The DHL Paketkopter research project has been continued in 2015. The choice fell on a strongly modified tiltwing which fulfils its tasks successfully and reliably.

The task:

Continuation of the DHL Paketkopter 3.0 project in springtime 2015 resulted in novel challenges referring to concept revision. Differing from predecessor projects the Paketkopter 3.0 was meant to overcome longer horizontal distances of 8km as well as elevation differences of 0.5km. Besides, the target was to transport an increased payload of 2kg. Due to these requirements we reverted to a collaborative tiltwing project with the FSD chair of the RWTH Aachen. That is why a fixed wing aircraft becomes part of such project for the very first time.

Challenges:

Essential points to revise were mechanical fitting of the aircraft and landing skid to the automatic loading and unloading concept of DHL. At the same time it had to meet the immensely increased requirements referring to lightweight construction. For compensation of the additional weight of the payload container with fully integrated battery we consecutively choose vacuum infusion CFRP components as well as the latest hybrid bonding technology.

Implementation:

The newly developed permanent magnet BLDC motors by Schübeler Composite allow for emission-free and extraordinarily quiet operation. The motors are completely encapsulated, passively cooled and enable operation at all weather conditions. In collaboration with CFD and wind tunnel optimised 700mm propellers the electric propulsion faciliates broadband energy efficiency levels leading to a reduced consumption of energy at take off and landing as well as in horizontal flight. The aerial vehicle has a maximum take-off mass of 14kg including the 2kg payload and a wing span of 2000mm. The tailor-made lightweight components manufactured in our ISO 9001:2008 certified production provide failsafe fully automatic operation between the two skyports in Reit im Winkl and Winkelmoosalm.

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