BIOBUZZ Shot Sim

Field · top view

Ball path (ground track)

Drag or click to move the robot · arrow keys nudge 1 in (Shift: 6 in)

Working…

—shots that score

Calculating the best arc…

Required arc

Motor & flywheel

Motor speed used

080% · 92%100% of free speed

Shot

Ball

Shooting into

That HIVE's upward CELL

Shooter exit height

Motor & flywheel goBILDA Yellow Jacket motor (8 mm REX)

Motors per wheel

Gearing (wheel : motor)

Shooter type

Wheel

Wheels per shaft Extra flywheel

Speed control

Battery voltage under load Motor top speed scales with voltage. 12.0 V is the rated value and a safe end-of-match number; a fresh battery holds about 13 V. Time between shots

Advanced: exit efficiency

Ball exit speed ÷ wheel surface speed

A hooded shooter ideally launches at half the wheel's surface speed. Measured shooters land around 0.30–0.45, so lower this if your real shots come out slow.

Robot

Robot precision

Robot x (in) Robot y (in)

x runs toward the blue alliance wall, y away from the audience; (0, 0) is the field center under the HIVE.

The arc

Side view along the shot and a 3-D view, both to scale.

Side view

Best arcSpeed-window edges

3-D view

Drag to orbit · scroll or pinch to zoom

Every goBILDA Yellow Jacket from this spot

Same wheel, gearing and shooter. Click a row to use that motor.

Motor	Free speed	Motor rpm needed	Of free speed	Gear-up for 80%	Recovery	Hit rate	Verdict

How this works & assumptions

The three verdicts

POSSIBLE: at least 80% of shots score and the motor runs under 92% of its free speed.
NOT CONSISTENT: 40–80% score, or the motor is near its limit.
WON'T WORK: no clean arc, the motor can't reach the speed, or under 40% score.

Ball flight

Each arc is integrated with air drag (C_D 0.45) and backspin lift (C_L = 0.2 · min(spin ratio, 1)) measured on 26-hole pickleball-style balls like Pollen and Nectar. The ball has to pass cleanly through the CELL mouth; touching any edge, the frame, another CELL or a wall counts as a miss.

Hit rate

Your robot never shoots perfectly. Each shot is off by random amounts in launch angle, aim and exit speed (the precision setting). Speed scatter also grows when the motor has little headroom or the flywheel hasn't recovered from the last shot. The hit rate is the share of those shots that still score.

Field

HIVE and CELL geometry follows the 2026–27 Competition Manual (§9.6) and the Event Field Setup Guide; the field is the measured 141 in between wall faces. Match start has the red upward CELL on the audience side; every TIP flips it.

Motors & flywheel

All eleven goBILDA 5203 Yellow Jacket motors (8 mm REX shaft). The 5204 versions with the 80 mm REX shaft have the same specs.
Usable free speed is 97% of the listed rpm (goBILDA tests the 1:1 motor at 5,800 of 6,000 rpm).
Each shot drains about twice the ball's energy from the flywheel; recovery follows the motor's torque–speed line at full power.
Wheel inertia values are estimates (±25%); exit efficiency is adjustable under Advanced.

Unofficial student tool. Not affiliated with FIRST, goBILDA or AndyMark.