Forward pressure on take off & Downwash
Hello everyone ,
I'm new to this forum and would like some insights on these two questions that I've been having trouble finding answers for. My questions are specific to the aircraft that I fly currently, a boeing.
1. Light forward pressure is required on control column during take off till 80kts. I understand that it's to increase nose wheel effectiveness. What could be the implications or adverse effects of maintaining this pressure till rotation ? Something to do with control surface deflection and the drag generated because of that ?
2. After rotation ,passing 10 degrees of pitch attitude, extra backward pressure is required to continue rotation to the target pitch attitude. Someone told me that it's beacsue fo a phenomenon known as Downwash. Could someone here please she's some light on it.
Thanks a lot in advance.