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DLR HAP-alpha | Airframer | DLR - German Aerospace Center

05/12/2025

Press Release:
HAP-alpha on the launch trolley: After the aircraft was rolled out of the hangar, it was mounted on its launch trolley and attached to a tow vehicle for the first time. When stationary, the wing must be supported by the trolley's 'outriggers' – as there is no aerodynamic lift to relieve the load on the aircraft's ultra-light structure.

HAP-alpha on the launch trolley: After the aircraft was rolled out of the hangar, it was mounted on its launch trolley and attached to a tow vehicle for the first time. When stationary, the wing must be supported by the trolley's 'outriggers' – as there is no aerodynamic lift to relieve the load on the aircraft's ultra-light structure.

DLR conducts ground roll tests with HAP-alpha – the uncrewed high-altitude solar aircraft

24/07/2025

News:

HAP-alpha will fly at around 20 kilometres in the lower stratosphere.

DLR completes vibration test for solar HAP-alpha aircraft

The stratospheric platform project has passed vibration testing in Cochstedt as DLR now works towards future sensor trials and 2026 flight readiness.

21/04/2021

Press Release:
Lightweight construction of HAP Alpha. (Photo: DLR)

DLR develops an unmanned stratospheric aircraft