CREATE TABLE "table1_13605170_2" (
  "aircraft_type" text,
  "national_origin" text,
  "1st_flight" real,
  "in_service" text,
  "retired" text,
  "num_built" text
);

Question: how many Curtiss XBTC aircraft are retired?
SQL: SELECT COUNT("retired") FROM "table1_13605170_2" WHERE "aircraft_type"='Curtiss XBTC';

Question: How many Airspeed Fleet Shadower aircraft are retired?
SQL: SELECT "retired" FROM "table1_13605170_2" WHERE "aircraft_type"='Airspeed Fleet Shadower';

Question: What is the origin of aircraft in service in 1943 and retired in 1954?
SQL: SELECT "national_origin" FROM "table1_13605170_2" WHERE "retired"='1954' AND "in_service"='1943';