Study on the Mechanism of Sparks Generated Mechanical Friction

Table 2

Calculation of the flight trajectory TC4 sparks.

Rotate speed (m/s)	a1 (m·s^−2)	a2 (m·s^−2)	a3 (m·s^−2)	a4 (m·s^−2)	a5 (m·s^−2)	a6 (m·s^−2)	a7 (m·s^−2)	a8 (m·s^−2)	a9 (m·s^−2)
31.4	300	300	300	200	200	200	200	200	200
	400	400	400	400	200	—	—	—	—
	400	200	200	400	400	200	200	200	—
41.9	600	400	400	400	400	200	200	—	—
	600	400	400	400	200	200	200	-	-
	800	400	400	400	200	—	—	—	—
52.3	3000	1000	1000	600	400	400	400	200	200
	1200	1000	600	400	400	400	400	—	—
	1200	1000	800	600	400	400	400	—	—
62.8	1000	800	600	600	400	200	200	200	—
	1200	800	1000	400	400	200	200	200	—
	1800	1000	1000	600	600	400	400	—	—
73.2	1000	600	200	200	200	200	200	—	—
	1200	1000	600	400	400	400	-	—	—
	1400	1000	800	600	400	600	200	—	—