这个多重箭代码怎么改弹速？

不朽的龙骑士

(store_trigger_param_1,":var_1"),
(try_for_range,":var_2",1,12),      
  (agent_get_horse,":var_5",":var_1"),
  (agent_get_look_position,pos3,":var_1"),
  (agent_get_position,pos4,":var_1"),
  (718,4,3),
  (try_begin),
    (eq,":var_5",-1),
    (position_move_z,pos4,170),
  (else_try),
      (position_move_z,pos4,270),
  (try_end),
  (set_fixed_point_multiplier,100),
  (store_random_in_range,":var_3",-100,100),
  (738,4,9000),
  (739,4,":var_3"),
  (738,4,-9000),
  (store_random_in_range,":var_4",-100,100),
  (738,4,":var_4"),
  (1829,":var_1",4,5000,"itm_arbalest",0,"itm_mettenheim_bolts",0),
(try_end),
这个代码不管设定什么弓、弩，都只影响威力，并不能继承弹速，导致多重箭很快就坠落了，目测平射20米坠地，问问怎么修改能提升弹速？