The bridge analogy doesn't work in this case. An arch bridge is strong when the dead load or live load is acting vertically down due to gravity at a gradual rate. A bird strike comes horizontally impacting kinetic energy at immense speed (due to the fighter moving towards the bird). Stationary structural analysis is completely different to material structural analysis design.
J-20... The New Generation Fighter III
- Thread starter siegecrossbow
- Start date
- Status
The bridge analogy doesn't work in this case. An arch bridge is strong when the dead load or live load is acting vertically down due to gravity at a gradual rate. A bird strike comes horizontally impacting kinetic energy at immense speed (due to the fighter moving towards the bird). Stationary structural analysis is completely different to material structural analysis design.
MiG-29
Banned Idiot
it is not my estimate, russian sources and books by Yefim Gordom, claim it measures without probe 13.46, so yeah probably the J-20 is around 20.2
meters, it just simply looks longer because the nacelles are larger than F-22
see
Модификация МиГ-21Ф-13
Размах крыла, м 7.15 wing span
Длина, м 13.46 length
however if this is correct the J-20 is almost 20.9
Technical data and flying characteristics of the J-7 / F-7
In the table below each generations of the J-7 / F-7 is represented by one version too.
Parameter I/A M III MG FT-7
Length w/o pitot tube (m) 13,46 13,95 14,10 13,95 13,46
Last edited:
Red___Sword
Junior Member
Yes, thank you Mig-29 and challenger and whoever one-liner-web-digger alike, thanks to your throw-ups that SDF members have began another wave of crusade to find the holy-Sangreal: The J-20's size.
One day, when the actual J-20 enters service, the size of it is NOT something "I have to kill you after tell you" stuff, and the only differences knowing it (eye bull it) between THEN and NOW - is like the difference one took a three night queue ups, to get THE FIRST iphone 5 - and one walks in a store to buy it on the spot, some days later.
So cheer up guys, China revealed a functioning "Underground Great Wall" nuclear 2nd strike program to the average Joes and Zhangs by boardcasting it on TV, China WILL tell you the B-W-H dimension of the "4th Princess" (If you haven't hear this name yet, that's the first nickname for J-20 ever around)
One day, when the actual J-20 enters service, the size of it is NOT something "I have to kill you after tell you" stuff, and the only differences knowing it (eye bull it) between THEN and NOW - is like the difference one took a three night queue ups, to get THE FIRST iphone 5 - and one walks in a store to buy it on the spot, some days later.
So cheer up guys, China revealed a functioning "Underground Great Wall" nuclear 2nd strike program to the average Joes and Zhangs by boardcasting it on TV, China WILL tell you the B-W-H dimension of the "4th Princess" (If you haven't hear this name yet, that's the first nickname for J-20 ever around)
we all certainly don't enjoy pointless discussion going in circles, but the picture was indeed interesting (for me) and gives us the best reference objects so far
the same position of camera, the same setting/lens when taking the photos, the same background building, even almost the same position of the aircrafts passing by, hence little perspective error, maybe the only deviation would be the position of the aircraft relative to the centre line of the tarmac
which for now, leads us to the assumption that J-20 is much closer to the 20m figure, rather than the 22m figure
for me that's a good find
the same position of camera, the same setting/lens when taking the photos, the same background building, even almost the same position of the aircrafts passing by, hence little perspective error, maybe the only deviation would be the position of the aircraft relative to the centre line of the tarmac
which for now, leads us to the assumption that J-20 is much closer to the 20m figure, rather than the 22m figure
for me that's a good find
*rollseyes* Couldn't just leave it at that could we.
I just noticed it says J-7E on the tail, so we at least know it's the E variant.
EDIT:
Annddd found. It says 13.46 meters.
This isn't helping huh?
EDIT2: The good news is I've done some research, and the JF-17 figure we should be using is 14.97 meters.
Last edited:
MiG-29
Banned Idiot
those wikipedia numbers do not make sense, the original J-7 were 13.46 like the MiG-21-13, however it gives higher numbers, but yeah the most likely is J-20 is between 20.2-20.9 meters.
Check out my last post in keypub. I'm pretty sure those wiki numbers are wrong. On the other hand, if you measured the length of the J-7 from the nose to the tail plane, your J-7 is too short. It's length is from the nose to the vertical tail (that protrudes) out a bit. Using both the 14.885 figure with probe and 13.95 figure without probe I got something around 20.5 meters. I compared these measurements with potential measures of the JF-17 and found a cluster of values around 20.5.
MiG-29
Banned Idiot
i did use the vertical tail, but the matter rest on the J-7, because is an aircraft pretty well known, in the West, in Russia.
Time will tell its real size but on the meantime i think it is between 20.2 to 20.9, the relation J-7/J-20 is roughly 1:1.5 in size and it will change little so using 13.46 or 13.95 only adds 70cm not a lot, i always thought it was between 20.5-21.5 meters but now i see it is 20-21 meters but not more than 21, in fact i think 20.9 is the max and 20.2 its minimun, but its nacelles are at least 2-3 meters longer than F-22`s
Last edited:
They're probably half of that actually. keep in mind that in place of a usual engine shroud and nozzles, the 2D TVC nozzles look shorter. The tip of the TVC nozzles reach about halfway the length of the tail planes. That shouldn't be 3 meter difference, and is probably less than 2 meters.
MiG-29
Banned Idiot
do a pixel count of a F-22 and J-20, you will find the F-22`s nozzels and you will see from nose tip to nozzle tips is around 16.7 meters and J-20 is around 19.7 from nose to nozzles considering it measures 20.3 and around 20.3 meters if it measures 20.9 meters
Last edited:
- Status