China's transport, tanker & heavy lift aircraft
- Thread starter Totoro
- Start date
Just magnificent !
I have been waiting for over 9 years for this !
WS-20 engine is the finial finishing grace for this beauty!
kwaigonegin
Colonel
It would be a significant milestone in Chinese aviation accomplishments when both the ws15 and ws20 enter full blown serial production.
The WS-20 probably did already. We saw the Y-20B in PLAAF colors.
Will there ever be any Y-20 painted in a similar scheme to that of the Il-76 or it is more likely the Il-76 will be repainted in the same color as the Y-20 instead?.
IMO we see more likely them continuing using their regular scheme until they are being retired.
I see. The Il-76's color scheme is gorgeous and would have looked great on the Y-20 but alas.
For anyone who still remember the Y-20 2.5G destructive test and wing breaking at 120%. I just watched a video of an airline pilot talking about Boeing-777X development.
At about 15:58, he said that the wing broke at 148% (goal being 150%, 2.5G ) of its limit load (aka ultimate load), the limit load is the maximum load that the aircraft can legally experience.
This means that there are two load limits: limit load(ultimate load) and maximum operational load. Limit load is the goal (breaking point) of the 2.5G destructive test. Maximum operational load is the design specification that aircraft is allowed to pull many Gs in operation. So the final goal of 2.5G destructive test is 150% of the maximum operational load. The breaking at 120% is in reference of this 150%, in the middle of reaching 150%.
In case of Boeiing-777X, reaching 148% is deemed good enough not to necessitate a further test but with stated fixing measures. For Y-20 at 120%, I would assume further test was done untill reaching 150% (2.5G), as the engineer said in the video "this time we aim at 120%".
Regarding the CCTV report, I don't think the reporter made any mistake, it is just that the relationship of the professional terms were not presented (not that they should after all it isn't a lecture).
This means that there are two load limits: limit load(ultimate load) and maximum operational load. Limit load is the goal (breaking point) of the 2.5G destructive test. Maximum operational load is the design specification that aircraft is allowed to pull many Gs in operation. So the final goal of 2.5G destructive test is 150% of the maximum operational load. The breaking at 120% is in reference of this 150%, in the middle of reaching 150%.
In case of Boeiing-777X, reaching 148% is deemed good enough not to necessitate a further test but with stated fixing measures. For Y-20 at 120%, I would assume further test was done untill reaching 150% (2.5G), as the engineer said in the video "this time we aim at 120%".
Regarding the CCTV report, I don't think the reporter made any mistake, it is just that the relationship of the professional terms were not presented (not that they should after all it isn't a lecture).
Last edited:
Correction:
I was wrong in quoting "148% (goal being 150%, 2.5G ) of its limit load".
It should have been "the wing broke at 148% (goal being 150%) of its maximum load that the aircraft can legally experience". This 150% of maximum legal load is the limit load.
The rest of the post is correct. So the conclusion remains.