What is the maximum foot per second speed where time to feet ratio is 22.1 at 55 degrees?
CREATE TABLE "table1_16439764_1" (
  "gun" text,
  "m_v_ft_s" real,
  "shell_lb" text,
  "time_to_ft_m_at_25_seconds" text,
  "time_to_ft_m_at_40_seconds" text,
  "time_to_ft_m_at_55_seconds" text,
  "max_height_ft" real
);
SELECT MAX("m_v_ft_s") FROM "table1_16439764_1" WHERE "time_to_ft_m_at_55_seconds"='22.1';