PPRuNe Forums - View Single Post - 737 max crosswind take-off roll. Question on rudder
Old 9th February 2012 | 08:56
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stilton
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'So now you're speaking highly about generating downforce, by killing lift with the spoiler, to keep the main gear forced into the ground, during the takeoff roll??? '


You may remember the reason we hold into wind Aileron on a crosswind take off is to prevent the upwind wing from lifting, when we do not want it to, both during the take off roll and subsequent rotation.



With stronger winds the Aileron deflection required will cause differential deflection of the flight spoilers on the upwind wing, this will kill some of the lift on this side, there is nothing wrong with this during the take off roll as we are not attempting to fly before VR at least we shouldn't be.





'The spoilers are killing lift where we do not want it? Where do we NOT want lift during the takeoff roll? '



On the upwind wing before and during rotation, basically we want less than too much !


Do you really want to fly before that point ?
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