Vladex wrote:No , it doesn't fit 787 and just barely A350 but only 19" ground clearance .
Ultrafan will sit closer to the wing.
The exhaust from the XWB is more than 2 feet below the lower surface of the wing. Most of the extra diameter of Ultrafan will go upwards without much issue at all. The bottom of the nacelle can still remain circular. The engine exhaust and top edge of the nacelle will be closer to the wing but a safe distance like the 737NG.
Airbus will not have to resort to doing what Boeing did on the 737MAX and moving the engine forward and upwards.
Baldr wrote:As reported by Guy Norris in the Feb. 8-21 (page 19) edition of AW&ST, the UltraFan demonstrator engine will have a 15:1-bypass-ratio fan and it will be rated at 87,000 lb thrust -- and not a 13:1 bypass ratio and a thrust of 97,000 lbf, as you seem to believe.
All the reports have been "up to 15:1" bypass ratio.
It would be impossible to fit a 15:1 bypass ratio engine under the A350-1000 and hit 97,000lb of thrust. So Airbus would need to produce two engines with the same fan diameter. A 13:1 bypass ratio engine with 97,000lb of thrust for the A350-1000 and a 15:1 bypass ratio engine with 84,000lb of the thrust for the A350-900.
I could see them derating the 13:1 bypass ratio engine for the A350-900.