Roll rate
The roll rate is the amount per unit of time in which the aircraft can roll around its longitudinal axis . Usually the roll rate is given in degrees per second, very rarely in rad / s.
Aircraft with good lateral stability have a low roll rate. In the case of commercial aircraft, a stable, safe straight flight is desired, which can be restored after an aerodynamic disturbance even without the pilot's intervention. Longitudinal stability is of subordinate importance for combat aircraft and aerobatic aircraft . They are constructed in such a way that they have good maneuverability, i.e., among other things, can change their bank angle as quickly as possible. Aerobatic planes have a high roll rate. The ailerons of the Fiat G.91 are relatively large to enable good maneuverability and a high roll rate. Short wings (small wingspan) reduce the inertial mass and also favor a high roll rate.
Roll rates of some planes
- Jakowlew Jak-55 : 330 ° / s
- Jakowlew Jak-55 M: 420 ° / s
- Suchoi Su-26 M: 360 ° / s
- Zivko Edge 540 : 420 ° / s
- Cap 232 : 420 ° / s,
- Pitts Special S 1 S: 180 ° / s
- Extra 300 : 380 ° / s
- Extra 200 : 400 ° / s
- Dassault Mirage 2000 : 270 ° / s