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TomcatViP

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Viewing 15 posts - 3,586 through 3,600 (of 5,621 total)
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  • TomcatViP
    Participant

    Nice stealth porn…. I need a cig.

    We.. like all good porn, it’s not depicting the truth: the F35 have its lunburg lens fitted.

    You can switch off that cigar 😉

    in reply to: Turkish Air force bombs ISIS and PKK #2198131
    TomcatViP
    Participant

    Thank you Andraxxus. Much appreciated. It is difficult to get a clear picture of the events in the Int. press.

    Do we know the relative proportion of sorties b/w PKK and ISIS targets ?

    in reply to: 3D printed 'plane' takes off near Southampton. #2198200
    TomcatViP
    Participant

    Elliptical wing?! Has this hing seen any aerodynamist or was it printed right from someone playstation?

    “Radical advances in capability often start with small steps. The launch of a 3D-printed aircraft from HMS Mersey is a small glimpse into the innovation and forward thinking that is now embedded in our Navy’s approach. “

    in reply to: War in Yemen (2015) #2198629
    TomcatViP
    Participant

    New 5 days truce after tragic event

    air strikes in Taiz province […] reportedly killed 120 people, including civilians.

    Source:
    the BBC.com

    in reply to: test pilot: "F-35 can't dogfight" #2198633
    TomcatViP
    Participant

    that’s what happens when someone drag himself out of a gentlemen talk. He gets hastily typed comments as a paid back. Why should I care?

    By the way, you’ll notice that you do not have my permission to edit the screenshot. Thx in advance

    in reply to: Military Aviation News-2015 #2198635
    TomcatViP
    Participant

    Chinese new AG600 large amphibious plane to counter Japanese MV22 cap?

    Amphibious planes like the AG600 would be perfect for resupplying the new artificial islands that the Chinese are building in the SCS [South China Sea]. At the same time, these islands would be excellent bases of operations for the AG600 to engage in maritime patrols of claimed territories.
    […]
    The aircraft is powered by four turboprop WJ-6 engines and has a range of 5,500 kilometers. It has a maximum take-off weight of 60 tons and can carry up to 50 people. […] cruise speed of this seaplane is 480kms per hour.

    Source:
    thediplomat.com/

    in reply to: test pilot: "F-35 can't dogfight" #2198640
    TomcatViP
    Participant

    So now the F22 has no “close coupled” engines ?!!!

    Let me guess, it’s parceque it is not Fr ?

    in reply to: test pilot: "F-35 can't dogfight" #2198665
    TomcatViP
    Participant

    Thrust = Massflow x speed of exhaust gases

    You are confusing Massflow and Mass

    Mass flow refer to the quantity of air flowing inside the engine at a given time. Massflow is in [kg per second (kg/s)]

    Ideal Laval nozzle exhaust law converge toward
    Ve = 2.5V_body
    with Ve being the exhaust gasses speed in the plan of exhaust.

    http://exploration.grc.nasa.gov/education/rocket/Images/rockth.gif

    In the image above, the thrust is maximum when the pressure of exhaust gasses are equal to ambiant pressure (Pe = P0)
    m_dot is you MassFlow
    The mass flow of fuel in a turbine engine is generally considered negligible for an early approximation (M_dot_Air + M_dot_Fuel ~= M_dot_Air).

    Source:
    exploration.grc.nasa.gov/education/

    in reply to: test pilot: "F-35 can't dogfight" #2198673
    TomcatViP
    Participant

    I will repeat again, your screenshot doesn`t have anything to do with high AoA roll Su-35S was doing and that is a fact. The plane can roll/yaw from 0 to 90° AoA and that`s what matters (be it post stall regime or not). Any other plane (PAK FA, MKI/MKM/MKA/SM excluded) will stall and departure from controlled flight trying to do that. Any other plane that can roll/yaw at high AoA (such as F-18 or F-35) will have few times slower rate than Su-35S which translates to highly superior nose pointing.

    You also claim that Su-35S max sustained AoA is about 35° which is also false.

    https://www.youtube.com/watch?v=BK8cg1guFAw

    In this video at 7:40s Sergey Bogdan is doing maneuver similar to tail slide, but instead of sinking he hits the burners and the plane goes to horizontal flight at extreme AoA. According to him the speed can drop to less than 70 km/h and the AoA can go from 70 to 90° and it is sustained.

    https://www.youtube.com/watch?v=eClkTdqAU8w

    Here at 2:44s you can see Su-30MKI doing High AoA roll and than going to sustained horizontal flight at high AoA. The smoke gives us good reference point regarding flight path vector.

    Malaysians in their demo with MKM like to go much longer in such regime, 7:48s :

    https://www.youtube.com/watch?v=5w4e_2M17Bc

    And here is how it looks like from copilots perspective at 7:14s :

    https://www.youtube.com/watch?v=ye10wt6CWKM

    I`m not the one claiming that Su-35S can sustain max 35° AoA based on very imprecise and quick image editing.

    […]
    I find this to be very reasonable error among other things.

    Frankly Mister[Miss] Peregrine, you are boring me. You cosntant interpretation of the content of my reply is either negative or pejorative. I would expect some proactive thinking from you in order to move this conversation frwd when you can see that I took time to reply and argument with enough detail.

    The screenshot is not how I went around the 35° Max AoA for the Su35. This was stated in the documentation. The pic is simply illustrates this value. And btw, You DO NOT have any right to edit an image without the consent of its author.

    As stated earlier, AoA refers to a wing producing LIFT. Post stall manoeuvre are per def not in the same regime. What you are referring as 90° AoA are attitudes angles. You’ll find enough in the online literature to start studying the matter.

    Until recently, most airplanes with good Max AoA reached that value with much restricted Yaw angle and roll rates (lateral acceleration). Su35 and F35 have somewhat more relaxed ctrl in this range. And it’s all about ctrl. For example, the legacy F18 was tested at 50°AoA in wind tunnel but this perf never reached frontline airframe.

    On the famous video RafaleVsRaptor, you can see that the Rafale have a rather sluggish roll rate around its max Alpha (front sector surfaces such as canard are not a favorable factor -especially horizontal).

    Max AoA benefits:
    – ease of handling during a dogfight (less restriction and exposure to stall)
    – More G at a given airspeed
    – Higher ceiling at a given speed
    -…

    And by the way, when I refered to a 35 depicting 90°AoA in video, I was referring to the F35.

    in reply to: test pilot: "F-35 can't dogfight" #2198810
    TomcatViP
    Participant

    I don`t know what that screenshot has to do with high AoA roll?
    Roll sequence starts at about 3:57 and finishes at 4:03s of the video. You took the screenshot 10 seconds latter. For example, if you took the screenshot at 4:07s the AoA would be much different/higher because velocity vector is pointing downwards. You took the screenshot when the thrust from the engines arrested sinking rate and velocity vector was changed (it is horizontal now) but the AoA relative to the camera remained the same (which can not be said about AoA relative to the wind).
    […]

    Also, every time Su-35S is doing high AoA roll you can see vortex burst at the beginning of the maneuver which is a good sign that the plane is in post stall region.
    I think this video is much better, look at 2:33s: https://www.youtube.com/watch?v=ItSAPdmFFuY
    You still think that this is 35° AoA?

    Edit:

    Your AoA line is also off because it goes trough the center of the nose cone which we know is pointing few degrees downwards in Flanker. It does not represent the real AoA. The real AoA is higher even for that screenshot.

    Max AoA refer to the sustained angle btw the tractory and the wing chord line. Transient AoA in post-stall regime is something different.
    I took the above screenshot while the plane was flying in a straight line… showcasing its Max AoA.

    There are videos of the 35 at +90° transient AoA…

    I do not intend to have the kind of precision in a quick image editing to take in consideration the nose droop of the Flanker… C’mon, let’s remain reasonable.

    in reply to: UCAV/UAV/UAS News and discussion 2015 #2198821
    TomcatViP
    Participant

    USAF mentions indeed a system failure. But the state of the airframe might confirm that the MQ1 has an emergency recovery mode (drain tanks and auto terrain approach).

    in reply to: Military Aviation News-2015 #2198823
    TomcatViP
    Participant

    Notice: the content bellow as been also posted in the F35 thread

    An illustration of the technological gains for national aircraft industry through offsets: Field expertise for an integrated industry*

    Cost of US Air Force Decoy Systems Reduced

    Raytheon said the airframe for the Miniature Air Lanch Decoy, or MALD, and MALD-J systems was developed in partnership with Fokker Technologies of the Netherlands and Italy’s Dallara and reduces the airframe production cost by 25 percent.

    […]

    Fokker Technologies, which develops and produces advanced structures and electrical systems, helped to adapt robots to wind the carbon fiber fuselage of the composite airframe and Dallara applied the lightweight, strong structural technologies used in Indy car racing to airframe accessories.
    […]
    MALD-J adds radar-jamming capability to the basic MALD platform

    EDIT: by the way, I wonder if the Fokker robots are the ones bearing a strange legacy from some Fr R&D of the late 80’s….

    Source:
    http://www.military.com/

    *we had such discussion a while ago in the Rafale thread

    TomcatViP
    Participant

    An illustration of the technological gains for national aircraft industry through offsets: Field expertise for an integrated industry*

    Cost of US Air Force Decoy Systems Reduced

    Raytheon said the airframe for the Miniature Air Lanch Decoy, or MALD, and MALD-J systems was developed in partnership with Fokker Technologies of the Netherlands and Italy’s Dallara and reduces the airframe production cost by 25 percent.

    […]

    Fokker Technologies, which develops and produces advanced structures and electrical systems, helped to adapt robots to wind the carbon fiber fuselage of the composite airframe and Dallara applied the lightweight, strong structural technologies used in Indy car racing to airframe accessories.
    […]
    MALD-J adds radar-jamming capability to the basic MALD platform

    Source:
    http://www.military.com/

    *we had such discussion a while ago in the Rafale thread

    in reply to: test pilot: "F-35 can't dogfight" #2198853
    TomcatViP
    Participant

    No. The High AoA roll are post stall manoeuvres.

    Here is a screenshot from your video (https://www.youtube.com/watch?v=rPzBaQnkDTk) (@4min13s)

    http://srdfmc.free.fr/images/Su35AoA.jpg

    We are in the 35° range, which is an excellent cap and represents a 7° increase since the legacy Su27 (+25%)*.

    in reply to: UCAV/UAV/UAS News and discussion 2015 #2198857
    TomcatViP
    Participant

    The quest for Mission system Open Architecture for UAVs (USAF): MOAST

    I presume that the goal is to fasten, secure and ease payload design by third party teams (non OEM).

    Read the announcement (not an RFP/RFI)

    Source:
    C4ISRNET.com

Viewing 15 posts - 3,586 through 3,600 (of 5,621 total)