I worked for a drone start-up that focused on a drone in a box / dedicated landing pad type solution. Seeing the big names and well funded competitors not succeed validated the technical and regulatory challenges for me.
The biggest technical challenge by far was getting the drone to land back in the box reliably over 10's,100's,1000's of attempts. Other annoying issues included buggy open source flight controller firmware, motor bearings only rated for 50 hours of flight (industry has since improved), and attempting to recharge batteries in hot ambient temperatures.
The biggest technical challenge by far was getting the drone to land back in the box reliably over 10's,100's,1000's of attempts. Other annoying issues included buggy open source flight controller firmware, motor bearings only rated for 50 hours of flight (industry has since improved), and attempting to recharge batteries in hot ambient temperatures.