Chinese Aviation Industry
- Thread starter FriedRiceNSpice
- Start date
Skywatcher
Captain
I'd be extremely surprised if you did that with a prototype instead of a dedicated test unit.
SamuraiBlue
Captain
Yes but they were all symmetrical in one of the two axis with an even number of blades. You can't obtain this with a five blade.
vesicles
Colonel
That's why I think what is in those photos was some foreign object not even attached to the chopper.
In the link attached they were experiment various uneven spacings with 5 blade, and comparing them to even spacings of 4 blade and 5 blade.
I'm not suggesting that that is what they are doing, just saying that people do test blades with non-uniform spacings.
ed: btw it could just be a Mi-8
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TerraN_EmpirE
Tyrant King
Still part of the hip family of helicopters. I pin it to the latter series because of the placement of the "windows"
From Jeff's post #973 in the, quite reasonably closed, thread 'Chinese purchase of Su-35'.
I would like to add that their own design took account of the production methods and bought in parts available to them. When Fairchild-Hiller produced the Fokker F-27 Friendship under licence they had to consider the Aluminum alloy sheet locally available and the fact that Fokker used metric measure while they were used to the measuring system derived from the Roman Empire as well as a host of other matters. The result was that none of the aircraft spare parts for both versions of the Friendship were the same.
The same when Tupolev "copied" the Boeing B-29 and produced the Tu-4. Sheet thickness is different so when it is less you have to add to strength and stiffness of the supporting structure, if it is more you want to reduce the weight of that structure. Engines are different, norms for hydraulic systems are different, etc, etc, ect.
China presumably invested in new production methods for J-11 that resulted in a lighter and cheaper aircraft then one built from parts imported from Russia, thus the change from J-11A to -B.
In short when "stealing" the design of an aircraft you have still to do nearly as much as when you design one and sometimes even more.
I would like to add that their own design took account of the production methods and bought in parts available to them. When Fairchild-Hiller produced the Fokker F-27 Friendship under licence they had to consider the Aluminum alloy sheet locally available and the fact that Fokker used metric measure while they were used to the measuring system derived from the Roman Empire as well as a host of other matters. The result was that none of the aircraft spare parts for both versions of the Friendship were the same.
The same when Tupolev "copied" the Boeing B-29 and produced the Tu-4. Sheet thickness is different so when it is less you have to add to strength and stiffness of the supporting structure, if it is more you want to reduce the weight of that structure. Engines are different, norms for hydraulic systems are different, etc, etc, ect.
China presumably invested in new production methods for J-11 that resulted in a lighter and cheaper aircraft then one built from parts imported from Russia, thus the change from J-11A to -B.
In short when "stealing" the design of an aircraft you have still to do nearly as much as when you design one and sometimes even more.
asif iqbal
Lieutenant General
Good news for ARJ-21
Flight international page 10 October Issue
Flight international page 10 October Issue
Equation
Lieutenant General
Good news for ARJ-21
Flight international page 10 October Issue
Oh no way?! That's great news! So I guess the ARJ-21 passed all major testings than.