ED Team Yo-Yo Posted December 17, 2022 ED Team Posted December 17, 2022 3 hours ago, maajr57 said: Thx for the post. The issue and discussion was really about lifting the tail for a 2 wheel takeoff and the the yaw to the right and nosedive prop strike I was getting. Best advice was from Kablamoman who said to minimize left rudder and focus on the attitude of the plane to raise the tail. Light right rudder down the runway with a little short kick when the tail comes up. Still not convinced the prop strike is realistic with rudder alone but at least it won't happen to me anymore. Art-J also deserves a mention for correcting me about yaw direction when the tail comes up. Pulls to left, not right. If you suffer from right yaw (yes, yaw to right causes nose down moment due to gyroscopic effect) there is only one reason of it - your rudder input is too high for 2 wheel attitude. The anticipated rudder work is: necessary portion of right rudder as the plane IS MOVING to 2-wheels position to compensate gyro effect (generally speaking, it depends on how fast you rotate the plane, do not do it too aggressive, especially as you start to train takeoff) then, as the plane is at 2-points attitude, you need less right rudder comparing to 3-points. That's the point. If you even try to keep it - the plane will go right. So, you need to anticipate two moments when the plane behavior changes - at the rotation and after it. But the best advice is: do not react to the yaw - react to the yaw tendencies. Do not try to hold direction, first of all you need to stop angular velocity and only after the plane is straight you can gently correct the direction if necessary. As you see in the video, feet were dancing all the way keeping the plane straight. Ніщо так сильно не ранить мозок, як уламки скла від розбитих рожевих окулярів There is nothing so hurtful for the brain as splinters of broken rose-coloured spectacles. Ничто так сильно не ранит мозг, как осколки стекла от разбитых розовых очков (С) Me
maajr57 Posted December 17, 2022 Author Posted December 17, 2022 8 minutes ago, Yo-Yo said: If you suffer from right yaw (yes, yaw to right causes nose down moment due to gyroscopic effect) there is only one reason of it - your rudder input is too high for 2 wheel attitude. The anticipated rudder work is: necessary portion of right rudder as the plane IS MOVING to 2-wheels position to compensate gyro effect (generally speaking, it depends on how fast you rotate the plane, do not do it too aggressive, especially as you start to train takeoff) then, as the plane is at 2-points attitude, you need less right rudder comparing to 3-points. That's the point. If you even try to keep it - the plane will go right. So, you need to anticipate two moments when the plane behavior changes - at the rotation and after it. But the best advice is: do not react to the yaw - react to the yaw tendencies. Do not try to hold direction, first of all you need to stop angular velocity and only after the plane is straight you can gently correct the direction if necessary. As you see in the video, feet were dancing all the way keeping the plane straight. Thx for the thoughtful reply and explanation. My technique is improving thanks to a lot of help from my friends!
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