This is referred to as aerodynamic braking
. The raised elevator causes a negative aerodynamic load on the tail, which has the effect of increasing the airplane's weight and, therefore, braking effectiveness.
After that, the engineers' next objective is to construct a system of aerodynamic braking
that in the future will help to bring Mayak and other satellites to Earth without having to use an engine to pass back through the Earth's atmosphere.
Among specific topics are evaluating the performance of a photovoltaic system in humid atmosphere, analyzing a wind turbine aerodynamic braking
system using chord wise spacing, the effect of swirl on the performance of an annular diffuser, mitigating wear in cast magnesium alloy through friction-stir surface compositing reinforced with fly ash, and the influence of engine speed on mixing and emission characteristics of multiple-injection common rail direct injection diesel engine.
The satellite seems to be rolling as it tumbles, which over the course of time will slow down due to aerodynamic braking
. Greg was not aware of any amateur observations of Cosmos 2251.
For instance, the pneumatic system can provide aerodynamic braking
to assist the normal air brakes by quickly turning the trailer from a low-drag configuration into a high-drag configuration to provide much more braking power.