Don't you mean "when" rather than "if"?
But we probably won't see Il-76s fitted with WS-20, it will only be for Y-20 at first and maybe eventually a militarised C919
Chinese Engine Development
- Thread starter jackbh
- Start date
Don't you mean "when" rather than "if"?
But we probably won't see Il-76s fitted with WS-20, it will only be for Y-20 at first and maybe eventually a militarised C919
Maybe he meant the testbed IL-76?
Wouldn't happen for the testbed I think. Rather unnecessary and defeats the point of a 4 engine testbed.
by78
General
I don't know, but judging from these two photos, WS-20's intake is noticeably larger. But again, it could be down to the angle at which these photos are taken.
PS-90 is on the left:
A collage of WS-20 photos:
This is the most similar angle of Il-476 with PS-90 that I found. I think the overall diameter of WS-20 is definitely wider than PS-90.
Fan blade diameter of PS-90 is listed as 1.9m on the manufacturer's website, while the standard D-30KP2 is listed at 1.455m
slide nine:
Hard to tell if the actual inlet/fan diameter of WS-20 is meaningfully bigger than PS-90, but it definitely isn't smaller I think
Fan blade diameter of PS-90 is listed as 1.9m on the manufacturer's website, while the standard D-30KP2 is listed at 1.455m
slide nine:
Hard to tell if the actual inlet/fan diameter of WS-20 is meaningfully bigger than PS-90, but it definitely isn't smaller I think
by78's picture is useful for guessing the diameter of WS-20, assuming we know D-30KP-2's fan diameter (1.455m).
Assuming the widest point of both WS-20 and D-30KP-2 corresponds proportionally to their fan diameter, then WS-20 is about 156% larger, so 2.26m in diameter at max. But by the looks of it WS-20's engine cowling is noticeably thicker than D-30's, so the real diameter is likely a little bit smaller.
Anyway, are we really that unaware of WS-20's intended thrust rating? I've seen 138 kN thrown around, but four of these are meant to power Y-20 with a MTOW of 220 tons and 66 tons of payload, and four PS-90A-76s at 157 kN power Il-476 with MTOW of 210 tons and 60 tons of payload, so 138 kN seems a bit low and something doesn't really add up.
Assuming the widest point of both WS-20 and D-30KP-2 corresponds proportionally to their fan diameter, then WS-20 is about 156% larger, so 2.26m in diameter at max. But by the looks of it WS-20's engine cowling is noticeably thicker than D-30's, so the real diameter is likely a little bit smaller.
Anyway, are we really that unaware of WS-20's intended thrust rating? I've seen 138 kN thrown around, but four of these are meant to power Y-20 with a MTOW of 220 tons and 66 tons of payload, and four PS-90A-76s at 157 kN power Il-476 with MTOW of 210 tons and 60 tons of payload, so 138 kN seems a bit low and something doesn't really add up.
I wouldn't trust the 138 kn figure. For a plane of that class, 160-ish kn engines seem more likely.
As for ps90a and ws20 inlet size - images don't allow an exact comparison. So far one can say they're comparable. ws20 may be a bit bigger, but it doesn't look like it's bigger by much. Certainly the thrust class of two engines is similar, which is understandable since planes are roughly comparable in mtow, give or take a few tens of tons.
As for ps90a and ws20 inlet size - images don't allow an exact comparison. So far one can say they're comparable. ws20 may be a bit bigger, but it doesn't look like it's bigger by much. Certainly the thrust class of two engines is similar, which is understandable since planes are roughly comparable in mtow, give or take a few tens of tons.
asif iqbal
Lieutenant General
Copy from aviation week around 2 years old though
@ asif, yes I'm aware that there are some charts supposedly displaying what the designations and various thrusts of Chinese engines are, however they're not always reliable. Certainly that one doesn't even mention WS-20 by name.
@Totoro, yes, I too would expect a 160 kN class thrust for WS-20 as well, but it is just very strange that there doesn't seem to be any consistent rumoured specs that has been agreed on..
@Totoro, yes, I too would expect a 160 kN class thrust for WS-20 as well, but it is just very strange that there doesn't seem to be any consistent rumoured specs that has been agreed on..
AeroEngineer
Junior Member
WS-20?
Boooyahhhhh !!!
Blackstone said it will be 20 years before WS-20 engine fly with Y-20.
Let's now see whats gonna happen next !