PPRuNe Forums - View Single Post - E-Fan X: R-R/Airbus electric drive demonstrator
Old 30th Nov 2017, 00:23
  #16 (permalink)  
Join Date: Mar 2015
Location: antipodies
Posts: 64
you are referring to a later post where the value is estimated as 90megawatt for 10 minutes .... exactly the point I was making! not that i agree with that estimation, the get off the ground value will be significantly greater than the climb away value.

But there are several other possible gains
1 fan speed can be optimum without gears
2 contra rotating fans also can be achieved very simply without gears
3 and finally for getting off the ground "ludicrous" amount of power available for short bursts and this power is instantly available without any turbine lag which is a good thing for a go around.
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