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Description
“design, fabricate, and demonstrate the flight capabilities of an unmanned, electric powered, radio controlled aircraft”
- Organised by AIAA (American Institute of Aeronautics and Astronautics)
- >100 internationale Teams
- New ruleset every year
Tucson, Arizona, USA
13. - 16.04.2024
Kontakt unter
dbf@addi.rwth-aachen.de
Was ist der DBF?
Der DBF (Design, Build and Fly) ist der weltweit größte Wettbewerb für das Entwickeln, Bauen und Fliegen eines unbemannten Flugzeugs. Der von dem American Institute of Aeronautics (AIAA) organisierte Wettbewerb gibt interdisziplinären Studententeams die Herausforderung, ein unbemanntes, elektrisch angetriebenes Flugzeug zu entwickeln, das jährlich ändernde Missionsanforderungen erfüllen muss.
What were the Missions? How were points awarded?
The basic rule was that the entire aircraft had to fit into an airline checked bag and the battery must not have more than 100Wh of energy; also in accordance with the airline guidelines. Furthermore, the maximum current was limited by a 100A fuse. In addition, 2 identical pairs of wings have to be produced, with a coin toss on each side deciding which wing is to be used.
Missionen
Mission 1: Proving flight
In the first mission, the aircraft must be ready to fly from the transport box within 5 minutes. within 5 minutes. The aircraft must be able to take off on a 20 metre runway and complete three laps within 5 minutes. This time window begins when the aircraft takes off for the first time. aircraft takes off.
Mission 2: Survailance flight
In the next mission, the aeroplane must be removed from the transport box and made ready to fly within 5 minutes. ready for flight within 5 minutes. This time, a payload in the form of an ‘electronics package’ with a se minimum size is installed in the aircraft. The aim is to fly as many laps as possible within 10 minutes to fly as many laps as possible with the largest possible payload. The payload must make up at least 30% of the total weight.
Mission 3: Flight with antenna (3 rounds)
In the final mission, the stability of the aircraft is tested with the help of an ‘antenna of the wing, in the form of a PVC pipe. The aeroplane, including this antenna aerial must fly three laps as quickly as possible.
Ground Mission: Static load test
One fitter and one pilot from each team compete in the ground mission. The aim is to within a time window of 10 minutes and to attach the maximum load that the aircraft can that the aircraft can withstand in a static case. Meanwhile, the pilot checks whether all flight controls are working. Once the load has been attached, a holding phase of 30 seconds must be seconds must be endured. If signs of failure or deformation occur during this time occur during this time, the test is deemed invalid. After this holding phase, the pilot tests all flight controls again flight controls for functionality.
In the first mission, the aircraft must be ready to fly from the transport box within 5 minutes. within 5 minutes. The aircraft must be able to take off on a 20 metre runway and complete three laps within 5 minutes. This time window begins when the aircraft takes off for the first time. aircraft takes off.
Mission 2: Survailance flight
In the next mission, the aeroplane must be removed from the transport box and made ready to fly within 5 minutes. ready for flight within 5 minutes. This time, a payload in the form of an ‘electronics package’ with a se minimum size is installed in the aircraft. The aim is to fly as many laps as possible within 10 minutes to fly as many laps as possible with the largest possible payload. The payload must make up at least 30% of the total weight.
Mission 3: Flight with antenna (3 rounds)
In the final mission, the stability of the aircraft is tested with the help of an ‘antenna of the wing, in the form of a PVC pipe. The aeroplane, including this antenna aerial must fly three laps as quickly as possible.
Ground Mission: Static load test
One fitter and one pilot from each team compete in the ground mission. The aim is to within a time window of 10 minutes and to attach the maximum load that the aircraft can that the aircraft can withstand in a static case. Meanwhile, the pilot checks whether all flight controls are working. Once the load has been attached, a holding phase of 30 seconds must be seconds must be endured. If signs of failure or deformation occur during this time occur during this time, the test is deemed invalid. After this holding phase, the pilot tests all flight controls again flight controls for functionality.
Technical specifications
Empty weight: 6,5kg
Wingspan: ~2,2m
Motors: 3,5kW Kontronik Pyro 850-40 L Competition
Motor controller: Kontronik Cool KOSMIK 170 HV-I
Battery: SLS 6s 4500mAh für Mission 1 und 2, SLS 8s 3000mAh für Mission 3
Propeller: Mission 1 und 2: APC 21x12E; Mission 3: APC 17×14
Max. thrust: Mission 1 und 2: 90N; Mission 3: 100N
Wingspan: ~2,2m
Motors: 3,5kW Kontronik Pyro 850-40 L Competition
Motor controller: Kontronik Cool KOSMIK 170 HV-I
Battery: SLS 6s 4500mAh für Mission 1 und 2, SLS 8s 3000mAh für Mission 3
Propeller: Mission 1 und 2: APC 21x12E; Mission 3: APC 17×14
Max. thrust: Mission 1 und 2: 90N; Mission 3: 100N
Results
We started with the ground mission, in which we applied a very impressive load of 344 kilograms to the centre
impressive 344 kilograms on the centre 20% of the wing. The test was passed
Hugo 5 passed the test without any problems thanks to its negative V position of the wings (a bridge is formed),
so that it could continue directly with the dynamic disciplines.
Once Mission 1 had proven its flying skills, it was on to Mission 2.
than all the competitors (7.5kg) and a distance of 12 laps within the 10 minutes, we were able to
we were able to set ourselves far apart from the competition. Although most of the competitors also reached the
12 laps, so we were playing at the same level in terms of efficiency, but half of the payload was
payload was due to the enormously long but thin wings.
During Mission 3, Hugo 5 was able to show just how much power it has. Despite a weight of 6.5kg, one of the heaviest
of the heaviest aeroplanes in the competition, we were able to achieve the fastest lap time of 1 minute
and 19 seconds, despite an antenna with a length of 97 centimetres (a longer antenna
longer antenna would not have fitted into the transport box). Finally, we tried to improve the ground
mission.
After we had tested one of our prototypes the evening before and
prototype the night before and it withstood a weight of over 1000 pounds (approx. 450kg), we wanted to demonstrate this with the final competition aircraft. Unfortunately, in the heat of the Arizona desert, it gave up at around
930 pounds and one wing buckled. But that couldn't stop us from completing one last
final flight, for which we quickly repaired the wing with an additional layer of carbon fibre, and our pilot
carbon, and our pilot demonstrated his flying skills with a beautiful aerobatic flight; the negative
flight characteristics of the negative V position.
Contact
Do you have question regarding the project or want to join us? Send us an email and get in touch.
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