31. Thrust control was through throttle changes, which were too slow for acceptable height and roll control . 32. The Wright brothers designed their coordinated use of elevator, rudder and roll control for making effective turns. 33. This results in a large speed range and good handling characteristics in turbulence, without heavy roll control . 34. Bonney used differential sweep for roll control . 35. Aft of the trailing edge roll control . 36. The Blok-L upper stage lost roll control and failed to send the spacecraft on a lunar trajectory. 37. Roll control ( and attitude control during coast phases ) is provided by helium cold gas thrusters.38. It had a very high roll control . 39. The RS-27A main engine is neither restartable nor vernier engines to provide vehicle roll control during flight. 40. Most active roll control systems allow a small degree of roll to give a more natural feel.
