Rans N512DT Text Manual page 162

RANS S-21 OUTBOUND TEXT MANUAL 161
An example of using bump trim on the ailerons.
Place trim on the bottom of ailerons for best results.
Summary
Take your time on post flight rigging; the end result will be a plane that flies in perfect
trim. This will enhance performance and flying qualities. Remember, change one thing
at a time and carefully note cause and effect.
09/11/2018