ROCKETRY TERMINOLOGY A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z           HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site payload ratio The ratio of the mass of useful payload of a rocket-propelled vehicle to the total launch mass of the vehicle. See rocket equation. Related category    • ROCKETRY TERMINOLOGY Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History BACK TO TOP