One of the reasons that we're still not seeing delivery drones in common use lies in the fact that they can only fly for about half an hour per battery-charge. According to a new study, though, their range could be extended if they hitched rides on top of buses.
Led by associate professors Mykel Kochenderfer and Marco Pavone, a team at Stanford University started by creating computer models in which drones were making deliveries in North San Francisco and Washington, DC. These models incorporated the existing public bus networks, with up to 200 drones per city delivering as many as 5,000 packages.
Each aircraft started out at a depot, where a package was loaded onto it. If its destination was within battery range of the depot, the drone could fly directly to and from that location. If it was farther, though, the drone flew to a bus stop where it landed on top of a bus that covered much of the distance. Once the bus reached a stop within range of the destination, the drone flew off to it.
Because there was more than one depot in each city, any one drone could either return to its originating depot, or travel on to a different one where another package was waiting for it. With this in mind, the model determined which drones should make which deliveries, and in what order. In all cases, the system was aimed at minimizing the amount of time that each delivery took.
As a result, the longest delivery time in North San Francisco was under an hour, while it was less than two hours in Washington. Additionally, in both cities, the drones were able to quadruple their effective flight range.
"Delivery drones are the future," says Kochenderfer. "By using ground transit judiciously, drones have the potential to provide safe, clean and cost-effective transport."
A somewhat similar system has been proposed by several companies – including Mercedes, HorseFly and Workhorse – in which delivery drones would hitch rides on top of delivery vans.
Source: Stanford University via EurekAlert
Firstly, 'hitching a ride' means the Drone has to have a means of reliably locating, landing, attaching and detaching from the Bus (presumably on the roof) without causing damage to the Bus or any surroundings such as suspended cables etc.
Secondly, no matter the siz/weight of the Drone it still impacts on the Fuel costs of the Bus owner - this may seem 'trivial' to some but think of it as your business and your fuel costs etc.
As a bus Operator there are also clear legal issues here regarding damage etc. If a Drone has landed on the roof of a vehicle (bus, Truck, Van etc) then the Height restrictions applying to the vehicle may indeed be violated. If the Dirver is not aware that a Drone has landed and attached to the roof then they have no way of knowing if they are going to cause potential damage to cabling, constructions during its journey.
If the vehicle travels under a height restriction that causes damage ot the Drone then the Drone Owner is likely to try and sue the Driver/vehicle owner. I for one would NEVER allow a Drone to 'piggyback' on my vehicle for this and many other reasons.
Most importantly, no body (Driver, vehicle owner, passengers etc) have any idea WHAT any Drone is carrying. It could be transferring Drugs, contraband etc that the Delivery firm is not aware of.
Worse of all - Terrorists could use this 'mechanism' to land a 'false drone (packed with explosives) onto the roof of a vehicle.
I for one would NEVER feel safe on hearing a Drone attach or be flying anywhere near a vehicle I was driving or a passenger in.
It is absurd, dangerous and naive to think that this proposed 'mechanism' is worth the risks to owners, passengers etc.
I look forward to a future where every part of the world is working together, instead of in tension.
Seeing autonomous ‘carts’ in Milton Keynes(UK) is just the stepping stone
This was a model to see if it could work. Obviously a business wouldn't start landing on buses illegally or without permission as part of a successful business model. If this pans out, I am quite sure it would follow a contract that stipulated payment to the bus company or municipal department, insurance, it would consider height restrictions, etc.
Commercial airlines already carry packages on passenger flights all the time. Having a delivery drone land on a bus would be at no more of a terrorism risk than the parcels that already get transported in planes.