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Rottmann, Lukas and Paintner, Rafael and Müller, Daniel and Hunold, Julian (2025) Inflight Measurements of the Empennage of an Ultralight Coaxial Helicopter. In: 81st Annual Vertical Flight Society Forum and Technology Display, FORUM 2025, 81. Vertical Flight Society. 81st Annual Forum & Test and Evaluation, 2025-05-20 - 2025-05-22, Virginia Beach, VA. doi: 10.4050/F-0081-2025-0246.
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Abstract
The empennage of a helicopter is largely responsible for its stability in forward flight. Its performance is mainly determined by its aerodynamics. In this paper, the empennage of a CoAX 2D ultralight research helicopter is analyzed in detail. For this purpose, the helicopter was equipped with flow measurement devices and flight tests were performed, covering different flight conditions. Measurements from a nose boom as well as the pilot’s control inputs and helicopter’s position are available for evaluation. For the empennage in particular, seven-hole flow probes were mounted on it and various cameras were used to record the movement of the surface tufts.
| Item URL in elib: | https://elib.dlr.de/220789/ | ||||||||||||||||||||
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| Document Type: | Conference or Workshop Item (Speech) | ||||||||||||||||||||
| Title: | Inflight Measurements of the Empennage of an Ultralight Coaxial Helicopter | ||||||||||||||||||||
| Authors: |
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| Date: | May 2025 | ||||||||||||||||||||
| Journal or Publication Title: | 81st Annual Vertical Flight Society Forum and Technology Display, FORUM 2025 | ||||||||||||||||||||
| Refereed publication: | Yes | ||||||||||||||||||||
| Open Access: | No | ||||||||||||||||||||
| Gold Open Access: | No | ||||||||||||||||||||
| In SCOPUS: | Yes | ||||||||||||||||||||
| In ISI Web of Science: | No | ||||||||||||||||||||
| Volume: | 81 | ||||||||||||||||||||
| DOI: | 10.4050/F-0081-2025-0246 | ||||||||||||||||||||
| Publisher: | Vertical Flight Society | ||||||||||||||||||||
| Status: | Published | ||||||||||||||||||||
| Keywords: | Inflight measurements, CoAX 2D, flow measurement, ultralight helicopter, empennage | ||||||||||||||||||||
| Event Title: | 81st Annual Forum & Test and Evaluation | ||||||||||||||||||||
| Event Location: | Virginia Beach, VA | ||||||||||||||||||||
| Event Type: | international Conference | ||||||||||||||||||||
| Event Start Date: | 20 May 2025 | ||||||||||||||||||||
| Event End Date: | 22 May 2025 | ||||||||||||||||||||
| Organizer: | Vertical Flicht Society | ||||||||||||||||||||
| HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||||||
| HGF - Program: | Aeronautics | ||||||||||||||||||||
| HGF - Program Themes: | Efficient Vehicle | ||||||||||||||||||||
| DLR - Research area: | Aeronautics | ||||||||||||||||||||
| DLR - Program: | L EV - Efficient Vehicle | ||||||||||||||||||||
| DLR - Research theme (Project): | L - Virtual Rotorcraft and Validation | ||||||||||||||||||||
| Location: | Braunschweig | ||||||||||||||||||||
| Institutes and Institutions: | Institute for Aerodynamics and Flow Technology > Helicopter, BS Institute of Flight Systems > Rotorcraft | ||||||||||||||||||||
| Deposited By: | Rottmann, Lukas | ||||||||||||||||||||
| Deposited On: | 16 Dec 2025 13:43 | ||||||||||||||||||||
| Last Modified: | 25 Feb 2026 14:40 |
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