CREATE TABLE table_24796 ("Pilot" TEXT, "Organization" TEXT, "Total Flights" FLOAT, "USAF space flights" FLOAT, "FAI space flights" FLOAT, "Max Mach" TEXT, "Max speed  ( mph ) " FLOAT, "Max altitude  ( miles ) " TEXT)

What was the max mach when the maximum speed was 3887?
SELECT "Max Mach" FROM table_24796 WHERE "Max speed (mph)" = '3887'
SELECT "Max Mach" FROM "table_24796" WHERE "Max speed (mph)" = '3887'