Runway Excursion & Perimeter Safety Area (RSA) Analyzer

Paved Runway (Striped)

Blast Pad (Chevrons)

Standard RSA (1,000 ft)

EMAS Bed (Energy Absorbing)

Airport Perimeter Fence & Highway

Aircraft Deceleration Track

01 Aircraft, Surface & Systems Variables

Aircraft Airframe & Weight

Runway Surface Contamination

Ground Speed at Touchdown 142 kts

Touchdown Point Past Threshold 1,500 ft

Thrust Reverser Configuration

Speedbrake / Spoiler Delay 1.0 sec

Wheel Braking Schedule

Runway Wind Component 0 kt (Calm)

02 Runway Geometry & Perimeter Infrastructure

Paved Runway Length (LDA) 8,500 ft

Runway Safety Area (RSA) Extent 1,000 ft (Standard)

EMAS Arrestor Bed

Perimeter Roadway Distance 1,400 ft

03 Kinematic Telemetry & Deceleration Analysis

Ground Roll Distance

5,340 ft

From touchdown touchdown point

Peak Deceleration

0.28 G

Combined aero + wheel friction

Kinetic Energy Dissipated

342 MJ

Gross landing mass 295k lbs

Safety Boundary Zone	Standard Design / Dimension	Calculated Aircraft Velocity	Containment Margin

04 Overrun Risk Profile & Barrier Physics

Under the current approach configuration, aerodynamic drag and thrust reversers absorb approximately 28% of initial kinetic energy, with the remaining 72% dissipated through wheel braking. The aircraft comes to a complete stop prior to the runway threshold.

Runway Safety Area (RSA) Mandate FAA Part 139 requires a 1,000 ft long by 500 ft wide graded, cleared buffer free of hazardous obstacles to contain 90% of operational overruns.

EMAS Crushed Concrete Physics Engineered Materials Arresting Systems reliably halt aircraft exiting runway thresholds up to 70 knots by controlled landing-gear tire rutting.

Aviation Safety Context: Runway Overrun Physics & Perimeter Containment Risks

Runway excursions constitute roughly 25% of all commercial aviation accidents worldwide. When landing wide-body freighters—such as the Boeing 767-300F or MD-11F—heavy payload weight combined with adverse runway friction, long touchdown floats, or deferred thrust reversers can rapidly consume safety margins. Many older municipal or regional airfields, established before modern FAA Part 139 revisions (AC 150/5300-13B), feature non-standard RSAs constrained by municipal highways, railway lines, or perimeter drainage canals directly off the departure blast pad.

Hydroplaning Dynamic At tire speeds above 9 times the square root of tire pressure (psi), a water wedge lifts tires off the pavement, dropping effective friction (μ) from 0.55 down to 0.15 or less, making wheel braking virtually ineffective until ground speed decays significantly.

Touchdown Float Multiplier Every 500 feet of excess float beyond the standard 1,000 ft aiming point consumes roughly 6% to 8% of the entire stopping distance of an 8,000-ft runway, compounding any subsequent brake delay or reverser anomaly.

Public Roadway Separation Hazards Civilian traffic corridors located within 1,500 feet of unmitigated runway ends present catastrophic collision hazards during high-energy overruns unless protected by engineered arresting beds or robust vehicular redirection barriers.