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Light Stealth Aircraft (LSA) - Concept Aircraft

Discussion in 'Indian Air Force' started by randomradio, Mar 19, 2016.

  1. vstol jockey

    vstol jockey Colonel MILITARY STRATEGIST

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  2. vstol jockey

    vstol jockey Colonel MILITARY STRATEGIST

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    This is the N-LCA main gear certified for 7.2m/s vertical velocity at 10.5k kgs landing weight. MSA will need certification for same weight but with just 6.6m/s vertical velocity. So MSA can use this gear directly. MSA oleo design is lighter compared to N-LCA as it will need the oleo minus the fuselage attachment extension of N-LCA. See the red cross part. MSA gets full 3m as wheel track which perfectly fits the RGS of Vikky and IAC-1.
    upload_2017-9-5_16-45-53.png
     
  3. vstol jockey

    vstol jockey Colonel MILITARY STRATEGIST

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    For last one week, I was busy trying to figure out perfect placement for main gear and finally, I found the answer yesterday. Fitting all this stuff inside asmall fuselage of 13.75m is quite a task. Now the final internal load out of LSA/MSA is 2xMeteor/8xSPICE250/2xHarpoon in main bays + 4xAstra Mk1 in side bays+2xASRAAM on wingtips.
    Earlier we had 2xMICA/ASRAAM in upper side bays. But I decided to drop MICA from the options for internal load out due to very big fin size of 56 cms. Astra has just 44 cms fin size and Mk2 variant is likely to have even smaller fins.
    The design of main gear+Oleo now confirms to the design and is compatible with the bulkhead strutures I had posted earlier.
     
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  4. randomradio

    randomradio Mod Staff Member MODERATOR

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    So the Meteor is too big for the main bays? I thought you could carry 3 at least, the F-35 compatible version.
     
  5. vstol jockey

    vstol jockey Colonel MILITARY STRATEGIST

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    as per available literature, the clipped fin Meteor with revised intakes is likely to be available only after 2023. The clipped wing version can be carried on all internal bays of MSA which means a total of six.Till its in normal config, it can be carried only in main bay.
     
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  6. randomradio

    randomradio Mod Staff Member MODERATOR

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    So I suppose there will not be much of a delay between the clipped fin Meteor becoming operational to India taking deliveries for the MSA.

    But won't an Indian or Russian RAMJET also become available by then?
     
  7. vstol jockey

    vstol jockey Colonel MILITARY STRATEGIST

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    it depends on size of missile. It must fit inside 32cms box for side bays.for main bays 50cms box is ok.
     
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  8. The enlightened

    The enlightened 2nd Lieutant FULL MEMBER

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    Posted on Mar/20/2016.
    Hahahaha

    Its unbelievable how far, a small roll of crack can take you. It has taken this forum 150 pages and still there are no signs that the conspirators plan on ever returning to reality. Sad
     
  9. vstol jockey

    vstol jockey Colonel MILITARY STRATEGIST

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    Yes. The problem started after I decided to change the design from SE to TE as suggested by few friends in IN. This involves a whole lot of additional calculations, drawings, performance evaluation for TE and SE engine performance from shore and Deck. Its basically now four aicraft. The performance has to be studied for Twin and Single engine operating conditions from shore and than repeat that for Deck ops. I am one man without a team of engineers doing it all by myself with help from a fellow Indian.
    More over read the title properly. Its a concept aircraft.
     
  10. Schwifty

    Schwifty 2nd Lieutant FULL MEMBER

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  11. vstol jockey

    vstol jockey Colonel MILITARY STRATEGIST

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    Finally the studies for revised MSA-N have been completed and the design frozen. It is now more of a flying wing and I will not be able to share even the outline design. But one very important aspect is that all the effort done for N-LCA till date gets utilised by MSA-N including the main gear, tail hook and the FCS. MSA-N will now be a 22.5 ton aircraft with 2xF404-GE-J2F3 engines from the earliest prototypes of LCA with 53Kn dry and 84Kn wet thrust. These engines will be replaced by Upgraded Kaveri. The comparison with other competing aircraft is given below.
    upload_2017-9-13_19-14-14.png
     
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  12. vstol jockey

    vstol jockey Colonel MILITARY STRATEGIST

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    The N-LCA gear is certified for 9 ton or 19820 Lbs max trap weight with 7.1 m/s vertical velocity resulting in a max landing energy of 166861 Lbs. MSA-N has a max trap weight of 11500 kgs or 25323 Lbs with requirement of max vertical velocity of 6.11 m/s and max landing energy of 158145 Lbs. This lower landing energy for MSA-N means that using the same landing gear as that of N-LCA, MSA can land back with 11.75 tons while the requirement is 11.5 tons only.
    The story about the tail hook is also same. The tail hook of N-LCA can be directly used for MSA-N as it will be able to absorb the trap energy of MSA-N also.
    upload_2017-9-13_19-26-25.png
     
  13. vstol jockey

    vstol jockey Colonel MILITARY STRATEGIST

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    The Take off performance calculations for MSA-N are,
    upload_2017-9-13_19-33-26.png
     
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  14. vstol jockey

    vstol jockey Colonel MILITARY STRATEGIST

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    MSA-N will have a unique capability that it will be able to launch at full MTOW and also climb out with full payload even if one engine fails after exiting Ramp. However the prototypes powered with F404-GE-F2J3 engines will not be able to do so and will require jettisoning of all external loads to able to fly out on single engine in case one of them fails. For landing performance, there is no limit what so ever and MSA-N will have better single engine climb, waive off/Bolter performance compared to any twin engine fighter operating from deck any where in the world. You need to read the calculations below with take off performance which show you the wing born target velocity for each configuration.
    upload_2017-9-13_19-40-46.png
     
  15. vstol jockey

    vstol jockey Colonel MILITARY STRATEGIST

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    MSA-N now has a wing area of 45.45sqm with 10m wing span. The wingtip sensor pod with RCS shaping like those of confirmal pods seen on some aircraft with 35cms width are detachable. They will be attached to the wingtips just like the wingtip missiles and two men can remove/attach them in less than five minutes. This will help reduce the wing span to 9.3m and allow MSA-N to operate from both Vikky & IAC-1 without constraints.
    MSA-N Airframe - MSA-N will use the complete hydraulic system including heat exchangers, electrical distribution, engine bleed, wing tank pressurisation, ECS with higher capacity, Secondary flight control surfaces like flaps & Slats, Canopy, Crew Escape system, Engine start system from jaguar aircraft. MSA-N will also use EHSAs based Primary flight control surface system. The landing gear, Tail hook, fuel dumping system & OBOGs will be taken from N-LCA while the IFR will be taken from Mig-29K which will be made fully recessed for reduced RCS. The bay door actuation system will be based on hydraulic linear actuators and rotary actuators. The main wheels are same as that of Rafale-M 790x275mm R15 to cope with higher loads and provide increased breaking efficiency. The airframe will be built using composites for skin, cockpit section, wings, rudders and engine compartment while the wing box housing the main bay, side bays and main wheels will be made using Al-Li alloys, Titanium and Aermat-100 Steel. The bay doors and under carriage doors will also be built using composites. The cockpit and the wind shield will be able to withstand hits by 12.5mm gun shots using material developed within India by other service providers like MTU of Kanpur and DRDO.

    MSA-N FCS – MSA-N will have fully NVG compatible HALBIT Cockpit-NG glass cockpit. The FCS will be a complete replica of N-LCA FCS with autopilot, auto throttle for twin engine configuration and FBW in Direct law as MSA-N is a stable aircraft with 6-8% positive static stability margin. The DFCC, DADC, Mission computers, HUD, HMDS, will also be copied from N-LCA/DARIN-3. The low level penetration on auto pilot coupled to Radalt/TerCom, return to home, auto recovery, hands off launch features of N-LCA will be part of the MSA-N FCS also with inclusion of Pilot incapacitation identification & DVI included in it. The complete system will have BITE and fault diagnostic system as is prevalent on Airbus commercial aircraft.
     
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