For our very specific business application we are looking for a drone with the following features.

• Flying without GPS
• Fully programmable via SDK
• Space to mount custom Hardware
• We have to climb through different little holes (diameter min. 400mm). So it would be nice, if the drone is foldable?
• We need to fly through pipes with diameter 0.75m*
• Flight time not more than 25 minutes
• Distance between operator and Drone max. 15m
• Easy to transport
• Nice to have: camera mount on top of drone
  

*The biggest problem is, that this pipes have a sensible coating and we have to prevent any form of damages.

Is there a drone, which fulfill our requirements? We really want to use DJI because of the customization through SDK.
The matrice 100 is looking good, but regarding to the diagonal wheelspace of 650mm, this is way too risky for our pipes.
Any advice would be really helpful.

BR Chris

Wow, I doubt any of the current DJI customer drones apply to those requirements.