link.

Multi-mode radar (MMR), the primary mission sensor of the LCA in its air defence role, will be a key determinant of the operational effectiveness of the fighter. This is an X-band, pulse Doppler radar with air-to-air, air-to-ground and air-to-sea modes. Its track-while-scan capability caters to radar functions under multiple target environment. The antenna is a light weight (<5 kg), low profile slotted waveguide array with a multilayer feed network for broad band operation. The salient technical features are: two plane monopulse signals, low side lobe levels and integrated IFF, and GUARD and BITE channels. The heart of MMR is the signal processor, which is built around VLSI-ASICs and i960 processors to meet the functional needs of MMR in different modes of its operation. Its role is to process the radar receiver output, detect and locate targets, create ground map, and provide contour map when selected. Post-detection processor resolves range and Doppler ambiguities and forms plots for subsequent data processor. The special feature of signal processor is its real-time configurability to adapt to requirements depending on selected mode of operation.


Seven weapon stations provided on LCA offer flexibility in the choice of weapons LCA can carry in various mission roles. Provision of drop tanks and inflight refueling probe ensure extended range and flight endurance of demanding missions. Provisions for the growth of hardware and software in the avionics and flight control system, available in LCA, ensure to maintain its effectiveness and advantages as a frontline fighter throughout its service life. For maintenance the aircraft has more than five hundred Line Replaceable Units (LRSs), each tested for performance and capability to meet the severe operational conditions to be encountered.

Hindustan Aeronautics Limited (HAL) is the Principal Partner in the design and fabrication of LCA and its integration leading to flight testing. The LCA has been designed and developed by a consortium of five aircraft research, design, production and product support organizations pooled by the Bangalore-based Aeronautical Development Agency (ADA), under Department of Defense Research and Development Organization (DRDO). Various international aircraft and system manufacturers are also participating in the program with supply of specific equipment, design consultancy and support. For example, GE Aircraft Engines provides the propulsion.

The first prototype of LCA rolled out on 17 November 1995. Two aircraft technology demonstrators are powered by single GE F404/F2J3 augmented turbofan engines. Regular flights with the state-of-the-art "Kaveri" engine, being developed by the Gas Turbine Research Establishment (GTRE) in Bangalore, are planned by 2002, although by mid-1999 the Kaveri engine had yet to achieve the required thrust-to-weight ratio.

The LCA is India's second attempt at an indigenous jet fighter design, following the somewhat unsatisfactory HF-24 Marut Ground Attack Fighter built in limited numbers by Hindustan Aeronautics Limited in the 1950s. Conceived in 1983, the LCA will serve as the Indian air force's frontline tactical plane . The LCA will go into service in the 20153-2020 timeframe.

Following India's nuclear weapons tests in early 1998, the United States placed an embargo on the sale of General Electric 404 jet engines which are to power the LCA. The US also denied the fly-by-wire system for the aircraft sold by the US firm Lockheed-Martin.The first flight awaits completion of the Digital Flight Control Systems, being developed by the Aeronautical Development Establishment (ADE).

SPECIFICATIONS :

Wing Span 8.20 m

Length 13.20 m

Empty Weight 5500 kg

Engine Prototype - GE F404-F2J3 turbofan rated at 18,097 lbst

Production - Kaveri GTX-35VS turbofan rated at 20,200 lbst

Fuel Capacity Internal fuel capacity - 3000 liters
Centerline and the two-inner hardpoints under each wing can carry five 800 liters fuel tanks also has an in-flight refuelling probe

Maximum Range 2500kms

Maximum Speed Mach 1.7

Service Ceiling 50,000 feet.

G Limits +9/-3.5

Armament internally mounted GSh-23mm twin barrel gun with 220 rounds of ammunition Seven external hardpoints, can carry air-to-air missiles, air-to-surface missiles, anti-ship missiles, rocket launchers and ECM pods

Maximum External Stores Load 4000kg (8818 lbs.)

Self Defence RWR system, jammer and chaff & flare dispensers.


Reply With Quote
  #2  
Old January 12th, 2001, 07:56 AM
aryaputra's Avatar
aryaputra aryaputra is offline
Senior eCharchan
 
Join Date: Nov 2000
Posts: 3,228
aryaputra is a splendid one to beholdaryaputra is a splendid one to beholdaryaputra is a splendid one to beholdaryaputra is a splendid one to beholdaryaputra is a splendid one to beholdaryaputra is a splendid one to beholdaryaputra is a splendid one to behold
sound good on it's own.

but for us non-defense crowd, can you give a comparo against another plane in it's class or maybe to one of the popular combat aircrafts like F-16,Mirage... so that we are able to appreciate our indegineous achievement.

Thanks.
__________________
We could learn a lot from crayons:
some are sharp, some are pretty,
some are dull, some have weird names, all are different colors,
but they all have to learn to live in the same box.
Reply With Quote
  #3  
Old January 12th, 2001, 09:19 AM
padhu's Avatar
padhu padhu is offline
Third Echelon
 
Join Date: Aug 2000
Location: USA
Posts: 3,316
padhu is a name known to allpadhu is a name known to allpadhu is a name known to allpadhu is a name known to allpadhu is a name known to allpadhu is a name known to all
Cool compare LCA to others

arya, first of all you cannot compare LCA to the below aircrafts as LCA doesnt fall under this category. It is a much smaller and lighter aircraft but agile, i would say more agile, but comparable to the best. Anyways , here is the comaprism :


WINGSPAN:-
F16: 10mts
Mirage 2000: 30ft
SU-27 Flanker: 62.04sq m
LCA: 8.20 mts

LENGTH:-
F16: 15mts
Mirage 2000: 48ft
SU-27 Flanker: 21.94mts
LCA: 13.20mts


HEIGHT:-
F16: 5mts
Mirage 2000: 17ft
SU-27 Flanker: 5.909 mts
LCA: 4.2 mts

Empty Weight:-
F16: 8500 kg
Mirage 2000: 16000lbs
SU-27 Flanker: 23000lbs
LCA: 5500 kg


MAX SPEED:-
F16: Mach 2+
Mirage 2000: Mach 2.2
SU-27 Flanker: Mach 2.35
LCA: Mach 1.7


MAX ALTITUDE:-
F16: 15000mts
Mirage 2000: 55000ft
SU-27 Flanker: 18500mts
LCA: 50000ft

G LIMITS:-
F16: 9g+
Mirage 2000: 9g
SU-27 Flanker: 9g+
LCA: 9g+

HARDPOINTS:-
F16: (9 Hardpoint) 1 at wingtips, 3 each wing, 1 fuselage and 1 20mm cannon
Mirage 2000: (9 Hardpoints) 5 on fuselage, 2 at wing tips and 2 30mm Cannons
SU-27 Flanker: (10 Hardpoints) 3 on each wing, 4 on fuselage and one 30 mm Cannon
LCA: (7 Hardpoints) 1 on wingtips, 2 on wings , 1 on fuselage and 2 23mm cannon



hope this was enough of a compare...let me know if you want anything else.
Reply With Quote
  #4  
Old January 12th, 2001, 11:52 AM
aryaputra's Avatar
aryaputra aryaputra is offline
Senior eCharchan
 
Join Date: Nov 2000
Posts: 3,228
aryaputra is a splendid one to beholdaryaputra is a splendid one to beholdaryaputra is a splendid one to beholdaryaputra is a splendid one to beholdaryaputra is a splendid one to beholdaryaputra is a splendid one to beholdaryaputra is a splendid one to behold
that was good padhu.

Now I know that at least it is dimensionally more like a F-16 except the delta wing design. Good.

padhu, any pictures available?
Reply With Quote
  #5  
Old January 12th, 2001, 12:02 PM
padhu's Avatar
padhu padhu is offline
Third Echelon
 
Join Date: Aug 2000
Location: USA
Posts: 3,316
padhu is a name known to allpadhu is a name known to allpadhu is a name known to allpadhu is a name known to allpadhu is a name known to allpadhu is a name known to all
pictures ???

pictures of LCA, F-16, Mirage or SU-27. I dont know how to make them available in the post. i can email them to you if you want.
Reply With Quote
  #6  
Old January 12th, 2001, 12:09 PM
aryaputra's Avatar
aryaputra aryaputra is offline
Senior eCharchan
 
Join Date: Nov 2000
Posts: 3,228
aryaputra is a splendid one to beholdaryaputra is a splendid one to beholdaryaputra is a splendid one to beholdaryaputra is a splendid one to beholdaryaputra is a splendid one to beholdaryaputra is a splendid one to beholdaryaputra is a splendid one to behold
sure thing padhu.

mail them at

aryaputra_at_echarcha@hotmail.com

TIA.
__________________
We could learn a lot from crayons:
some are sharp, some are pretty,
some are dull, some have weird names, all are different colors,
but they all have to learn to live in the same box.
Reply With Quote
  #7  
Old January 12th, 2001, 12:24 PM
Chankya Chankya is offline
Junior eCharchan
 
Join Date: Dec 2000
Posts: 38
Chankya is on a distinguished road
Thumbs up Good Pics

Here are two pics of LCA.
http://indya.speedera.net/news.indya...mages/img2.jpg
http://indya.speedera.net/news.indya...mages/img3.jpg
__________________
"When a man has no strength left in him he becomes a sadhu, one without wealth acts like a brahmachari, a sick man behaves like a devotee of the Lord, and when a woman grows old she becomes devoted to her husband"
Reply With Quote
  #8  
Old January 12th, 2001, 02:29 PM
santasingh_in santasingh_in is offline
Junior eCharchan
 
Join Date: Nov 2000
Posts: 76
santasingh_in will become famous soon enoughsantasingh_in will become famous soon enough
hey man something we should be proud of !
__________________
santasingh
Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
IAF enthusiastic about indigenous Light Combat Helicopter ashdoc Defense 5 May 25th, 2010 11:37 AM
Light combat helicopter soon to take test flight ashdoc Defense 10 February 19th, 2010 12:10 PM
Light combat aircraft ' Tejas ' to get foreign engine. ashdoc Defense 24 August 7th, 2009 10:07 AM
Medium Combat Aircraft xanadu Defense 4 April 23rd, 2001 06:39 AM
Medium Combat Aircraft xanadu Defense 0 April 22nd, 2001 10:31 AM


All times are GMT -7. The time now is 01:23 AM.


Powered by vBulletin® Version 3.7.2
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Site Copyright © eCharcha.Com 2000-2012.