A few nice best drone pictures images I found:
Birds-eye view of Tunbridge Wells
Image by robkingcameraman
An aerial view of The Pantiles in Tunbridge Wells
Drone with motor-generator
Image by serge_alekseenko
Electric generator. The stator is made of non-magnetic material.
The best version of the stator core.
Stainless steel with no magnetic properties.
Softwares: STEP / IGES