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Screens from ProFAA Demonstration. ProFAA Computer Program Basic Index Display. ProFAA Computer Program Zoomed Display. ProFAA Computer Program Right-Click Straightedge Detail. ProFAA Computer Program Right-Click Straightedge Detail. ProFAA Computer Program Index Values Over Sections.
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ProFAA Computer ProgramStrut Model • Includes damping forces due to: • Velocity squared hydraulic damping. • Strut seal Coulomb friction. • Strut bearing Coulomb friction due to strut inclination. • Two-to-one breakaway-to-sliding friction. • All wheels lumped into one equivalent wheel. • Unsprung mass is ignored. • Gas compression spring. • Linear tire spring with linear damping. 11
ProFAA Computer ProgramSimulation – Zero Coulomb Friction 12
ProFAA Computer Program Simulation – 4 x Coulomb Friction 13
ProFAA Computer ProgramEffects of Coulomb Friction Nose Gear Strut Dynamic Coefficient Main Gear Strut Dynamic Coefficient 14