Grand Slam Trajectory Lab | MLB Ballpark Aerodynamics & Spray Simulator

Launch Monitor Controls

Exit Velocity 113.8 mph Launch Angle 28.0° Spray Angle -18.0° (LF Pulled) Backspin Rate 2450 RPM Ballpark Target Truist Park (1,050 ft)

Bases Loaded • 4 RBI Opportunity

Every out runner clears. A home run converts +2.19 Run Expectancy and adds 4 runs directly onto the board.

Statcast Aerodynamic Simulation

FLIGHT: 0.0 s

APEX: 92 ft

DISTANCE: 443 ft

GRAND SLAM!

Cleared Truist Park LF by 48 ft

Projected Distance

443 ft

True trajectory with drag

Exit Speed & Angle

113.8 / 28°

99th percentile “Barrel”

Max Apex Height

94 ft

Peak ballistic crest

Hang Time

5.34 s

Total flight duration

MLB Run Expectancy (RE24) Swing

Before pitch (Bases loaded, 1 out): 1.54 expected runs.
Post-Grand Slam (4 Runs in + bases empty): 4.26 runs.

+2.72 Net Runs Added

Statcast Barrel Classification

At 113.8 mph and 28°, this batted ball registers an MLB-wide expected batting average (xBA) of .988 and expected slugging percentage (xSLG) of 3.920.

30 / 30 MLB Parks HR

The Physics of a 440+ Foot Grand Slam

When Ronald Acuña Jr. connects with a fastball, the resulting ball flight is determined by fluid dynamics, non-linear air resistance, and the Magnus effect. Here is how our solver calculates the flight path:

1. Quadratic Aerodynamic Drag

A baseball travels through air at Reynolds numbers around 150,000–220,000. Drag force scales with velocity squared: F_drag = 0.5 * ρ * v² * C_d * A. At 114 mph, drag decelerates the ball by over 35 mph before landing.

2. Magnus Force & Spin Lift

Backspin (2,000–3,000 RPM) creates differential air pressure across the top and bottom of the ball. The resulting upward lift force opposes gravity, extending hang time and keeping high-exit velocity liners airborne deep into the seats.

3. Stadium Wall Profiling

Different parks alter home run probability dramatically. A 380-foot drive to left-center might clear Atlanta’s 8-foot wall but bounce off Boston’s 37-foot Green Monster, turning an apparent home run into an RBI double.