The Kitty Hawk was named in honor of the 100th anniversary of the Wright Brothers first flight, and was designed to compete in the 2002/2003 AIAA/Cessna/ONR Design/Build/Fly contest held in Ridgely River MD, in April of 2003. The objective was to fly two different missions: a missile decoy mission in which the aircraft carried a large external payload, and a sensor deployment mission in which the aircraft remotely deposited a payload on the runway. The mission score also depended on a timed task in which the aircraft which was initially stored in a 4'x2'x1' box, had to be assembled as quickly as possible. Aircraft were subject to several design constraints such as runway length, wing span, battery type and size, motor type, etc. The Orange team finished in 6th place overall at the contest.
- Wingspan: 8 ft.
- Wing Area: 9.38 sq. ft.
- Aspect Ratio: 6.75
- Airfoil: Eppler 423
- Length: 3 ft. main, 5.75 ft with tail boom extended
- Width: 7 in
- Height: 7.5 in
- Motor: Astro 640S geared 3.1:1
- Controller: Astro 204D
- Fuel: 24 SR2400 NiCd batteries in series
- Propeller: 20 in
- Empty Weight (without batteries): 10.38 lb
- Battery weight: 3.24 lb
- Payload weight: 5 lb (internal)
- Gross weight: 20 lb (including external payload)
- Pneumatic main brakes
- Retractable boom tail
- "V" tail
- Remote control "bomb-bay" style payload release
- Composite carbon sandwich panels for fuselage, carbon tailboom
- Custom made Plexiglas squirrel cage internal 5 lb payload with hamster wheel.
- Takeoff distance at full gross weight: <120 ft
- Stall speed at full gross weight: 33 ft/sec
- Max rate of climb at full gross weight: 6 ft/sec
The OSU Orange design team was led by a Chief Engineer, and divided into three primary groups: Aerodynamics/Stability and Control, Propulsion, and Structures.
Chief Engineer: Catie Roy
Aerodynamics / Stability and Control:
- Andy Gardos (Lead)
- Valerie Barker
- Brandon Blair (Lead)
- Michael Duffy
- Phung Ly
- Aaron Wheeler (Lead)
- Don Carkin
- Catherine Higgins
- Patrick Lim
- Kuniko Yamada
- Carin Bouska
Pilot: Dan Bierly
Spotter: Ronnie Lawhon
Faculty Advisor: Dr. Andrew S. Arena, Jr.
Assistant: Joe Conner
*(The above team roster does not include all people involved in the project)
Teams were required to select two missions to fly at the contest, and the flight score from each was added together to achieve the overall flight score. The three missions were:
- Missile decoy: A 5 lb block payload was carried internally, and a large external cylindrical payload was also carried. The external payload was a 6 in diameter, 3 in tall enclosed PVC pipe that had to stand off a minimum of 3in from the fuselage. The difficulty factor was highest for this mission.
- Sensor deployment: The 6in x 6in x 12in 5 lb internal payload had to be flown twice around the course, and dropped on the runway after coming to a complete stop. The aircraft then had to take off and fly another two laps of the course. All this had to be done remotely. This mission had the next highest difficulty factor.
- Communications repeater: The aircraft had to fly 4 laps of the course with the internal payload and then land. The airplane also had to perform 3 360 deg turns for each lap instead of one. This mission had the lowest difficulty factor.
The mission score also depended on a timed task in which the aircraft which was initially stored in a 4'x2'x1' box, had to be assembled as quickly as possible.
Flight score was calculated as follows, and summed for two missions:
Mission Flight Time + Aircraft Assembly Time
RAC was a "Rated Aircraft Cost" which penalized many aspects of the design. It included penalties for design parameters such as; aircraft empty weight, engine power, wing area, etc. A link to the complete rules may be found below.
Overall score was calculated by summing the two best flight scores, multiplying by written report score, and dividing by the RAC.
Some of the more challenging constraints on the designs included:
- 120 ft short field takeoff distance
- Brushed electric motor using NiCd batteries
- High drag due to external payload of mission 1
- Reliable remote control release of payload in mission two. The mission required a well designed release system, as well as brakes, in order to drop the payload in the prescribed area.
- Speed assembly of the aircraft.
- Aircraft must be lifted at the wing tips at full gross weight
- Report Score: 90.5
- Flight Score: 0.83 (OSU Orange chose missions 1 and 2 for the higher scoring potential.
- Assembly time: 28 seconds
- RAC: 10.24
- Total Score: 7331.55
- Overall Place: 6th
The following sponsors contributed to the project. The OSU Orange team greatly appreciates their support, and considers them members of our team. Without their support, the project would not have been possible.
Aero Services, Inc.
NASA Oklahoma Space Grant Consortium
OSU Student Government Assoc.