zzzz here we go, I dont want to re-invent the wheels. found some old messages and photos.
Framed canopy, Fully exposed compressor face. Gaps around the inlets. Seams, gaps, protrusions, changes in surface material, sudden changes in shape, and surface, discontinuities all over the lower fuselage. --- by Martian2
other than that, we have comments from famous persons.
something is very interesting, at the introduction of T50 and J20, US had different comments
“I didn’t see anything … that would cause me to rethink plans for the F-
22 or F-35,” Air Force Secretary Michael Donley told reporters Feb. 18 at
the Air Force Association’s winter conference, held in Orlando, Fla.
The Air Force ordered the last of its 187 F-22s in 2009. Russia has not had
a new fighter in nearly 20 years; the Indian air force is also sponsoring
development of a version of the T-50.
“It looks like a plane we’ve seen before,” Gen. Roger Brady, the air boss
for NATO and commander of U.S. Air Forces in Europe, said at the conference.
Gen. Gary North, commander of Pacific Air Forces, made clear his impression
of the fighter: “I guess the greatest flattery is how much they copy you.”
---------compare-----
Richard Aboulafia, an aviation analyst with the Teal Group, an aerospace and defense consulting firm,
"When the photos were first released to the public, The J-20 struck fear in the hearts of average Americans and the U.S. military complex."
China is farther along in its development of a new stealth fighter jet than
the U.S. had predicted, and that plane and other Chinese military advances
are worrisome, U.S. Defence Secretary Robert Gates said Saturday.
"They clearly have potential to put some of our capabilities at risk," Gates
said en route to military talks with Chinese leaders. "We have to pay
attention to them, we have to respond appropriately with our own programs."
The United States has long known that China wanted to field a stealth jet,
but development outpaced U.S. intelligence estimates, Gates said.