Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_46801 ( "Engine type" text, "Scenario" text, "SFC in lb/(lbf\u00b7h)" real, "SFC in g/(kN\u00b7s)" real, "Specific impulse (s)" real, "Effective exhaust velocity (m/s)" real )

### Question ###
What is the average SFC in lb/(lbf h) for engines with an Effective exhaust velocity (m/s) larger than 29,553, and a SFC in g/(kN s) of 17.1?

### Accurate SQL ###

SELECT AVG("SFC in lb/(lbf\u00b7h)") FROM table_46801 WHERE "Effective exhaust velocity (m/s)" > '29,553' AND "SFC in g/(kN\u00b7s)" = '17.1'