Menu
Home
People
Places
Arts
History
Plants & Animals
Science
Life & Culture
Technology
Reference.org
Roll program
open-in-new
<p>A roll program or tilt maneuver is an <a href="/facts/Flight_dynamics/YovEIsxu">aerodynamic maneuver</a> that alters the <a href="/facts/Attitude_dynamics_and_control/hE6aMu26">attitude</a> of a vertically launched <a href="/facts/Launch_vehicle/g1GCGFJB">space launch vehicle</a>. It consists of a partial rotation around the vehicle's vertical axis, allowing the vehicle to then <a href="/facts/Gravity_turn/BXXg8alV">pitch</a> to follow the proper azimuth toward orbit. </p><p>A roll program is usually completed after the vehicle clears the <a href="/facts/Service_structure/Q3LKfGk6">tower</a>. In the case of many NASA crewed launches, the commander reports the roll to the <a href="/facts/Mission_control_center/RvXSH1AI">mission control center</a> which is then acknowledged by the <a href="/facts/Capsule_communicator/qu44PG1U">capsule communicator</a>. </p>