[nradov]

That's just silly and completely unrealistic. We already have helicopter ambulances. They work, but have a relatively high accident rate due to being called to fly frequently in bad weather and near obstructions (trees, power lines). The FAA and crew members won't tolerate something that's even more dangerous for domestic civilian use.

There are no such thing as predefined flight paths that are known to be safe, at least not in the areas where air ambulances have to operate. There is always a risk of collision with other aircraft operating under VFR. And a human pilot is always needed to cope with in-flight emergencies that autopilots can't handle.

There could be a limited use case for military casualty evacuation drones. The military is researching those for use in combat zones where sending a manned helicopter would be too risky.

https://taskandpurpose.com/gear-tech/army-drone-helicopter-m...