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OSU Team Orange "Dirty Dozen"
Summary
The OSU Orange "Dirty Dozen" airplane was designed and built in 1995 by a team of Aerospace, Mechanical, and Electrical engineering students at OSU as a project for MAE 4374 Aerospace Systems Design. The design goal was to build an aircraft subject to the SAE Heavy Lift contest rules. The most restrictive design constraints included a total planform area limit, a runway of 200 ft, as well as the restriction to an unmodified 0.61 cu in K&B glow engine. The Dirty Dozen team name refers to the twelve official members of the team.
The Airplane The Team Multimedia The Mission
Specifications
Wing
Wing Span: 9.25 ft
Wing Area: 6.84 sq ft
Aspect Ratio: 12.5
Taper Ratio: 0.45
Wing Incidence: 10 deg
Wing Dihedral: 4 deg
Airfoil: Wortman FX-63 137
Fuselage
Length: 5.09 ft
Propulsion
Engine: Unmodified K&B 0.61 cu in glow
Fuel: 10% Nitro RC engine fuel
Propeller: 13x6
Static Thrust: lb
Weights
Dry weight: Approx 9 lb
Payload: Approx 19 lb
Gross Weight: Approx 28 lb
Features
Automatic Angle of Attack hold autopilot (custom made)
Vane-based alpha sensor with optical encoder (see picture)
Fuselage based on a "spine" type design. All major load paths go through the spine, and all major systems connect to it.
"T" tail design
Straight leading edge (Forward sweep)
The Dirty Dozen Team was lead by a chief engineer, and was divided into 4 technical groups: Aerodynamics/Stability and Control, Propulsion, Structures, and Systems.
Chief Engineer: Cole Stephens
Aerodynamics / Stability and Control
David Lewis (Lead)
Steven Nichols
Propulsion
Heather Van Alstine (Lead)
Joe Connor
Structures
Brian Perry (Lead)
Chris Nichols
Bobby Reyes
Matt Fritz
Systems
Andrew Tan (Lead)
Sugianto Jasin
John Hawkins
Pilot
Paul Reinman
Faculty Advisor: Dr. Andrew S. Arena, Jr.
Video
It is recommended that you right click on the link and use "Save Target as..." to download the video to your computer before playing.
Dirty Dozen Video: This is the video presented by the team at the final presentation.
Pictures
(Hover cursor over any thumbnail on this page for a description)
This is the drawing package for the Pink Panther (Note that significant number of the drawings were done at the time by hand)
The design goal was to build an aircraft subject to the SAE Heavy Lift contest rules. The contest goal was to design and build an aircraft that could carry as much steel payload as possible subject to certain design constraints. The constraints of the design in 1995 included:
A 200 ft. runway
An unmodified K&B 61 glow engine
A total planform area of no more than 1200 sq in. This area included all surfaces visible from a planform view of the aircraft, so tail area, fuselage, and even wheel area had to be taken into account.
This was the first year that the aero design class were to actually build and fly their designs. The intent was to not go to the contest the first year, but to have a flyoff in Stillwater, subject to the SAE contest rules. On the day of the flyoff, schedule was for the teams to make a final design presentation in the NRC, and then the teams and spectators were to meet at the Stillwater Municipal airport for an actual flyoff. Rainy conditions made the flyoff very difficult, and when the Pink Panther made a flight attempt, it ultimately crashed. The Dirty Dozen team was not able to make an attempt that day. Ultimately both teams developed aircraft that flew well with a significant amount of payload, and were pioneers in the OSU Aerospace Systems design class.