NYC FIRST
Velocity Arena
Endurance Decay Demo
Endurance decay — demonstration
Velocity Arena · Day 2 · currentPower = 100 − decayRate × t ÷ 40 · wheelSpeed = currentPower × motorPower ÷ 100
Team stats
7
3
Points used: 10 of 20 10 remaining
0
Motor power
35
Speed × 100 ÷ 20
Decay rate
17
20 − Endurance
Current power
100
at t = 0s
Wheel speed
35
cp × mp ÷ 100
micro:bit LED display
25 / 25 LEDs
plot bar graph of currentPower up to 100
35% wheel speed
No power remaining — robot has stopped.
Step 1: Current power (starts at 100, decays over time)
currentPower = 100 − 17 × 0 ÷ 40 = 100
Step 2: Wheel speed (motor power scaled by remaining power)
wheelSpeed = 100 × 35 ÷ 100 = 35
currentPower starts at 100 (full power) regardless of Speed. Speed determines the motor's top speed (motorPower). Endurance determines how fast power drains (decayRate). These are independent — changing Speed does not affect how long the bot survives.
Teams run the robot for the full 3-minute match. Notice distance covered in the first 30 seconds and the last 30 seconds.
First 30 seconds
Avg wheel speed (predicted) —%
Wheel speed at t=0s —%
Wheel speed at t=30s —%
Last 30 seconds (150–180s)
Avg wheel speed (predicted) —%
Wheel speed at t=150s —%
Wheel speed at t=180s —%