RR Ultrafan engine

[Let'sgoflying!]

Worlds largest
Composite blades
110,000 lbs thrust
Stuff about sustainable fuelshttps://www.rolls-royce.com/media/p...build-complete-and-getting-ready-to-test.aspx
https://www.rolls-royce.com/media/p...build-complete-and-getting-ready-to-test.aspx
https://www.rolls-royce.com/media/press-releases/2022/19-12-2022-rr-ultrafan-technology-demonstrator-build-complete-and-getting-ready-to-test.aspx

 

[bbchien]

Trent was a failure……this one is 12 feet across…..!!

 

[RudyP]

Trent was a failure……this one is 12 feet across…..!!

Why do you say the Trent series was a failure? According to Wikipedia it is a success:
First run in August 1990 as the model Trent 700, the Trent has achieved significant commercial success, having been selected as the launch engine for all three of the 787 variants (Trent 1000), the A380 (Trent 900) and the A350 (Trent XWB). Its overall share of the markets in which it competes is around 40%.[36] Sales of the Trent family of engines have made Rolls-Royce the second biggest supplier of large civil turbofans after General Electric,[37] relegating rival Pratt & Whitney to third position. By June 2019, the Trent family had completed over 125 million hours.[38]

 

[Bell206]

Why do you say the Trent series was a failure?

Several Trent series had various long-term, high-profile reliability issues that brought a lot of negative input on them. Most had to do with some sort of fatigue cracking. I believe one series fix required the replacement of all in-service engines.

 

[RudyP]

Gotcha. Didn’t know that.