DIRT Bag - sae.org · DIRT Bag™ Deployable Isolation Repair Technology Scott Huelskamp...
Transcript of DIRT Bag - sae.org · DIRT Bag™ Deployable Isolation Repair Technology Scott Huelskamp...
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DIRT Bag™
Deployable Isolation Repair Technology
Scott Huelskamp
[email protected](937) 458-0210 ext 165
Research Engineer,Project Leader
Great Ideas Competition 2008
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Composite DoD Aircraft
Composites increasingly prevalent
1980s-early 1990s: <10% structural weight
Today: 50%-90%
1.16 million pounds of composite structures annually
http://www.globalaircraft.org
Aerospace Composites: A Design and Manufacturing Guide. 1st ed (2008). Gardner Publications, Inc.
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Composite Repairs
Susceptible to impact damageLightning strikesRunway debrisTool dropsBird StrikesService vehicle collisionHail
Require sophisticated repair techniques
http://spacepug.files.wordpress.com/2008/05/lighting-plane.jpg
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Repair Process
US Department of Transportation. Federal Aviation Administration. Office of Aviation Research. (2004) Bonded Repair of Aircraft Composite Sandwich Structures. Washington D.C.
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Repair Concerns
Contamination of repair surface Airborne debris Sand Oil Engine fumes
Moisture
Temperature
REPAIRS CAN’T ALWAYS BE DONE IN A CONTROLLED ENVIRONMENT!
www.amtonline.com
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DIRT Bag™
Deployable Isolation Repair Technology
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DIRT Bag™- Support Structure
Collapsible for storage >80% volume reduction
Conformable to curved surfaces
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DIRT Bag™- Bagging
Optically clear
Tear resistant
Chemical-resistant
Water-proof
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DIRT Bag™- Hand Ports
Inspired by CRG designed medical seal
Seals around forearm
Filters air entering structure
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DIRT Bag™- Bottom sheet
Strong, non-residual PSA
Adheres through grease/dirt
Perforated inside of adhesive ring
Pristine interior prior to repair
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DIRT Bag™- Material passageway
Double pocket, hook-and-loop fasteners
Introduction of materials, tools, and hoses
No direct path from bag interior to ambient
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In Use
1. Adhesive backing is removed
2. DIRT Bag™ is applied to repair surface
3. Restraining band is removed
4. After repair, unit is removed and disposed of
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Future Adaptations
Hose ports
Material passageway “box”
Customizable system
Environmental Control System (ECS) compatibility
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Other Applications
Painting and CoatingsControlled environmentWeather independentVolatiles contained
Electronics Sensitive circuitry
Commercial MRO
http://homepage.mac.com/lesposen/iblog/B80495344/C475525321/index.html
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Advantages
Reduction in maintenance costs Rework minimized
Fleet readiness Aircraft repaired in the field Part repaired in place
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SpecialThanks
Naval Air Systems Command (NAVAIR)
Patuxent River, MD
Thank you for your funding and support of this project.
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Bibliography
US Department of Transportation. Federal Aviation Administration. Office of Aviation Research. (2004) Bonded Repair of Aircraft Composite Sandwich Structures. Washington D.C.
Aerospace Composites: A Design and Manufacturing Guide. 1st ed (2008). Gardner Publications, Inc.