Shenyang FC-31 / J-31 Fighter Demonstrator

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jobjed

Captain
b787 said:
I will give you a riddle, why if F-22 has 34% of its structure made of composites, compared to the 50% aluminium made F-15 that only has 2% of its structure of composites, why the F-15 Eagle at empty weight weighs 13 tonnes like F-35, and F-22 weighs 19.8 tonnes, Why?
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Due to reasons you can't possibly know since:
  1. You're not an engineer
  2. You're not involved in the F-15 project
  3. You're not involved in the F-22 project
 
manqiangrexue

manqiangrexue

Brigadier
b787 said:
I will give you a riddle, why if F-22 has 34% of its structure made of composites, compared to the 50% aluminium made F-15 that only has 2% of its structure of composites, why the F-15 Eagle at empty weight weighs 13 tonnes like F-35, and F-22 weighs 19.8 tonnes, Why?
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1. That's not a riddle; that's a stupid question.
2. F-22 is 24% composite, not 34. F-15 is 37% aluminum, not 50. Why do you keep making up numbrs even when they are known??
3. I already told you and I don't want to tell you the same damn things over and over again. F-22 has additional things that no F-15 has. It has internal bays; it has rectangular stealth TVC; it has heavier engines; it has a coat of RAM that may weigh a few tons. It probably has many other things too that I don't know for sure which add weight. How heavy is its LPI radar compared to F-15's?
4. And also, aluminum is extremely light, lighter than titanium in case you don't know. So if you were to build a jet with it and with your engineering prowess, found a way to extensively use aluminum to sub it for a comparable volume of titanium without structural faults developing, that makes for a very light jet.

You've already been kicked off the J-20 thread for trolling. I don't want to have this off-topic garbage with you here on J-31 thread either.
 
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b787

b787

Captain
manqiangrexue said:
1. That's not a riddle; that's a stupid question.
2. F-22 is 24% composite, not 34. F-15 is 37% aluminum, not 50. Why do you keep making up numbrs even when they are known??
3. I already told you and I don't want to tell you the same damn things over and over again. F-22 has additional things that no F-15 has. It has internal bays; it has rectangular stealth TVC; it has heavier engines; it has a coat of RAM that may weigh a few tons. It probably has many other things too that I don't know for sure which add weight. How heavy is its LPI radar compared to F-15's?
4. And also, aluminum is extremely light, lighter than titanium in case you don't know. So if you were to build a jet with it and with your engineering prowess, found a way to extensively use aluminum to sub it for a comparable volume of titanium without structural faults developing, that makes for a very light jet.

You've already been kicked off the J-20 thread for trolling. I don't want to have this off-topic garbage with you here on J-31 thread either.
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uhmmm so you Chinese camarades are wrong
Analysis of the influence of advanced materials for aerospace products R&D and manufacturing cost A W Shen1 , J L Guo and Z J Wang Aeronautics and Astronautics Engineering College, Air Force Engineering University, Xi’an, 710038, China E-mail: [email protected]


For example [3], the American fifth-generation fighter F/A-22, the world's most advanced aircraft, uses composite materials in the most important parts of the fuselage, wings, and tail. In fact, titanium alloy makes up 40% of the total weight of this military aircraft, and composite materials make up 34%. Among civilian aircraft, composite materials make up more than 40% of the total weight of the European Airbus Company’s A380, the world's largest airliner



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but you call me a hater hahaha
 
manqiangrexue

manqiangrexue

Brigadier
b787 said:
uhmmm so you Chinese camarades are wrong
but you call me a hater hahaha
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Yes, maybe they are wrong; but maybe my source is wrong... Not sure. My information (F-22 39% ti, 24% comp) is from here:
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You being a hater has no connection to this paper.

Main point: You asked me why F-15 is so much lighter than F-22. Did you like that answer? Or did you not like it and want to move the focus to some detail of F-22 composite 24% vs 34%.
 
b787

b787

Captain
manqiangrexue said:
Yes, maybe they are wrong; but maybe my source is wrong... Not sure. My information (F-22 39% ti, 24% comp) is from here:
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You being a hater has no connection to this paper.

Main point: You asked me why F-15 is so much lighter than F-22. Did you like that answer? Or did you not like it and want to move the focus to some detail of F-22 composite 24% vs 34%.
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The F-22 bucks the trend toward the use of composite materials. Only 35 percent of the bare airframe is composite, although the designers had expected to use
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for F-15
The gradual penetration of composites can be easily seen on the teen-series fighters.

  • Grumman F-14 - boron/epoxy vertical fins.
  • McDonnell Douglas F-15 - 1.2 per cent composites: Fins, stabilators, rudders - boron/epoxy, speedbrakes - graphite/epoxy.
  • GD F-16 - 2.7 per cent composites.
  • MDC F-18 - 10 per cent graphite/epoxy composites: Wing skins, trailing edges, flaps, speedbrake, stabilators, vertical tails, rudders, covers and access doors. (Pic 3).
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Independently it is 24% or 34% the F-15 is only 1.2%.; however the cheer leaders, can not see, F-22 is more composites, more titanium, but it weighs 6 tons more than F-15, why? cheerleaders do not see internal structure is different would the F-22 being made of only aluminium as F-15 it would weight close to 26 tons empty weight, why? simply larger cross section due to weapons bays, S ducts and larger wings, plus 2D nozzle.

J-20 would be made of traditional methods, very likely would weight too 26-27 tons empty weight, so a 25% percent would be around 20 tonnes, but of course cheer leader #1 says 15 tonnes as an F-35 empty weight for J-20 and 10 tons for J-31
 
manqiangrexue

manqiangrexue

Brigadier
b787 said:
for F-15


Independently it is 24% or 34% the F-15 is only 1.2%.; however the cheer leaders, can not see, F-22 is more composites, more titanium, but it weighs 6 tons more than F-15, why? cheerleaders do not see internal structure is different would the F-22 being made of only aluminium as F-15 it would weight close to 26 tons empty weight, why? simply larger cross section due to weapons bays, S ducts and larger wings, plus 2D nozzle.

J-20 would be made of traditional methods, very likely would weight too 26-27 tons empty weight, so a 25% percent would be around 20 tonnes, but of course cheer leader #1 says 15 tonnes as an F-35 empty weight for J-20 and 10 tons for J-31
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Yes, I know. I won't have any meaningful conversation with you since you only make up numbers and ignore reason. I told you not to compared 4th and 5th gen fighters, didn't I? Why don't you bring Me-262 into this while you're at it? LOL

I'll play with you the same number making game you like so much, ok?

J-20 is 26-27 tons. cool. Su-57 is 54.453-56.321 tons. F-22 is 43.562 tons. With Russia's most advanced weight reduction methods, they can probably get Su-57 to about 64.322 tons but only if Putin does the welding himself. Fair?

Fun, cheerleader troll? I can play Drunk Russian Numbers with you all day LOL
 
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b787

b787

Captain
manqiangrexue said:
Yes, I know. I won't have any meaningful conversation with you since you only make up numbers and ignore reason. I'll play with you the same number making game you like so much, ok?

J-20 is 26-27 tons. cool. Su-57 is 54.453-56.321 tons. F-22 is 43.562 tons. With Russia's most advanced weight reduction methods, they can probably get Su-57 to about 64.322 tons. Fair?

Fun, cheerleader troll? I can play Drunk Russian Numbers with you all day LOL
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ah the cheer leader did not read, well common on cheer leaders did you read when in this source


the designers nevertheless reached their weight goal -25% lighter than an all aluminium airframe - by using lot of aluminium, which makes up 41% of airframe weight

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;)

a detail cheer leader #1 forgot


By using composites the F-22 reduced 25% weight, so tell me how much it will weight if it did not use composites and it was made of aluminium, give me a J, gime me a 31, F-22 currently weighs 19.8 tons ;) and F-15 has a lower titanium composition, if F-22 used less composites and titanium it would likely weight around 23-24 tonnes minimun
 
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manqiangrexue

manqiangrexue

Brigadier
b787 said:
ah the cheer leader did not read, well common on cheer leaders did you read when in this source


;)

a detail cheer leader #1 forgot
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Desperate troll rants with drunken Russian math are not worth reading :p

F-22? 19.8 tones to 23-24 tons using conventional construction? Nahhh by my calculations it's more like 42.456 tons.

Got more crazy numbers for you, though this one's a lil too close to the truth. 1,435,235: Russia's GDP... in Japanese yen LOL

PS. I can't help but notice that in your endless sea of incompetence, you mixed up the figures for titanium with aluminum. Very impressive; big surprise:rolleyes:
 
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