Shredder

2010
Orange

"Shredder" was designed to compete in the 2009/2010 AIAA/Cessna/ONR Design/Build/Fly contest, held in Wichita, KS in April of 2010. The aircraft was designed for a simulated cargo plane mission. Within this mission were three objectives. Mission one was a ferry flight, where score depended on weight of the system and flight time. Mission two was a loading mission, where softballs were loaded into the fuselage of the plane. Score for this mission involved weight and loading time. Mission three was a cargo mission, where ‘bats’ had to be attached to the outside of the plane. Score for this mission was based on number of bats carried and flight time. Several design constraints were placed on the planes, such as battery number, use of certain types of materials, and where the two types of cargo would be carried. Optimization was done for the required missions, and "Shredder" finished in first place at contest.

Specification List: 

Wing

  • Wingspan:        6 ft
  • Wing Area:       4.5 sq ft
  • Aspect Ratio:    8
  • Airfoil:               Eppler 422

Fuselage

  • Length:     45.5 in
  • Width:     8.75 in
  • Height:     5.5 in

Propulsion

  • Motor:         Neu 1905-1.5Y
  • Controller:    Jazz 55-10-32
  • Fuel:            26 Elite 10 batteries
  • Propeller      18 in

Weights

  • Empty:    4.66 lb
  • Battery:     1.33 lb
  • Payload (mission 2):    .4 lb
  • Payload (mission 3):    6.25 lb max
  • Max Gross (mission 3):       10.91 lb

Features

  • Internal payload grid with "hammock"
  • Bats carried underneath fuselage
  • Composite landing gear
  • Balsa construction
  • Speed loading setup

Performance

  • Take off at gross weight (GW):    65.7 ft.
  • Max climb rate (GW):    7.3 ft/sec
  • Stall speed (GW):         41.55 ft/sec
  • Maximum speed:           85 ft/sec
Team Info: 

The OSU Orange design team was led by a Chief Engineer, and divided into four primary groups: Aerodynamics/Stability and Control, Propulsion, Structures, and CAD.

Chief Engineer: Eric Provo   

Aerodynamics / Stability and Control:

  • Don Koeniguer (Lead)
  • Dylan Sirbaugh
  • Grant Packard

Propulsion   

  • Cody Combs (Lead)
  • Adam Strawmyer
  • Marshall Tarrant
  • Eric Wolf

Structures   

  • Justin Roberts (Lead)
  • Jess Koeniguer
  • James Leonard
  • Anna Martin
  • Chris Quinnett
  • Joe Searle
  • Austin Huling
  • Tyler Stein
  • James Baugh
  • Brad Duvall
  • Zak Longacre
  • Cindy Choa
  • Michael Elliot
  • Brian Taber

CAD: Johnny Chandler

Pilot: Dan Bierly   

Assembly Crew:

  • Cody Combs
  • Tyler Stein
  • Dylan Sirbaugh   

Loading Crew:

  • Grant Packard
  • Adam Strawmyer
  • Anna Martin   

Report Group:

  • Jess Koeniguer
  • Grant Packard
  • Eric Wolf
  • Anna Martin   

Faculty Advisor: Dr. Andrew S. Arena, Jr.

Assistant: Joe Conner

*(The above team roster does not include all people involved in the project)

Contest Summary: 

The 2010 DBF profile involved three missions. The variables worth the most points in the score were the loading time for mission two and the system weight, which was factored into two missions. Overall score was calculated by multiplying total flight score by written report score.

Challenges:

  • Avoiding cg change with the differing missions.
  • 100 ft runway.
  • Electric motor, and NiMH, or NiCd batteries required.
  • Loading the softballs as fast as possible.
  • 4 ft X 2 ft X 2 ft box limit.
  • Fasteners for the 'bats.'

On Saturday morning, OSU Orange was in first place because of report score. This meant that they flew first for each new mission set. Because of flight scores for missions 1 and 2 on Saturday, Orange team was in close competition with OSU Black and Purdue by the end of Saturday. There was time, however, for one more flight. OSU Orange geared up for mission 3. As the plane went up, the crowd was silent, all eyes watching "Shredder." As the laps were finished, everyone held their breath as the plane came in for a landing. When the plane touched down perfectly, the crowd erupted in cheers. With a shout of "Orange...Power!" the day ended with high spirits.

Sunday came, and the other planes in top competition flew the third mission. Scores were neck and neck, and the re-flight would be what determined the contest. The day rolled by, and the team was overflowing with anticipation. Mission 2 was chosen to fly again, as that was the mission that could bump Orange Team's lead up the most. The loading crew had practiced the night before, adapting their loading scheme with the contest rules that had been revealed the day before. When the time came to fly again, the day was once again nearing the end. After the assembly crew set up the plane, the loading crew took their positions. As the timer began, the crowd cheered and screamed, pushing the crew into fever pitch. As the loading finished, the crowd silenced, waiting to hear the time. With a cry of "12 Seconds!" the fastest loading time was posted, and Orange Team's first place lead increased.

Complete Contest Rules

Official Contest Summary and Results

Results Summary: 

Report Score:      96  (Highest at the contest)

Total Flight Score:      216.9

Total Score:      20818

Overall Place:      1st

Sponsors: 

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.

Sandia National Laboratories

Chris Quinnett Drywall

NASA

OSU SGA

Redbull

Ceat Student Council

•General Electric

Lockheed Martin

Kenexa

Spirit Aerospace

Category: 
Design, Build, Fly