timepass
Brigadier
Yup... but prior to J31, PAF is eyeing on J10Ds....
IMHO, we will see J10Ds in PAF colors prior to J31.
Shenyang FC-31 / J-31 Fighter Demonstrator
- Thread starter RedSky
- Start date
Yup... but prior to J31, PAF is eyeing on J10Ds....
IMHO, we will see J10Ds in PAF colors prior to J31.
manqiangrexue or others specialists
I have see in this long conversation with RAM coating especialy for F-22 is heavy you say " few tons " can you say me more please ?
And exict view/pics of RAM coating ( not sure possible ) it's thick severals cms it looks like what ?
I have see in this long conversation with RAM coating especialy for F-22 is heavy you say " few tons " can you say me more please ?
And exict view/pics of RAM coating ( not sure possible ) it's thick severals cms it looks like what ?
NO, it does not weigh a few ton's,, the RAM on the MC-130E Combat Talon was around 400lbs, which is a LOT of weight for paint,,, it is thick, and it looks and feels "organic", like skin, one of the reasons I have stated the Raptor looks organic, or like a living skin on a animal, the F-35 is even slicker, and gorgeous, with that same organic look and touch.
The F-35s coating is more or less "baked in" during the manufacturing process...... it is the final touch, for very outstanding L/O.
manqiangrexue
Brigadier
Ah yes. So what happened was on the J-20 thread, we were wondering how much RAM weighs and I also thought it would be negligible since it's just skin. Then, someone, I think Santos, came and said that the average surface area to cover for a heavy fighter is 200m^2. Then he said that the paint is metallic; you cannot absorb radar waves with Home Depot paint LOL. So assuming a 3mm thick skin with 200m^2 surface area, that is 0.6m^3 of metallic material. Calculating with density of iron at 7.9 tonnes per m^3, that makes the RAM 5 tonnes. That's very very heavy so we were thinking it would be significantly less than that since RAM isn't just pure iron. But also, we didn't check sources for the claim of 200m^2 average surface area of heavy fighter, we didn't check sources for 3mm thick skin and we of course don't know the actual weight of the material. So a LOT of things could be wrong with our assumptions but it gave every member participating the idea that RAM could weigh a few tons. I'm very much open if we get any real evidence that it weighs less (or more).
Say the X-band radar has a frequency of 10GHz, that translates to 30mm wavelength. The optimal thickness will be 1/4 of wavelength, it comes to 7.5mm. That seems not practical to have the RAM layer being solid "paint"?
manqiangrexue
Brigadier
Beats me. I'd like to be educated about stealth fighter RAM design and weight if that's not highly classified.
SinoSoldier
Colonel
Yes, and there are some very nice pictures floating around on Twitter! glad to see people finally taking this awesome airplane seriously.
We're basically working from the difference between the YF-22 and F-22 in weight; the former was around 15 tons, the latter around 20 tons. Size, weapons bays, radar pose issues, but one big difference would be the addition of RAM.