Atmospheric thruster
From Space Engineers Wiki
The Atmospheric thruster is a new kind of thruster with the sole purpose of functioning in an atmosphere of a planet. It looks exactly like a jet engine(turbine) and needs Hydrogen to function. As of the current (development) version, the fan blades don't spin (yet). They emit a white exhaust when functioning. It is said that they will be easy to produce, because they will be your main form of transportation on a planet(alongside other options such as rovers). The thrusters come in 2 sizes for both large and small grids.
Source: video/audio footage from the 23/10/15 dev twitch stream at Keencommunitynetwork(KCN) channel.
Note: picture needed(from the stream anyone?)