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matt

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Viewing 15 posts - 2,506 through 2,520 (of 3,292 total)
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  • matt
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    The young modulus of carbon fiber is not endless high. It is possible to produce a forward swept wing with it. But with those rails you got extra momentums to counter. So you would need a material with a higher young’s modulus or you had to increase the size of your structural elements,but there are limits given by the aerodynamic and weight. An other solution would be a lower g-limit. Lets say 4.5 instead of 9 or so. That is what I meant with decraesed manouverability caused by this rail-construction. Even if you use Si-Si-C (silicon infiltrated silicon carbide), you will have a problem with the limited dimensions.

    Have a look at any other canard/delta. None of them has the canards placed in that way. Most of them have only one rudder, so no problem with the turbulences caused by the canards. The MiG 1.42 has the canards in a position, the don’t effect the rudders, too. Now let’s have a look at this design: those canards are placed pretty high. The turbulent airstream produced by the canards hits directly the rudders. That means they are less effective, additionally turbulences will cause vibrations. Vibrations mean you need a stronger structure, to counter them. This means weight.

    My conclusion is: it is an great looking aircraft. It is limited to 5 g. It has a damn short range, because it’s structure is pretty heavy and provides not much space for fuel.
    But it should have a good low speed handling. It is the perfect …. heli-buster !

    the modulus is not the problem as forward swept wings have already been made using composite materials.

    These materials are used in mil and civil applications i.e. T300 (torayca/Toray of japan) and IM7/8552 (hexcel composites USA as used in F/A-18’s EFA etc etc. (T300 being lesser of the two).

    the problem is the compression strength, and delamination resistance fracture toughness modes I+II.

    in the end though to cut it short, the wing structure thickness would be/is so high that you would not be able to store any fuel in them as can be done with conventional wings.

    and you cant use Si-Si-C in a structure thats going to be pounded constantly thats suicidel! and do you mean Silican coated carbon carbon? ceramics ?

    XN-70 garnoc!

    in reply to: Not exactly military but think of the uses ;) #2669652
    matt
    Participant

    why does the cargo have to solid? why not gather up all the midges in scotland and dump em on some one else ?

    or drop icecream onto a hostile city! hey its more good then dropping crappy propaganda pamflets!

    in reply to: LFI or MCA #2669655
    matt
    Participant

    best bet would be minimal mods to the LCA uprated electronics. job done.

    in reply to: LFI or MCA #2669742
    matt
    Participant

    If the MCA is only to be a attack then i hazard to guess that it would be more like an updated Jaguar then a su-34 or pak-fa, and they do mention that it will be a next gen LCA so seems like a LCA with two engines…

    in reply to: Reviving big bombers for the USAF #2672982
    matt
    Participant

    http://www.airforce-technology.com/projects/tu160/tu1606.html

    http://www.airforce-technology.com/projects/tu160/images/tu160_1.jpg

    http://www.fas.org/nuke/guide/russia/bomber/tu-22m.htm

    Please tell me where the wing is positioned on the airplanes you have just said ..

    why not?
    the americans with their engines, electronics and weapons could transform it into the most powerfull bomber ever, and for so cheap, seriously, it could work.
    Camaro.

    in reply to: Reviving big bombers for the USAF #2672986
    matt
    Participant

    dear mnatt.
    (1)the reason the dreamliner is of not use as a bomber (unlike the B-52) is simple, look at the wings, high wing on the B-52 and low on the 7E7.(1)

    (2)you want the whole fuselage as usefull space, so you can fill it up with your payload, so the answer is to design it with high wing (wich is in turn attached to each other via a wing centerbox filled up with fuel, wich also in the case of a low wing, uses a lot of precisely that space you want.(2)

    in the case of the B-1, its another type of construction, to have a low wing, and the wing centerbox is in this case hollow,

    (3)so as to put payload and no necesarely fuel as on a comercial jetliner, nor B-52, also limiting its range.(3)

    there are many more reasons still, thats why you wont see any jetliner doing such a job.
    i hope this helps 🙂
    Camaro.

    1) dont understand what wing hight has to do with this for now.

    2) still dont understand, because apart from the internal mechanisms the main issue is take of weight

    3)
    480,000 lbs + 8,500 isnt enough for you? what you want the bomber to go around the world twice before it gets to its target just to confuse the intended target? why not go around 3 times odd numbers are always good.

    ive read the reports and their seem to be a conflicting requirements. the dreamliner has the range and the payload ability it would also have a great structural life.

    Its velocity also fits in between the main arguments for a new bomber. supersonic Vs subsonic.

    it has the ability to carry 480,000/2.2 * 0.35 (if going by assumption that 33perscent of take offweight is structural in modern aircraft 60 for old) = 76363.64Kg’s of weapons and people.. how is that bad?

    in reply to: What jet did your country start off with? #2673156
    matt
    Participant

    i do like the vampire 🙂 their was another one which looked similar but never got past being a prototype 🙁

    in reply to: Reviving big bombers for the USAF #2673160
    matt
    Participant

    Boeing 7E7-8 Dreamliner
    Brief Description:

    The Boeing 7E7-8 Dreamliner is a super-efficient airplane with new passenger-pleasing features. It will bring the economics of large jet transports to the middle of the market, using 20 percent less fuel than any other airplane of its size.

    Seating:

    217 passengers in three-class configuration

    Range:

    8,500 nautical miles (15,700 km)

    Configuration:

    Twin aisle

    Cross Section:

    226 inches (574 centimeters)

    Wing Span:

    193 feet (59 meters)

    Length:

    182 feet (56 meters)

    Cruise Speed:

    Mach 0.85

    Cargo Capacity After Passenger Bags:

    5 pallets + 5 LD3s

    Maximum Takeoff Weight:

    480,000 lbs

    Program Milestones:

    Authority to offer: Late 2003
    Assembly start: 2006
    First flight: 2007
    Certification/Entry into service: 2008

    in reply to: Reviving big bombers for the USAF #2673163
    matt
    Participant

    I say turn the dreamliner into a bomber! its not impossible and well they have done cross pollination before with the boeing 7X7 series and the B-52

    in reply to: Great clip of a Tor-M1 launch #2673340
    matt
    Participant

    Wow great vid very hi-tech.

    shows the problems all major million+ armies have in equipment for soldiers, i.e. steel/tin helmets.

    but great vid.

    in reply to: FC-1 thread – (Prototype 03 onward) #2673894
    matt
    Participant

    thanks golden dragon 🙂 that just made my JF-17 pic collection reach 300!!!

    😮

    300 pics for an aircraft that is supposed to be shrouded in secresy and a red curtain so to speak :S

    Thats pretty good.

    how is it possible to leak 300 photos out ? even some non secret projects are harder to photograph..

    matt
    Participant

    Wonder if the Indian Airforce would buy a M3K’ed instead of the M2K currently offered. I.e. all the avionics, engine upgrades etc that were ment for the 4K

    matt
    Participant

    J-10 Flying Tiger? 😀

    I’d like to see a shark mouth painted on the J-10 intakes.

    Flying tiger hidden dragon ?

    O_o sounds familiar

    matt
    Participant

    Airplanes should be named after food items.. why? because it’s neutral in everyway!

    The F-14 Dorito
    The F-18 Hamburger
    the F-18E Double Hamburger

    for Chinese airplanes..

    the J-7 Spring roll
    the J-10 Kung Pao Chicken
    the FC-1 Char Siu Pork

    NOOOOO WAY A F-14 is a Dorito, its more like a VEG SUPREME WITH EXTRA TOPINGS! or its a SPICEY BEAN BURGER WITH EXTRA LETTUCE

    No its a PANINI WITH CUCUMBER, TRIED TOMS, OLIVE, CHEESE and SALSA sauce.

    matt
    Participant

    It was reported that Chengdu aircrafts will named after animals of prey. so the

    next in series is Tiger.

    Ohh will they build the YAG PANZER ? or the YAG TIGER? 😀

Viewing 15 posts - 2,506 through 2,520 (of 3,292 total)