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Patrick Dempsey Bridget Fitzpatrick Heather Garber Keith Hout Jong Soo Mok

ORION AEROSPACE. Structures Preliminary Design Review #1 October 12, 2000. Patrick Dempsey Bridget Fitzpatrick Heather Garber Keith Hout Jong Soo Mok. ORION AEROSPACE. Basic Layout of Wing. Spar -located at the 1/4 chord Sparcaps -spruce -1/8” x 1/8” x 6.6’ Shearweb -balsa

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Patrick Dempsey Bridget Fitzpatrick Heather Garber Keith Hout Jong Soo Mok

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  1. ORION AEROSPACE Structures Preliminary Design Review #1 October 12, 2000 Patrick Dempsey Bridget Fitzpatrick Heather Garber Keith Hout Jong Soo Mok

  2. ORION AEROSPACE Basic Layout of Wing Spar -located at the 1/4 chord Sparcaps -spruce -1/8” x 1/8” x 6.6’ Shearweb -balsa -1.5” x 1/16” x 6.6’ Ribs -balsa -spaced every 3 inches from tip -include lightening holes Added balsa at leading and trailing edge

  3. ORION AEROSPACE Geometric Layout of rib Typical rib section

  4. ORION AEROSPACE Geometric Layout of Wing -Stringers -None at this time -Many model planes do not have them -Would add weight -Wing covering- Monokote -Helps with twisting -Forms the skin

  5. ORION AEROSPACE Geometric Layout of Wing Sample of strut layout from NACA report 143

  6. ORION AEROSPACE Code • Code run using preliminary size of aircraft, load factor, and a chosen spar size • -Wing loading • Schrenk’s approximation (Raymer) • Shear force • Moment • Find centroids • Moments of inertia • Normal stress

  7. ORION AEROSPACE WING LOADING Trapezoidal approximation Elliptical approximation

  8. ORION AEROSPACE SHEAR FORCE

  9. ORION AEROSPACE MOMENT

  10. ORION AEROSPACE Normal STRESS

  11. ORION AEROSPACE Material Properties Table taken from Spring ’99 AAE 451 report (Team WTA)

  12. ORION AEROSPACE Further Testing -Test maximum shear stress of balsa using three point load test -Torsional test of wing with and without monokote

  13. ORION AEROSPACE Structure -Fuselage - balsa -Tapered box -Modeled as truss structure -Sheet on floor to hold equipment -Horizontal/Vertical tail – balsa -Modeled as a flat plate -May have to add a spruce spar due to the size of tail

  14. ORION AEROSPACE Landing Gear -Tail dragger configuration -Front wheels placed in front of center of gravity and to ensure propeller clearance -Spaced horizontally to avoid lateral tip over

  15. ORION AEROSPACE Center of Gravity Estimate -Center of Gravity -Within 5-10% static margin in front of aerodynamic center -Moment Balance -Find the weight and moment arm of every component

  16. ORION AEROSPACE Questions?

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