Table 1 Basic concept variables and their definitions.
From: Research on safety assessment methods based on tasks for aircraft takeoff pitch attitude
Symbol | Variable name | Definition |
|---|---|---|
\(\:{t}_{vR1}\) | The 1st-second of lifting the nose wheel | The1st-second the nose wheel is lifted during the aircraft’s takeoff phase. |
\(\:{t}_{vR2}\) | The 2nd-second of lifting the nose wheel | The 2nd-second the nose wheel is lifted during the aircraft’s takeoff phase. |
\(\:{t}_{vR3}\) | The 3rd-second of lifting the nose wheel | The 3rd-second the nose wheel is lifted during the aircraft’s takeoff phase. |
\(\:{t}_{vR}\) | The process of lifting the nose wheel | The process of lifting the nose wheel to the main wheel in an aircraft. |
\(\:{t}_{vD}\) | The moment of the main wheel off the ground | Aircraft main wheel lift off time during takeoff phase. |
\(\:R\left({t}_{vR1}\right)\) | The rate of lifting the nose wheel in the 1st-second | The aircraft pitch angle changing rate on the first second of the lifting process of nose wheels. |
\(\:R\left({t}_{vR2}\right)\) | The rate of lifting the nose wheel in the 2nd-second | The aircraft pitch angle changing rate on the 2nd second of the lifting process of nose wheels. |
\(\:R\left({t}_{vR3}\right)\) | The rate of lifting the nose wheel in the 3rd-second | The aircraft pitch angle changing rate on the third second of the lifting process of nose wheels. |
\(\:R\left({t}_{vR}\right)\) | The rate of lifting the nose wheel | The aircraft pitch angle changing rate in the lifting process of nose wheels. |
\(\:P\left({t}_{vD}\right)\) | Takeoff pitch angle | The angle between the x-axis of the aircraft-body coordinates frame and the horizontal plane. |
