DBF Wind Tunnel Build Project Photos 2012-13

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DBF Competition Description and Rules:
DBF is an annual competition consisting of university students to design, build, and fly their UAV’s competitively, with certain performance criteria to meet.
 
•The contest will provide a real-world aircraft design experience for engineering students by giving them the opportunity to validate their analytic studies.
 
•Student teams will design, fabricate, and demonstrate the flight capabilities of an unmanned, electric powered, radio controlled aircraft which can best meet the specified mission profile. The goal is a balanced design possessing good demonstrated flight handling qualities and practical and affordable manufacturing requirements while providing a high vehicle performance.
 
•Rules change year to year.  This years rules have been published, and are tentative  until October 31st.
 
•AIAA DBF Website: http://www.aiaadbf.org/  
DBF 2012-13 Rules and Mission Specifics:
 
Mission Task Matrix:
Joint Strike Fighter
General:
Battery pack(s) maximum weight limit is 1.5 lb.
Teams will be allowed a maximum of 4 flight attempts or 3 successful scoring flights.  Once a mission has a successful scoring flight it may NOT be repeated to try to improve the score.
 All payloads must be secured sufficiently to assure safe flight without possible variation of aircraft cg during flight.
Assembly/flight line crew is limited to pilot, observer and 1 ground crew.
Scoring measurement units are feet; lbs,; and seconds.
Mission Sequence:
Missions must be flown in order.  A new mission can not be flown until the team has obtained a successful score for the preceding mission.
Aircraft must be designed to be capable of performing all required missions.
Specifically this requires that teams must show that all payloads fit in the aircraft during the tech inspection.
Teams will be asked to load configuration #1 (of mission #3) and must present photographs showing configurations #2-6 installed.
Aircraft must pass the wing tip load test with the larger of 4 internal stores or the maximum number of internal stores the team will attempt to fly for mission #2 plus one store “Der Red Max” on each inboard wing pylon
The number of internal stores demonstrated will be recorded and can not be altered after completing tech inspection.
The aircraft will enter the assembly area with the payload for mission 2 and 3 uninstalled.
The team will have a total of 5 minutes to load the payload and checkout the aircraft systems as fully functional.
There is no work allowed on the aircraft after the  loading/checkout time.
The RC receiver should be able to be turned on externally or must be left on. You will not be allowed to re-open any compartment after the loading/checkout time to turn on the receiver.
Only the assembly crew member, pilot and pilot assistant may go to and enter the staging box.
After the checkout is complete the assembly crew member may be swapped for a different flight line crew member if desired.
The initial upwind turn on the first lap of each mission will occur after passing the turn judge (signaled by raising a flag).  The aircraft must remain in unaided visual control distance of the pilot at all times.  The Flight Line Judge may require turns to be made to remain in a safe visual control range at his discretion.
Missions:
Aircraft will use ground rolling take-off and landing
Missions will simulate take-off from a small austere field.
The aircraft will be placed such that all ground contact points are completely inside an approximately 30 x 30 ft square marked on the runway.
Aircraft must successfully take-off before crossing any edge of the square.
Aircraft must complete a successful landing at the end of each mission for the mission to receive a score.
A successful landing is outlined in the general mission specification section below.
Mission 1 – Short Take-off
Take-off within the prescribed area.
Maximum number of complete laps within a 4 minute flight time
Time starts when the throttle is advanced for the (first) take-off (or attempt)
A lap is complete when the aircraft passes over the start/finish line in the air
Mission performance will be normalized over all teams successfully completing this mission.
Mission score M1= 2 * (N_Laps_Flown/Max_N_Laps_Flown)
Must complete a successful landing to get a score
Mission 2 – Stealth Mission
Take-off within the prescribed area.
3 Lap internal-stores flight.
 Stores must be carried internal to the aircraft in the main fuselage (not a secondary pod) or completely inside the wing.
Access to the stores for loading must be through the lower surface of the aircraft, representative of bay doors though the doors need not be mechanized.
Stores must be aligned to the direction of flight (tails aft, body along flight axis).
Internal stores must be secured to a mounting structure/rack that is a permanent part of the aircraft structure.
They must be secured and positioned such that they “could” be released “down” one at a time.
Stores must not contact each other or any part of the aircraft structure except for the specified mount/rack.
Store mounting points must secure the store by/on the store body.
Stores do not need to be capable of remote release (stores will not be released as part of the flight).
No special fairings or blisters may be added to the aircraft, all external surfaces must be the same for all 3 missions.
Weight of internal fixtures used to secure stores WILL be included in the Empty_Weight measurement.
Mission performance will be normalized over all teams successfully completing this mission.
Mission score M2= 4 * (N_Store_Flown/Max_N_Store_Flown)
Must complete a successful landing to get a score
Mission 3 – Strike Mission
Take-off within the prescribed area.
3 lap mixed-stores flight.
Payload will be a random draw of internal and external stores (Roll of 1 dice).
Teams will roll the dice when entering the assembly area.
Internal stores must follow requirements outlined for Mission 2
External stores must be wing pylon mounted and fully external to the wing profile (no submerged stores).
Store fins must be below the wing lower surface trailing edge height.
Store mounting points must secure the store by/on the store body
Weight of removable pylons WILL NOT be included in the Empty_Weight (EW3) measurement
External stores may not overlap/block the access/deployment area of internal store location(s).
Stores must have a minimum store-to-store separation of 3″ on centerline.
The most inboard store(s) centerline must be at least 3″ from the aircraft centerline.
Mission performance will be normalized over all teams successfully completing this mission.
Mission score M3= 6 * (Fastest_Time_Flown/Team_Time_Flown)
Time starts when the throttle is advanced for the (first) take-off (or attempt)
Time ends when the aircraft passes over the finish line (in the air) at the completion of the last lap.
Must complete a successful landing to get a score